Kw = 1 x 10-14 at 25°C. Justify this statement.

1.	Kw = 1 x 10-14 at 25°C. Justify this statement.
Answer» 1. Experimentally found that the concentration of H₃O in pure water is 1 x 10^-7 at 25°C. 2. Since the dissociation of water produces equal number of H₃O₄ and OH^- , the concentration of OH^- is also equal to 1 x 10^-7 at 25°C. The ionic product of water at 25°C is K_w = [H₃O⁺] [OH^-] = [1 x 10^-7] [1 x 10^-7] K_w = [1 x 10^-14]

Answer»

1. Experimentally found that the concentration of H₃O in pure water is 1 x 10^-7 at 25°C.

2. Since the dissociation of water produces equal number of H₃O₄ and OH^- , the concentration of OH^- is also equal to 1 x 10^-7 at 25°C. The ionic product of water at 25°C is

K_w = [H₃O⁺] [OH^-]

= [1 x 10^-7] [1 x 10^-7]

K_w = [1 x 10^-14]

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Kw = 1 x 10-14 at 25°C. Justify this statement.

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