Question

The pH of a soft drink is 3.82. Its hydrogen ion concentration will be ………

(a) 1.96 x 10^-2 mol / L 

(b) 1.96 x 10^-3 mol / L 

(c) 1.5 x 10^-4 mol / L 

(d) 1.96 x 10^-1 mol / L

Answer 1

(c) 1.5 x 10^-4 mol / L 

pH = 3.82 = – log₁₀ [H⁺] 

∴ [H⁺] = 1.5 x 10^-4 mol / litre