Question

Which one of the following relationships is true in water at 25ºC?

Answer 1

Answer:

At room temperature water contains equal concentrations of both hydrogen and hydroxide ions. The ionic product of water is . The concentrations of are equal to . Therefore option (D) is correct

Answer 2

Answer:

Relationships is true in water at $25$ºC is [H+] = [OH-]

Explanation:

In pure water, the concentrations of hydrogen ions and hydroxyl ions are equal. As a result, water is neither acidic nor basic, but rather neutral.

At $25$ °C, pure water has a concentration of $55.5$ H+ and OH- ions are ionised to a minor extent. Electrical conductivity measurements show that the equilibrium constant (also known as the dissociation constant) is $1.8 10-$$16$ M at $25$°C. When the temperature of the water is raised, the equilibrium returns to a lower temperature. This would be accomplished by absorbing the extra heat.