WAEC - Chemistry (2020 - No. 34)
Which of the following hydroxides is not readily soluble in water?
NH\(_4\)OH
Ca(OH)\(_2\)
NaOH
KOH
Explicaţie
-The hydroxides of sodium, potassium, and ammonium are very soluble in water. The hydroxides of calcium and barium are moderately soluble.