AP EAMCET · Chemistry · Some Basic Concepts of Chemistry
If the mole fraction of ethanol in a solution of ethanol in water is 0.050 , then find the molarity of the given solution.
- A \(3.5 \mathrm{M}\)
- B \(2.8 \mathrm{M}\)
- C \(1.7 \mathrm{M}\)
- D \(0.95 \mathrm{M}\)
Answer & Solution
Correct Answer
(B) \(2.8 \mathrm{M}\)
Step-by-step Solution
Detailed explanation
Moles of ethanol \(=0.050\) Moles of water \(=1-0.050=0.95 \mathrm{~mol}\). Mass of ethanol \(=0.05 \times 46=2.3 \mathrm{~g}\). Mass of \(\mathrm{H}_2 \mathrm{O}=0.95 \times 18=17.1 \mathrm{~g}\) Mass of solution \(=2.3+17.1 \mathrm{~g}=19.4 \mathrm{~g}\) Assuming, density of…
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