Question

Which one of the following relationships is true in water at 25°C?
A. [H] [HD]
B. [OH] = [1,0)
C. K >x 10
D. (H') - (OH)​

Answer 1

Answer:

D

Explanation:

at 25°c concentration of H+ion is =concentration of OH-ion

Answer 2

OPTION (D) IS CORRECT

(D) $[H^{+} ]=[OH^{-} ]$

Explanation:

• Pure water is neutral i.e., it is neither acidic nor basic. It dissociates into hydrogen and hydroxide ions. They are in equilibrium with water.

       $H_{2} O$⇄$H^{+} +OH^{-}$

• At room temperature water contains equal concentrations of both hydrogen and hydroxide ions.
• The ionic product of water is $10^{-14}$.
• The concentrations of $[H^{+} ],[OH^{-} ]$ are equal to $10^{-7}$.
• Therefore option (D) is correct.