Question

At a certain temperature, the value of $p{K}_w$ is 13.4 and the measured pH of solution is 7. The solution is

• A. Acidic
• B. Basic
• C. Neutral
• D. Unpredicatble

Answer 1

The correct option is B Basic

$K_w=\left[H^{+}\right]\left[O{H}^{-}\right]=13.4$

In neutral water, $\left[H^{+}\right]=\left[O{H}^{-}\right]$

So, pH of neutral water = 6.7

So, the solution with pH higher than 6.7 will be basic in nature and solution with pH less than 6.7 will be acidic in nature.