Question

For the following chemical system at equilibrium, choose whether the concentration of Zn2+ increases, decreases, or...

For the following chemical system at equilibrium, choose whether the concentration of Zn2+ increases, decreases, or stays the same for each of the below separate changes to the system. (8 points)

16 H+(aq) + 2 MnO4-(aq) + 5 Zn(s) ↔ 2 Mn2+(aq) + 8 H2O(l) + 5 Zn2+(aq)

pH is increased by the addition of a strong base

Zn solid is added to the reaction mixture

Water is added to the reaction mixture.

Mn2+ions are added to the reaction mixture as Mn(NO3)2.

How do you figure this out? details please

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Answer #1

16 H+(aq) + 2 MnO4-(aq) + 5 Zn(s) ↔ 2 Mn2+(aq) + 8 H2O(l) + 5 Zn2+(aq)

If you increase the concentration of Zn+2 then products concentration increases so the reaction shifts to left side Hence equilibrium shifts to left side.

If you add Zn solid then the reactants concentration increases then the reaction shifts to right side Hence equilibrium shifts to right side.

If you add H2O to reaction then products concentration increases then the reaction shifts to leftside Hence equilibrium shifts to left side.

If you add Mn+2 ions added to reaction mixture then products concentration increases then the reaction shifts to left side Hence equilibrium shifts to left side.

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