Question

Why sodium hydeoxide is used as a strong base than potassium hydroxide?

Answer 1

Sodium is less electronegative than Potassium, thus sodium hydroxide is more willing to release the hydroxy group and is the stronger base. They have no ability to attract or donate protons ($H^{+}$). $OH^{-}$ is a strong base because on meeting any available $H^{+}$ it will form water. An alkoxide ion such as ${C{H}_{3}O}^{-}$ will attract $H^{+}$ more strongly than $OH^{-}$, so it is a stronger base.

Hence sodium hydroxide which gives $OH^{-}$ ions easily then potassium hydroxide, is stronger.

Answer 2

$your \: answer$
we know that bases when dissolved in water furnishes oh- ions on water now looking at naoh and Koh naoh furnishes better oh- and easily in water as compared to Koh hence we can conclude that it is a strong base though they both are strong base

hope helps