Question

pH of aqueous of sodium borate is

• A. > 7
• B. 6 > 7
• C. 7
• D. < 7

Answer 1

Answer: (A)

Sodium borate $\left(N{a}_{3}B{O}_3\right)$ is the salt of weak acid and strong base. On hydrolysis sodium borate give $NaOH$ and $H_{3}B{O}_3$.

As $NaOH$ is strong base, it remains ionised upto greater extent. Thus, the solution becomes basic hence, $pH$ of solution is greater than seven, ie, $pH>7$.