CUET · CHEMISTRY · PYQ PAPER 2023
To prepare \(2 5 0 ~ m L\) standard solution of \(M / 2 0 ~ N a C l\), amount of NaCl required is :
- A 7.3 g
- B 0.73 g
- C 0.073 g
- D 73 g
Answer & Solution
Correct Answer
(B) 0.73 g
Step-by-step Solution
Detailed explanation
\(M_w(\text{NaCl}) = 22.99 + 35.45 = 58.44 \text{ g/mol}\) \(\text{Moles} = \text{Molarity} \times \text{Volume} = \frac{1}{20} \text{ mol/L} \times 0.250 \text{ L} = 0.0125 \text{ mol}\)…
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