Question

Write an equilibrium expression for each chemical equation involving one or more solid or liquid reac- tants or products.

Part A:

HCHO2(aq)+H2O(l)⇌

H3O+(aq)+CHO−2(aq)

Use A for [HCHO2], B for [H2O], C for [H3O+], D for [CHO−2].

Part B:

CO2−3(aq)+H2O(l)⇌HCO−3(aq)+OH−(aq)

Use A for [CO2−3], B for [H2O], C for [HCO−3], D for [OH−].

Part C:

2C(s)+O2(g)⇌2CO(g)

Use A for [C], B for [O2], C for [CO].

Part D:

C(s)+CO2(g)⇌2CO(g)

Use A for [C], B for [CO2], C for [CO].

Answer 1

before writing equilibrium expression remember one point that

solids and pure liquids we have to ignore

lets see the definition of equilibrium expression

The equilibrium expression is equal to the concentration of each product raised to its coefficient in a balanced chemical equation and multiplied together, divided by the concentrat ion of the product of reactants to the power of their coefficients

PartA

Keq = [C][D] / [A]

Part B

Keq = [C][D] / [A]

Part C

Keq = [C]² / [B]

Part D

Keq = [C]² / [B]