hypochlorous-acid-hocl-is-produced-when-chlorine-gas-cl2-dissolves-in-water-cl2-

Question

Hypochlorous acid (HOCl) is produced when chlorine gas (Cl₂) dissolves in water:

Cl₂(g) + H₂O(l) ⇌ HOCl(aq) + HCl(aq)

The solubility of chlorine in water at 30 °C is 0.576 g/100 mL. Calculate the pH and the concentrations of all species (H₃O⁺, OH^–, HOCl, OCl^–, and Cl^–) in a saturated chlorine solution at this temperature. Assume that all chlorine reacts with water. (K_a of HOCl = 2.95×10^–8)

Accepted Answer

[H₃O⁺] = 0.0812 M

[OH^–] = 1.23×10^–13 M

[HOCl] = 0.0812 M

[OCl^–] = 2.95×10^–8 M

[Cl^–] = 0.0812 M

pH = 1.090

Answer

[H₃O⁺] = 0.0775 M

[OH^–] = 1.23×10^–13 M

[HOCl] = 0.0847 M

[OCl^–] = 2.95×10^–8 M

[Cl^–] = 0.0812 M

pH = 1.117

Answer

[H₃O⁺] = 0.0775 M

[OH^–] = 1.23×10^–13 M

[HOCl] = 0.0847 M

[OCl^–] = 2.12×10^–8 M

[Cl^–] = 0.0873 M

pH = 1.883

Answer

[H₃O⁺] = 0.0975 M

[OH^–] = 4.23×10^–13 M

[HOCl] = 0.0847 M

[OCl^–] = 2.12×10^–8 M

[Cl^–] = 0.0873 M

pH = 1.883

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