Complete Theory

Worked Examples

Example 1Calculating Kc from equilibrium concentrations

Example 2pH of strong acid and weak acid

Exercise 1pH of strong acidMedium

📋 Problem to solve

Calculate the pH of a 0.025 M solution of HNO₃.

📌 Given data

[HNO₃] = 0.025 M, strong acid

Exercise 2pH of weak baseMedium

📋 Problem to solve

Calculate the pH of a 0.050 M NH₃ solution (

K_b = 1.8\times10^{-5}

📌 Given data

[NH₃] = 0.050 M

K_b = 1.8\times10^{-5}

Exercise 3Kc from partial pressuresHard

📋 Problem to solve

For

\mathrm{2SO_2 + O_2 \rightleftharpoons 2SO_3}

, at 700 K the equilibrium partial pressures are:

P_{SO_2}=0.20

atm,

P_{O_2}=0.10

atm,

P_{SO_3}=0.40

atm. Calculate

K_p

and

K_c

📌 Given data

P_{SO_2} = 0.20

atm

P_{O_2} = 0.10

atm

P_{SO_3} = 0.40

atmT = 700 K

📚

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