Question:
What is the mass of ethanoic acid required to prepare $0.5\,m$ solution containing $100\,g$ of water? (Molar mass of ethanoic acid = $60\,g\,mol^{-1}$)
What is the mass of ethanoic acid required to prepare $0.5\,m$ solution containing $100\,g$ of water? (Molar mass of ethanoic acid = $60\,g\,mol^{-1}$)
Show Hint
Molality uses kg of solvent, not solution.
Updated On: Apr 24, 2026
- 3 g
- 6 g
- 0.3 g
- 7.5 g
- 2 g
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Concept:
\[
m = \frac{\text{moles of solute}}{\text{kg of solvent}}
\]
Step 1: Convert solvent
\[ 100g = 0.1\,kg \]
Step 2: Find moles
\[ 0.5 = \frac{n}{0.1} \Rightarrow n = 0.05 \]
Step 3: Mass
\[ \text{Mass} = 0.05 \times 60 = 3g \] Final Conclusion:
Option (A)
Step 1: Convert solvent
\[ 100g = 0.1\,kg \]
Step 2: Find moles
\[ 0.5 = \frac{n}{0.1} \Rightarrow n = 0.05 \]
Step 3: Mass
\[ \text{Mass} = 0.05 \times 60 = 3g \] Final Conclusion:
Option (A)
Was this answer helpful?
0
0
Top KEAM Chemistry Questions
- The pH of a solution obtained by mixing 60 mL of 0.1 M BaOH solution at 40m of 0.15m HCI solution is
- $4\, g$ of copper was dissolved in concentrated nitric acid. The copper nitrate solution on strong heating gave $5\, g$ of its oxide. The equivalent weight of copper is :
- Green chemistry deals with
- Neopentyl bromide undergoes dehydrohalogenation to give alkenes even though it has no $\beta$- hydrogen. This is due to
- Plot of $ log\text{ }x/m $ against log $p$ is a straight line inclined at an angle of $ 45{}^\circ $ . When the pressure is $ 0.5 \,arm $ and Freundlich parameter. $ k $ is $ 10 $ , the amount of solute adsorbed per gram of adsorbent will be $ (log\text{ }5=0.6990) $
View More Questions
Top KEAM Types of Solutions Questions
- The hardness of water sample containing $ 0.002 $ mole of magnesium sulphate dissolved in a litre of water is expressed as
- The density of \( 3\,M \) aqueous solution of a solute \( X \) is \( 1.86\,\text{g mL}^{-1} \). The molality of the solution is (Molar mass of solute \( X \) is \( 120\,\text{g mol}^{-1} \))
- Which of the following solvent has highest value of molal elevation constant \( K_b \)?
- Find the mass of an organic compound of molar mass 84, required to prepare 250 ml solution of molarity 0.4
- 3 g of benzoic acid is added to 25 g of benzene. \( \Delta T_f = 2.5\,\text{K} \) and \( K_f \) of benzene is 5. What is the experimental molecular mass of benzoic acid?
View More Questions
Top KEAM Questions
- i.$\quad$ They help in respiration ii.$\quad$ They help in cell wall formation iii.$\quad$ They help in DNA replication iv. $\quad$They increase surface area of plasma membrane Which of the following prokaryotic structures has all the above roles?
- A body oscillates with SHM according to the equation (in SI units), $x = 5 cos \left(2\pi t +\frac{\pi}{4}\right) .$ Its instantaneous displacement at $t = 1$ second is
- The pH of a solution obtained by mixing 60 mL of 0.1 M BaOH solution at 40m of 0.15m HCI solution is
Kepler's second law (law of areas) of planetary motion leads to law of conservation of
- If $\int e^{2x}f' \left(x\right)dx =g \left(x\right)$, then $ \int\left(e^{2x}f\left(x\right) + e^{2x} f' \left(x\right)\right)dx =$
View More Questions