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For a simple ion, like Pb in PbSO4, it is the same as the ionic charge, ie +2. You are correct that oxidation is the loss of electrons and reduction is the gaining of electrons. +1 +3 0-1 +2 +1. Pb PbO2 PbSO4 H2O H2SO4. Oxidation number pbso4 Therefore, the oxidation number of S in PbSO4 is +6. PbSO4 --> Pb2+ + SO4 2- (A net dissociation reaction of the salt) SO4 has an oxidation number of -2. Pb +2 S-2 + H +1 2 O-1 2 → Pb +2 S +6 O-2 4 + H +1 2 O-2 . It is suggested that a precipitation mechanism to form PbSO 4 occurs under some conditions prior to the solid state … Within polyatomic ions, you can frequently have oxidation states that are not "normal". 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) Which substance is the reducing agent in the following reaction? gsplcu gsplcu Answer: The central atom is S. Explanation: Look at the structure. Identify which reactants are being oxidized (the oxidation number increases when it reacts) and which are being reduced (the oxidation number goes down). Pb. The system is compared with measurements on Pb(Hg) in H 2 SO 4 and with Pb(Hg), Hg, solid Pb in HClO 4 solution. What is the oxidation number of phosphorous in the H3PO2 molecule? The total should equal when you add all oxidation numbers: Pb + (-2) = 0 ----> Pb = +2. 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. 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). Therefore x+6-8=0. Since the ion has a -2 charge, the oxidation state of sulfur must be +6. Pb +2 S -2 + H +1 2 O -1 2 → Pb +2 S +6 O … Sum of all oxidation number =0. Explanation: The oxidation number of S in P b S O 4 = 6. How to calculate oxidation number of Pb in PbSO4?And Explain? Asked by | 25th Mar, 2009, 06:56: PM. Expert Answer: Let the oxidation number of Pb=x. Oxidation number of S=+6. Fe2S3 + 12HNO3 → 2Fe(NO3)3 + 3S + 6NO2 + 6H2O Oxidation number of O=-2. Oxidation number of Pb is +2 So, SO42- can be dealt with on its own. Conversion of P b S O 4 to P b S is : A. reduction of S. B. oxidation of S. C. dissociation. Within the sulfate ion, each oxygen does have a -2 oxidation state. H in H2 : 0. 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. Therefore oxidation number of Pb is +2. Nice I mean I kinda said the answer in his question Now, since O is always -2, the S must be +6 to make the whole compound zero. Pb in PbSO4 : +2. H2O2 + PbS --> PbSO4 + H2O. Thank me later Shaawana is waiting for your help. MEDIUM. A compound doesn't have an oxidation number, but an element in a compound does. b) Identify and write out all redox couples in reaction. Answer. Conversion of PbSO4 to PbS ... chemistry. THat leaves, though, the oxidation state of Pb to be +2. I don't think that you have written the formula of the calcium compound correctly. D. none of these.