Expert Answer: Let the oxidation number of Pb=x. The total should equal when you add all oxidation numbers: Pb + (-2) = 0 ----> Pb = +2. Asked by | 25th Mar, 2009, 06:56: PM. Within polyatomic ions, you can frequently have oxidation states that are not "normal". PbSO4 --> Pb2+ + SO4 2- (A net dissociation reaction of the salt) SO4 has an oxidation number of -2. Add your answer and earn points. Identify the substance oxidised, reduced, oxidising agent and reducing agent for each of the following reactions: Pb(s) + PbO 2 (s) + 2H 2 SO 4 (aq) → 2PbSO 4 (s) + 2H 2 O(l) gsplcu gsplcu Answer: The central atom is S. Explanation: Look at the structure. You are correct that oxidation is the loss of electrons and reduction is the gaining of electrons. A compound doesn't have an oxidation number, but an element in a compound does. Answer. Conversion of P b S O 4 to P b S is : A. reduction of S. B. oxidation of S. C. dissociation. H in H2 : 0. Thank me later Shaawana is waiting for your help. Pb. What is the oxidation number of phosphorous in the H3PO2 molecule? It is suggested that a precipitation mechanism to form PbSO 4 occurs under some conditions prior to the solid state … How to calculate oxidation number of Pb in PbSO4?And Explain? Which substance is the reducing agent in the following reaction? Oxidation number of O=-2. Therefore oxidation number of Pb is +2. Since the ion has a -2 charge, the oxidation state of sulfur must be +6. H2O2 + PbS --> PbSO4 + H2O. Pb PbO2 PbSO4 H2O H2SO4. Fe2S3 + 12HNO3 → 2Fe(NO3)3 + 3S + 6NO2 + 6H2O The anodic oxidation of solid Pb in H 2 SO 4 to form PbSO 4 has been investigated by rotating disc, potentiostatic pulse and ac impedance measurements. Explanation: The oxidation number of S in P b S O 4 = 6. So, SO42- can be dealt with on its own. Now, since O is always -2, the S must be +6 to make the whole compound zero. Identify which reactants are being oxidized (the oxidation number increases when it reacts) and which are being reduced (the oxidation number goes down). Conversion of PbSO4 to PbS ... chemistry. Oxidation number (also called oxidation state) is a measure of the degree of oxidation of an atom in a substance (see: Rules for assigning oxidation numbers). MEDIUM. Pb in PbSO4 : +2. Oxidation number of S=+6. Sum of all oxidation number =0. Pb +2 S -2 + H +1 2 O -1 2 → Pb +2 S +6 O … If you consider oxidation as the loss of electrons and gain of oxidation number, and reduction as the gain of electrons and decrease in oxidation number, the oxidation states are as follows: Pb : 0 (Elementary state) H in H2SO4 : +2. D. none of these. +1 +3 0-1 +2 +1. Oxidation number of Pb is +2 For a simple ion, like Pb in PbSO4, it is the same as the ionic charge, ie +2. Nice I mean I kinda said the answer in his question Therefore x+6-8=0. 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