JEE Mains · Chemistry · STD 12 -1. Solution and colligative properties
A \(100\, mL\) solution was made by adding \(1.43\, g\) of \(Na _{2} CO _{3} \cdot xH _{2} O .\) The normality of the solution is \(0.1\) \(N.\) The value of \(x\) is.......... (The atomic mass of \(Na\) is \(23\, g / mol\) ) :
- A \(10\)
- B \(5\)
- C \(8\)
- D \(12\)
Answer & Solution
Correct Answer
(A) \(10\)
Step-by-step Solution
Detailed explanation
Molar mass of \(Na _{2} CO _{3} \cdot xH _{2} O\) \(\Rightarrow 23 \times 2+12+48+18 x\) \(\Rightarrow 46+12+48+18 x\) \(\Rightarrow(106+18 x )\) \(Eqwt =\frac{ M }{2}=(53+9 x )\) As \(n _{\text {factor }}\) in dissolution will be determined from net cationic or anionic charge;…
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