Question

17) Determine the oxidizing agent in the following reaction. Ni(s) + 2 AgClO4(aq) → Ni(ClO4)2(aq) + 2 Ag(s) A) Ag B) Ni C) CI D) O E) This is not an oxidation-reduction reaction. 

18) When an aqueous solution of manganese (II) nitrate is combined with an aqueous solution of ammonium sulfide, what should precipitate out? A) Mns B) Mn(SO3)2 C) Mn(SO4)2 D) Mn 2503 E) Mn 2504 

19) If 4.89 g of ZnCl2 is dissolved in enough water to give a total volume of 500 ml, what is the molarity of the solution? A) 0.217 M B) 0.0179 M C) 0.0717 M D) 1.33 M E) 0.849 M 

20) What element is undergoing oxidation (if any) in the following reaction? 2 MnO4- (aq) + 3 NO2(aq) + H2000 → 2 MnO2(s) + 3 NO3-(aq) + 2 OH-(aq) A) Mn B) O C) N D) H E) This is not an oxidation-reduction reaction 

21) What volume of 1.46 M CrBr2 solution is required to react with 50.0 mL of 0.210 M Na2CO3 solution? CrBrz(aq) + Na2CO3(aq) → CrCO3(s) + 2NaBr(aq) A) 139 mL B) 45.3 mL C) 7.19 mL D) 1.68 ml E) 34.6 mL

Answer 1

17.

Answer 2

17) the Ag is the oxidizing agent because its oxidation number moves from +1 to 0. And Ni is oxidised from 0 to+2

Answer 3

18.

In the reaction of manganese nitrate and ammonium sulfide, the precipitate formed is MnS

The reaction is :-

Mn(NO3)2 + (NH4)2S -> MnS + 2NH4(NO3).