AP EAMCET · Chemistry · Some Basic Concepts of Chemistry
If \(50 \%\) of \(1 \mathrm{M} \mathrm{Na}_2 \mathrm{SO}_4\) is dissociated in aqueous solution of density \(1.2 \mathrm{~g} \mathrm{~mL}^{-1}\), what is the molality of \(\mathrm{Na}^{+}\)ion in the solution?
- A 0.95
- B 1.89
- C 1
- D 2
Answer & Solution
Correct Answer
(A) 0.95
Step-by-step Solution
Detailed explanation
Density (d) of solution \(=1.2 \mathrm{~g} / \mathrm{ml}\) \[ \underset{1 \mathrm{~mol}}{\mathrm{Na}_2 \mathrm{SO}_4} \longrightarrow \underset{2 \mathrm{~mol}}{2 \mathrm{Na}^{+}}+\mathrm{SO}_4^{2-} \] MW of \(\mathrm{Na}_2 \mathrm{SO}_4=142 \mathrm{~g} / \mathrm{mol}\)…
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