AP EAMCET · Chemistry · Some Basic Concepts of Chemistry
Find the molarity of the 5 molal urea solution, whose density is \(1.3 \mathrm{~g} / \mathrm{mL}\) (given, molecular weight of urea is \(60.06 \mathrm{~g} / \mathrm{mol}\) )
- A \(>5 \mathrm{M}\)
- B \(=5 \mathrm{M}\)
- C \( < 5 \mathrm{M}\)
- D Can't be predicted
Answer & Solution
Correct Answer
(B) \(=5 \mathrm{M}\)
Step-by-step Solution
Detailed explanation
5 molal urea solution \((d=1.3 \mathrm{~g} / \mathrm{mL})\) \(1 \mathrm{~kg}\) of solvent contains 5 moles of urea. Means \(1000 \mathrm{~g}\) water contains \(300 \mathrm{~g}\) of urea. Molarity of \(1300 \mathrm{~g}\) urea solution contains \(300 \mathrm{~g}\) urea will be…
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