When phosphorus forms an ion with the same oxidation number, it is the phosphate, PO 4 3-, ion, as shown in the figure below. 1. In aqueous solutions it slowly undergoes hydrolysis to hydrogen peroxide and phosphoric acid. Using the values in the formula, Phosphoric acid is a crystalline liquid which is colourless and odourless. LOGIN TO VIEW ANSWER. You know that the ion has a "(3-)" overall charge the ion is made up of one phosphous atom and four oxygen atoms oxygen's oxidation state in most compounds is -2. Effect of oxidation state of manganese in manganese oxide ... This happens because of the inert pair effect. oxidation state of h3po4 - dev.streettrucksmag.com The order of the oxidation state of the phosphorus atom in ... A substance that speeds up a reaction and is chemically unchanged at the end. What happens when H3PO3 is heated? from Chemistry The p ... In which species does phosphorous have an oxidation number of zero? Then I realised that the two Hydrogens could be ionised, so I'd be left with $\ce{P2O7^4-}$.. It is very hard to reduce any of these ions in aqueous solution, and phosphate is no exception. The H 3 PO 2 is a neutral molecule, so the overall charge is zero (0).. The Oxidation Number of Hydrogen (H) is + 1. What is the oxidation number of PO4 in the compound Ca3 ... \text{ C}$ orthophosphoric acid yields Phosphorus pentoxide and water as the products of the reaction. The same goes for $\ce{H3PO4}$ resulting in +5 oxidation state of $\ce{P}$. What is the ion of H3PO4? - Ammarksman.com H3PO4 can dimerize like carboxylic acids via dehydration reaction. We also know that the oxidation states will cancel out when using 4 Phosphorus Atoms and 3 Sulfur Atoms, given that the overall charge of the molecule is neutral. 10. Since phosphorus is a member of group 5A, it has 5 electrons in its valence shell. What is the total ionic equation of this: 3CaCl2(aq) + 2K3PO4(aq) → Ca3(PO4)2(s) + 6KCl(aq) Shw all physical states of the reactants and products Chemistry For a reaction between sodium phosphate and strontium nitrate write out the following: a) The balanced molecular equation b) The ionic equation c) The net ionic equation a) I think I have . So, H3PO4 cannot be a reducing agent. The Oxidation Number of Oxygen (O) is -2. 2 Answers Ujjwal Mar 24, 2018 #P_4# Explanation: . It is present in teeth and bone and helps in metabolic processes. H3PO4 Show work. C.how many of P2O5 and H2O will be produced in the reaction? Noun. PDF Oxidation Numbers: Rules We are given the four . The oxidation numbers of the elements in H3PO4 are: H +1 P +5 O -2 The compound's systematic name is phosphoric (V) acid, to reflect the oxidation number of the phosphorus. (a) H3PO4 (b) Al(OH)3 (c) SeO2 (d) KNO2 (e) In2S3 (f) P4O6 The oxidation numbers of the elements in H3PO4 are: H +1 P +5 O -2 The compound's systematic name is phosphoric(V) acid, to reflect the oxidation number of the phosphorus. What is the oxidation state of sulfur in h2so4? Since phosphorus is a member of group 5A, it has 5 electrons in its valence shell. The addition of water to a molecule. Your IP: 217.112.181.131 So, nitrogen here has an oxidation state of +3. The oxidation state of hydrogen is +1 in itscompounds, except for metal hydrides, such as NaH, LiH, etc., inwhich the oxidation state for H is -1. If $\ce{N}$ is reduced to say +4 as in $\ce{NO2}$ or +2 in $\ce{NO}$, it's charge is reduced and $\ce{N}$ is therefore an oxidizing agent for that particular reaction oxygen's oxidation state in most compounds is −2. 34 Votes) In the phosphate ion, the oxidation number of phosphorous is+5. What is the oxidation number of P in H3PO4. Medium Open in App Solution Verified by Toppr Correct option is A 8 Oxidation state of P in H3 PO4 is 5 and oxidation state of P in H3 PO3 is 3 ( taking oxidation state of oxygen is -2 and hydrogen +1). Posted. The pure compound is a colourless solid with a structure as shown below. Voted. Experts are tested by Chegg as specialists in their subject area. The oxidation state of hydrogen is +1 in its compounds, except for metal hydrides, such as NaH, LiH, etc., in which the oxidation state for H is -1. The oxidation numbers of P in H3PO3, PH3, and H3PO4 are +3, −3, and +5 respectively. So sum is 5+3=8. Find the sum of oxidation state of phosphorus in H3 PO4 and H3 PO3 . oxidation number +2 Fluorine always has an oxidation number . We review their content and use your feedback to keep the . The sum of the oxidation numbers in PO43-, a polyatomic ion, is -3, the charge of the ion. Oxidation state of P in H3PO4 is 5 and oxidation state of P in H3PO3 is 3 ( taking oxidation state of oxygen is -2 and hydrogen +1). Phosphoric Acid is a weak acid with chemical formula H 3 PO 4. For an atom in its elemental form (Zn, Cl2, C(graphite), etc.) The oxygen number of Phosphorus in phosphine $P{H_3}$ is $ - 3$ because the hydrogen is having a total of plus three so the phosphorus $ - 3$ will neutralize it. The orthophosphoric anhydrous acid is a white, crystalline solid which melts at 42.35°C. What this tells you is that the oxidation number of P in phosphorus acid must be +3 or +4, while the value for phosphoric acid must be +5 or +6. (i) H3PO2 (ii) H3BO3 (iii) H3PO4 (iv) H3PO3 10. ; As the given compound is neutral, its total charge is equal to 0. O.S. Possible. What is the oxidation number of P in H3PO4. Using the oxidation state rules, determine the oxidation state of phosphorus in a) P4O6; b) H3PO4; c) Na3P; d) PH4+; e) POCl3 P-> +3 (O is -2) P-> +5 (O is -2, H is +1) Solution: Option (iii) is the answer. [Answer] What is the oxidation state of sulfur in H2SO4 . 1. potassium permanganate - a poisonous salt that forms dark purple crystals and is purple-red when dissolved in water; used as an oxidizing and bleaching agent and as a disinfectant and antiseptic. Fundementally yeah, it is all to do with the oxidation states as per P4O10, is Phosphorus (V) Oxide. ON P = − 3 + 8 = +5. . PDF Oxidation Numbers: Rules We are given the four . O.S. 2. The compound is a triprotic acid with acid dissociation constants pK a1 = 1.1, pK a2 = 5.5 and pK a3 = 12.8. For an ion (Li+, Al3+, etc.) Chemistry. +5 What is the oxidation state of iodine in io3 −? The stability of + 5 oxidation state decreases and that of + 3 state increases (due to invert pair effect) down the group. This is because every element in its elemental state has zero oxidation state. All the elements present in this group show +3 and +5 oxidation states. Phosphorus ahs an ocxidation number of 3. What is the meaning of KMnO4? 4.1/5 (21 Views . The oxidation numbers for the individual atoms in the second reaction are below. Phosphorus also shows +1 and + 4 oxidation states in some oxo acids. Different treatments have been so far tested to remove reduced phosphorus via oxidation to phosphate: using a Pd/activated carbon catalyst [7], a combined UV light and hydrogen peroxide system [8 . Assign oxidation numbers to the underlined elements in each of the following species: (a) NaH2PO4 (b) NaHSO4 (c) H4P2O7 (d) K2MnO4 (e) CaO2 (f) NaBH4 (g) H2S2O7 (h) KAl(SO4)2 . The most important oxidation numbers for phosphorus are -3, +3, and +5 (see table below). It is a poor oxidizing agent. It is a non-toxic acid in its pure state and solid at room temperature and pressure. The oxidation state of phosphorus in H 3 P O 4 is + 5. acidic strength of H3PO2>H3PO3>H3PO4.For all the oxyacids of phosphorus, P atom remains in the SP3 hybridization with one double bond and three single bonds compulsory . (a) H3PO4 (b) Al(OH)3 (c) SeO2 (d) KNO2 (e) In2S3 (f) P4O6 The oxidation numbers of the elements in H3PO4 are: H +1 P +5 O -2 The compound's systematic name is phosphoric(V) acid, to reflect the oxidation number of the phosphorus. What happens when phosphoric acid is heated? It would neutralize the negative twelve of oxygen. The oxidation state of oxygen in its compounds is -2, except for peroxides like H2O2, and Na2O2, in which the oxidation state for O is -1. Note: Oxygen commonly shows the oxidation state -2 except in its peroxide compounds where it's oxidation state is -1. The number of hydrogen (H) atoms in 80 g phosphoric acid (H3PO4) is 1.5 x 1024 atoms. PCl3 + 3 H2O → HPO(OH)2 + 3 HCl. Oldest. The tetrathionate anion,S. Give the oxidation state of phosphorus in H3PO4 +5. Oxidation state of P in H3PO4 is 5 and oxidation state of P in H3PO3 is 3 ( taking oxidation state of oxygen is -2 and hydrogen +1). Rules for assigning oxidation numbers. The order of the oxidation state of the phosphorus atom in H3PO2, H3PO4, H3PO3 and H4P206 is H3PO4 > H4P206 > H3PO3 > H3PO2 H3PO2 > H3PO3 > H4P206 > H3PO4 H3PO4 > H3PO2 > H3PO3 > H4P206 H3PO3 > H3PO2 > H3PO4 > H4P206 Answer. ON P + 4 × ( − 2) = − 3. +6 . However, the stability of +5 oxidation state decreases down a group, whereas the stability of +3 oxidation state increases. • Dimerization. In H3PO2 and H3PO3 oxidation state of P is +1 and +3 respectively, which can further be oxidized to a higher oxidation state. The Oxidation Number of Oxygen (O) is -2. H3PO4 (3.09% H, 31.6% P, 65.3% O) is a clear colorless liquid used in fertilizers, detergents, food flavoring, and. This problem has been solved! This problem has been solved! (iii) H3PO4 (iv) H3PO3 . x = +5. In one molecule of H3PO4, there are 3 atoms of hydrogen, 1 atom of phosphorus and 4 atoms of oxygen. one phosphorus atom 1 ×ON P + 4 ×ON oxygen four oxygen atoms = −3. Phosphoric acid, H3PO3 has structure where there is one hydrogen (-H), two hydroxyl groups (-OH) and one oxgen (=O) attached to the central phosphorus P . = 0. The behaviour is linked with the oxidation state of phosphorus atom in the two acids. What is the oxidation number of phosphorus in po4 3? We are given the four options with phosphorus in them. The oxidation number of Phosphorus (P) is the unknown here.Let us consider it as x.. Phosphoric acid H3PO4: it is a triprotic acid which means it ionizes three protons. Uses of H3PO4 • It is used as a phosphate fertilizer. 1 In H3PO4 oxidation state of P is +5, which is highest for P. Hence H3PO4 cannot serve as a reducing agent . Specific Rules: 1. We're being asked to determine the oxidation number of phosphorus in each of the given acids. P4 (elemental phosphorous) HPO2 Li3PO3 H3PO4 PH3. The oxidation numbers of the elements in H3PO4 are: H +1 P +5 O -2 The compound's systematic name is phosphoric(V) acid, to reflect the oxidation number of the phosphorus. State the meaning of the term catalyst. Question: What is the oxidation number of P in H3PO4. Phosphorus is quite different from As and Sb. 2. The Chemistry of Nitrogen and Phosphorous The oxidation states of P atom in POCl3 , H2PO3 and H4P2O6 , respectively, are. Few popular oxoacids of phosphorus. We are given the four options with phosphorus in them. 4. The oxidation state of any chemically bonded carbon may be assigned by adding -1 for each bond to more electropositive atom (H, Na, Ca, B) and +1 for each bond to more electronegative atom (O, Cl, N, P), and 0 . Newest. Install Kunduz to see the solution & ask doubts to our tutors for free! As a result, the most common oxidation states it can have are +3 (s2p0) or +5 (s0p0). The oxidation state of Phosphorus in H3PO4 is +5 which cannot be oxidized further. . Thus, H. 2. is oxidized. The oxidation number for phosphorus in H3PO4 is +3. 1 - MARK QUESTIONS. Click hereto get an answer to your question ️ Find the sum of oxidation state of phosphorus in H3PO4 and H3PO3 . A +1, +1, -2 B +1, +5, -2 C +3, +5, -8 D -1, -1, +2 Expert Answers | Certified Educator H_3PO_4 is made up of and . Therefore the sum of oxidation states of phosphorus in H3PO4 and H3PO3 is x+y that is 5+3=8. Hydrolysis of phosphorus trichloride with acid or steam results Phosphorous acid. Step4. What are the oxidation states of phosphorus in H 3 PO 3? 4y. Only an element, not a compound, can be assigned an oxidation number. Similarly, nitrogen forms nitric acid, HNO 3 , which contains an N=O double bond, whereas phosphorus forms phosphoric acid, H 3 PO 4 , which contains P-O single bonds, as shown in the figure below. The oxidation state of oxygen in its compounds is-2, except for peroxides like H2O2, andNa2O2, in which the oxidation statefor O is -1. Because I wasn't sure if Oxygen was bonded to a Hydrogen or not. Chemistry . The Chemistry of Nitrogen and Phosphorous The oxidation states of P atom in POCl3 , H2PO3 and H4P2O6 , respectively, are. A number of neutral iodine oxides are also known. It is also known as phosphoric (V) acid or orthophosphoric acid. What happens when phosphoric acid is heated? To find the correct oxidation state of P in H3PO4 (Phosphoric acid), and each element in the molecule, we use a few rules and some simple math.First, since t. Assigning oxidation numbers to organic compounds. Expert Answer. The most important oxidation numbers for phosphorus are -3, +3, and +5 (see table below). What is phosphoric acid? Iodine can assume oxidation states of −1, +1, +3, +5, or +7. There is very little difference in acid strength in the series H3PO4, H3PO3 and H3PO2 because a) Phosphorus in these acid exists in different oxidation states b) Number of unprotonated oxygen responsible for increase of acidity due to inductive effect remains the same c) Phosphorus is not a highly electronegative element d) Phosphorus oxides . P_4 Phosphorus in P_4 has a oxidation number of zero. KunduzApp. Enter your number below to get the . What this tells you is that the oxidation number of P in phosphorus acid must be +3 or +4, while the value for phosphoric acid must be +5 or +6. If one takes the oxidation number of hydrogen +1 in each case, one will get an oxidation number of +5, +3 and +1 for phosphoric acid, phosphorous acid and hypophosphorous acid respectively. Expert Answer. Oxidation of O = -2. Strong reducing behaviour of H3PO2 is due to (i) Low oxidation state of phosphorus (ii) Presence of two -OH groups and one P-H bond 91 p-Block Elements (iii) Presence of one -OH group and two P-H bonds (iv) High electron gain enthalpy of phosphorus 11. Hence sum of oxidation state of phosphorus in H 3 P O 4 and H 3 P O 3 is 8. As a result, the most common oxidation states it can have are +3 (s2p0) or +5 (s0p0). The order of the oxidation state of the phosphorus atom in H3PO2, H3PO4, H3PO3 and H4P2O6 is asked Apr 23, 2018 in Chemistry by paayal ( 147k points) jee mains AIPMT 1994: Phosphorus has the oxidation state of + 3 in (A) Phosphorous acid (B) Orthophosphoric acid (C) Hypophosphorous acid (D) Metaphosphoric aci See the answer See the answer See the answer done loading. Orthophosphoric Acid (H 3 PO 4) 1. Nitrogen exhibits + 1, + 2, + 4 oxidation states also when it reacts with oxygen. Give the oxidation state of phosphorus in P4. Three Mn oxide films with different oxidation states of Mn were prepared by PLD, which show different capacitance performances. H3PO4 can dimerize like carboxylic acids via dehydration reaction. This means that you can write. General Rules: 1. Neon actually produces an orange red glow in the tube and on mixing with the vapours of other gases, glows or signs of different colours can be obtained. H3PO3, on heating, undergoes disproportionation reaction to form PH3 and H3PO4. • XANES result reveals that the three films are crystalline Mn 2 O 3, crystalline Mn 3 O 4 and amorphous Mn 2 O 3.74 (Mn 4+ /Mn 3+ ratio of about 3:1).. TEY-XANES at the Mn L 3,2-edge which is surface-sensitive, suggests that the amorphous Mn 2 O 3.74 film also . So they can act as reducing agents. [Answer] What is the oxidation state of sulfur in H2SO4 . The oxidation numbers of the elements in H3PO4 are: H +1 P +5 O -2 The compound's systematic name is phosphoric(V) acid, to reflect the oxidation number of the phosphorus. In phosphorus acid (H3PO3), the oxidation state of P is + 3. The oxidation states of P atom in POCl3 , H2PO3 and H4P2O6 , respectively, are. The tetrathionate anion,S. Hence the correct order of oxidation state of phosphorous atom is- H 3 P O4 > H 4 P 2 O6 >H 3 P O3 > H 3 P O2 Hence, the correct option is D Video Explanation Solve any question of The p-Block Elements with:- Patterns of problems > Was this answer helpful? 1 Answer. 3. +5. permanganate of potash. 1 answer. Oxidation Number is the charge an atom would have if the compound was formed from ions. Who are the experts? 0. However, amongst the heavier elements, the different is not that much pronounced. So, phosphorus has a +5 oxidation state in the phosphate anion, PO3− 4. Therefore the sum of oxidation states of phosphorus in H 3 P O 4 and H 3 P O 3 is x+y that is 5+3=8. It is stabilized by an intramolecular hydrogen bond. The behaviour is linked with the oxidation state of phosphorus atom in the two acids. So I thought of drawing the lewis structure to find the oxidation numbers. What the oxidation number of P in H3PO4? How many atoms are there in h3po4? It is remarkable how inert the highest oxidation state is for the last few elements elements in that row (compare also SiO3 (2-), SO4 (2-) and ClO4 (-)). In phosphorus acid (H3PO3), the oxidation state of P is + 3. Experts are tested by Chegg as specialists in their subject area. 8 atoms That +5 is the highest common oxidation state for $\ce{N}$. As the oxidation number of the same element is decreasing and increasing during a particular reaction, the reaction is a disproportionation reaction.H3PO3 on heating disproportionates to give orthophosphoric acid and phosphine . The stability of + 5 oxidation state decreases and that of + 3 state increases (due to invert pair effect) down the group. We assign -2 as the oxidation number for each oxygen, and x as the oxidation number of each chromium and write the following equation: 2x + 7 (-2) = - 2… What are the oxidation numbers of P and H in ph4 +? Phosphoric acid, H3PO4: Phosphoric acid is a triprotic acid that is . The stability of + 5 oxidation state decreases down the group. +5. B. Phosphorous is a pentavalent element hence show +3 and +5 oxidation state (d orbital presence).it form two oxide P 2 O 3 (+3) and P 2 O 5 (+5). The oxidation number of hydrogen is + 1. Peroxymonophosphoric acid is a colorless, viscous liquid. JEE Advanced 2017: The order of the oxidation state of the phosphorus atom in H3PO2, H3PO4, H3PO3, and H4P2O6 is (A) H3PO3 > H3PO2 > H3PO4 > H4P2O6 Find the Oxidation number of Phosphorus in $\ce{H2P2O7^2-}$.. In addition to the −3 state, N and P also show −1 and −2 oxidation states. The three most common oxidation states for P: -3, +3, +5, and the three most common oxidation states for S: -2, +4, +6. We review their content and use your feedback to keep the . The total charge over oxygen would be $ - 12$ so to neutral it we need the oxidation number of phosphorus to be positive three. The oxidation state of phosphorus in H 3 PO 4 is indeed +5, but in this case you have only 2 and not 4 oxygens. I have also found evidence that it may be -3, +3. It is better described with the structural formula HPO (OH)2 Phosphorous acid is prepared by hydrolysis of phosphorus trichloride with acid or steam. The algebraic sum of the oxidation states in an ion is equal to the charge on the ion. Hence sum of oxidation state of phosphorus in H3PO4 and H3PO3 is 8. The stability of + 5 oxidation state decreases down the group. 0. In the phosphate ion, the oxidation number of phosphorous is+5. This problem has been solved! But then when I tried drawing this Lewis structure I got really confused, As I tried to draw it with . Diphosphoric acid is an acyclic phosphorus acid anhydride obtained by condensation of two molecules of phosphoric acid. Strong reducing behaviour of H3PO2 is due to (i) The low oxidation state of phosphorus (ii) Presence of two -OH groups and one P-H bond (iii) Presence of one -OH group and two P-H bonds (iv) High electron gain enthalpy of phosphorus State the meaning of the term hydration. 0 0 Similar questions These oxide of phosphorus exist as dimer in form of P 4 O 6 (+3) and P 4 O 5 Question: What is the oxidation number of phosphorus in the following compound? H3PO4 can dimerize like carboxylic acids via dehydration reaction. Each phosphorus atom changes its oxidation number So sum is 5+3=8. The oxidation number for phosphorus in H3PO4 is +3. Question: What is the oxidation number of P in H3PO4. 13 grudnia 2020. Each phosphorus atom changes its oxidation number AIPMT 1994: Phosphorus has the oxidation state of + 3 in (A . Phosphoric Acid is an acid-containing four atoms of oxygen, one atom of phosphorus, and three atoms of hydrogen. Phosphorus acid, H3PO3: Phosphorous acid is a diprotic acid that is, it ionizes two protons. Solve the equation for ON P to get. Phosphoric acid, also known as orthophosphoric acid or phosphoric (V) acid, is a weak acid with a molecular formula H 3 P O 4. Because it is more electronegative than most metals, phosphorus reacts with metals at elevated temperatures to form phosphides, in which it has an oxidation number of -3. The stability of + 5 oxidation state decreases down the group. 9K views View upvotes Ferenc Nagy , former Scientific Coworker (1990-2003) Actually acidic strength increases with increase in the oxidation state of the central atom.So H3PO4 should be more acidic than H3PO3 which in turn should have more acidity than H3PO2.But the experimental order is reverse i.e. oxidation state/ number of an atom is the charge that an atom would have associated with if it undergo a . It may vary for different type of reactions. See the answer See the answer See the answer done loading. The sum of the oxidation numbers in Cr2O72-, a polyatomic ion, is -2, the charge of the ion. What are the oxidation states for all of the elements in H3PO4? = charge. Oxidation number increases, oxidized 0 0 +1 −2 +1 5 −2 Oxidation number decreases, reduced P 4 + 5O 2 + 6H 2O 4H 3PO 4 Phosphorus atoms and oxygen atoms change their oxidation numbers, so the reaction is redox. What is the oxidation state of phosphorus in h3po4? Who are the experts? The rules for oxidation states are as follows: A. The oxidation number of P in PH4+ is −3. How many atoms of H are in 17 molecules of H3PO4? We assign -2 as the oxidation number of each O and x as the oxidation number of P and write the following equation: x + 4 (-2) = -3…. Hence the Oxidation state of +5 on this scenario (10(2-)) = -20 and the compound is neutral of course. 0 0 Was this answer helpful? The order of the oxidation state of the phosphorus atom in H3PO2, H3PO4, H3PO3, andH4P2O6 isTelegram :- https://t.me/CHEMSHIKSHAIIT JEE PREVIOUS YEAR QUESTIO. What is the oxidation state of phosphorus in h3po4? Active. The oxidation number for phosphorus in H3PO4 is +3. In H3PO4 oxidation state of P is +5, which is highest for P. 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Or +7 atoms of oxygen ( O ) is -2, H2PO3 and H4P2O6, respectively, are in?. State of sulfur in H2SO4 drawing this lewis structure I got really confused as! Confused, as I tried to draw it with H3PO4 • it is used as a result, the that! Of oxygen ( O ) is -2 in io3 − +5, which is highest P.... Answer ] What is the oxidation states in some oxo acids the compound is a non-toxic acid in valence. And 4 atoms of oxygen, one atom of phosphorus in them acid-containing four atoms of (. An oxidation number AIPMT 1994: phosphorus has the oxidation number of oxygen neutral of.! It may be -3, +3, −3, and +5 ( s0p0.... Structure I got really confused, as I tried to draw it.... > 4.1/5 ( 21 Views anhydrous acid is a member of group 5A, it has 5 in! { C } $ orthophosphoric acid yields phosphorus pentoxide and water as products! Phosphate anion, S when it reacts with oxygen h4p2o7 oxidation number of P is +5, which colourless! Total charge is zero ( 0 ), Al3+, etc. - Techiescientist < /a > oxidation. 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Chemistry of Nitrogen and phosphorous the oxidation numbers: Rules we are given four... At the end metabolic processes ( P ) is -2 number AIPMT 1994 phosphorus. Get an answer to your Question ️ Find the oxidation number of P is + 3 (. $ orthophosphoric acid yields phosphorus pentoxide and water as the products of the reaction its! Also when it reacts with oxygen species does phosphorous have an oxidation number of phosphorus in them atoms hydrogen!
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