Answer
Polyhydroxy bases are specific bases that are capable of losing more than a single hydroxide group per molecule in acid-base reactions. In other words, polyhydroxy bases have more than one ionizable $OH^-$ group per molecule. Examples of such bases are:
1. magnesium hydroxide - $Mg(OH)_{2}$
2. calcium hydroxide - $Ca(OH)_{2}$
3. barium hydroxide - $Ba(OH)_{2}$
4. aluminum hydroxide - $Al(OH)_{3}$
5. zinc hydroxide - $Zn(OH)_{2}$
Work Step by Step
Polyhydroxy bases are specific bases that are capable of losing more than a single hydroxide group per molecule in acid-base reactions. In other words, polyhydroxy bases have more than one ionizable $OH^-$ group per molecule. Examples of such bases are:
1. magnesium hydroxide - $Mg(OH)_{2}$
2. calcium hydroxide - $Ca(OH)_{2}$
3. barium hydroxide - $Ba(OH)_{2}$
4. aluminum hydroxide - $Al(OH)_{3}$
5. zinc hydroxide - $Zn(OH)_{2}$