First slide

13th group or boron group

Question

Aluminum liberates di hydrogen gas with both dilute $H C l$ and aqueous $N a O H$ , the volume ratio of di hydrogen gas evolved from equal amounts of aluminum in these reactions is ____

Moderate

A

1:2
B

2:3
C

1:3
D

1:1

Solution

Following are the chemical reaction of amphoteric aluminum.
$2 A l + 6 H C l \to 2 A l C l_{3} + 3 H_{2}$
$2 A l + 2 N a O H + 6 H_{2} O \to 2 N a [A l {(O H)}_{4}] + 3 H_{2} ↑ \overset{- H_{2} O}{\to} 2 N a A l O_{2}$
From stoichiometry, we can see that we will obtain same moles of $H_{2}$

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