25.3 g of sodium carbonate, is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ions, and carbonate ions, respectively are (Molar mass of )

Question

25.3 g of sodium carbonate, $N a_{2} C O_{3}$ is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ions, $(N a^{+})$ and carbonate ions, $(C O_{3}^{2 -})$ respectively are (Molar mass of $N a_{2} C O_{3} = 106 g m o l^{- 1}$ )

Smart Achievers · Accepted Answer

(2)

$M = \frac{25.3}{106} \times \frac{1000}{250} = 0.9547 = 0.955 M$

$[N a^{+}] = 1.910 {[C O_{3}]}^{2 -} = 0.955$

Solution

1 0.955 M and 1.910 M

2 1.910 M and 0.955 M

3 1.90 M and 1.910 M

4 0.477 M and 0.477 M

Ans.
(2)

$M = \frac{25.3}{106} \times \frac{1000}{250} = 0.9547 = 0.955 M$

$[N a^{+}] = 1.910 {[C O_{3}]}^{2 -} = 0.955$

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