First slide

Atomic and physical properties

Question

Precipitation of ${Al}^{3 +} (aq) as Al {(OH)}_{3} by {CO}_{2}$ shows that

Moderate

A

the acidic property is very weak
B

the acidic property is very strong
C

the basic property is very strong
D

the basic property is very weak

Solution

${CO}_{2} + H_{2} O ⇌ {CO}_{3}^{2 -} + 2 H^{+} 2 {Al}^{3 +} + 3 {CO}_{3}^{2 -} + 3 H_{2} O \overset{}{\to} 2 Al {(OH)}_{3} + 3 {CO}_{2}$

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