Đáp án:

Câu 23:

Các base gồm: $Mg(OH)_2, Ca(OH)_2, Zn(OH)_2, KOH, NaOH, Fe(OH)_2$ 

Câu 24:

$NaOH$: sodium hydroxide 

$KOH$: potassium hydroxide 

$Ba(OH)_2$: barium hydroxide 

$Cu(OH)_2$: copper(II) hydroxide 

$Mg(OH)_2$: magnesium hydroxide 

$Fe(OH)_3$: iron(III) hydroxide 

$Al(OH)_3$: aluminium hydroxide 

$Ca(OH)_2$: calcium hydroxide 

Câu 25:

Base tan: $KOH, NaOH, Ca(OH)_2, Ba(OH)_2$ 

Base không tan: Còn lại.