Chemistry · Some Basic Concepts of Chemistry (Mole Concept) + Stoichiometry

JEE Main 2024 — 8 April, Shift 2 — Question 86

A solution is prepared by adding 1 mole ethyl alcohol in 9 mole water. The mass percent of solute in the solution is $\_\_\_\_$ (Integer answer).

[Given: Molar mass in $\mathrm{g\ mol^{-1}}$ — Ethyl alcohol: 46, Water: 18]

Answer: 22

Numerical answer — enter this value.

Mass of ethyl alcohol $= \mathrm{1 \times 46 = 46\ g}$

Mass of water $= \mathrm{9 \times 18 = 162\ g}$

Total mass of solution $=\mathrm{208\ g}$

Mass percent of solute (alcohol) $=\frac{\text { Mass\; of \;ethyl \;alcohol }}{\text { Total \;mass\; of\; solution }} \times 100$

Mass percent of solute $= \mathrm{\frac{46}{208} \times 100 = 22.1\%}$

Thus, the integer answer is $22$ .

Answer key and solution verified before publishing.

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