Indicate whether the following balanced equations involve oxidation-reduction. C

Question

Indicate whether the following balanced equations involve oxidation-reduction. Check all that apply. NaI(ag) + 3 HOCl(ag) rightarrow NaIO_3(ag) + 3 HCI(aq) 3 SO_2(g) + 2HNO_3(ag) + 2 H_2O(l) rightarrow 3 H_2SO_4(ag) + 2 NO(g) PBr_3(l) + 3H_2O(l) rightarrow H_3PO_3(ag) + 3 HBr(ag) Part B Identify the elements that undergo changes in oxidation number in the reaction NaI(ag) + 3 HOCI(aq) rightarrow NaIO_3(ag) + 3 HCl(ag). Express your answers as chemical symbols separated by a comma. Part C Identify the elements that undergo changes in oxidation number in the reaction 3 SO_2(g) + 2HNO_3(ag) + 2 H_2O(l) rightarrow 3 H_2SO_4(ag) + 2 NO(g).

Explanation / Answer

Part B)

NaI(aq) + 3HOCl(aq) = NaIO3(aQ) + 3HCl(aQ)

elements which undergo oxidation number change..

Na+1 --> Na+1

I-1 --> IO3 = -1

O3 = -3*2 = -6

I = +5

I goes from -1 to +5

also

OCl = -1

Cl = +1

to -1

answer is I and Cl

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