This is acid-base equilibrium and redox reaction unit, please show all detailed

Question

This is acid-base equilibrium and redox reaction unit, please show all detailed work, thank you! For AgC2Hs02 salt, write a balanced equation showing the solubility equilibrium, write the solubility product expression, and determine the mass that dissolves in 375 mL of water at 25 °C. (for AgC2H302, Ksp 1.94*10-3) 3. Which of the following are redox reactions? Explain why and show your calculation. (a) HBr(g)-H2O(I) H30.(aq) + Br(aq) (b) 2 Fe?"(aq) + H2O2(aq) 2 Fe3 +(aq) 2 OH-(aq) (c) Fe (aq) 2 OH(aq) Fe(OH)2(s) (d) 2 CH30H(I) + 3 Odg) 2 CO2(g) + 4 H2O(1) (e) N2(g) + 3 H2(g) 2 NH3(g) 4.

Explanation / Answer

3)

AgC2H3O2 (aq) + H2O (l) <-----------------> Ag+ (aq) + C2H3O2- (aq)

Ksp = [Ag+] [C2H3O2-]

Ksp   = 1.94 x 10^-3

1.94 x 10^-3   = S x S

S = 0.0439 M

molar solubility = 0.0439 M

this means    0.0439 moles present in 1 litre

                     0.0439 x 166.91 g = (7.333g) present in 1 litre

1 litre --------------------> 7.333 g

375 mL --------------> ??
mass = 7.333 x 375 / 1000 = 2.75 g

mass of compound dissolved = 2.75 g

4)

answer : b , d , e are redox reactions

b) Fe +2 ----------------> Fe+3 oxidation

   H2O2 ----------------> OH-   reduction

    (-1)                          (-2) -------------> oxygen oxidation state

e)   N2 ----------------> NH3

     0                              -3            oxidation state of N

    H2 -------------------- NH3 oxidation reaction

    0                             +1                oxidation state of H

                 

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