Calculate the amount of benzoic acid $(C_{6}H_{5}COOH)$ required for preparing $250 \ mL$ of $0.15 \ M$ solution in methanol.
(N/A) $0.15 \ M$ solution of benzoic acid in methanol means that $1000 \ mL$ of solution contains $0.15 \ mol$ of benzoic acid.
Therefore,$250 \ mL$ of solution contains $= \frac{0.15 \times 250}{1000} \ mol = 0.0375 \ mol$ of benzoic acid.
Molar mass of benzoic acid $(C_{6}H_{5}COOH) = (7 \times 12) + (6 \times 1) + (2 \times 16) = 122 \ g \ mol^{-1}$.
Hence,the required mass of benzoic acid $= 0.0375 \ mol \times 122 \ g \ mol^{-1} = 4.575 \ g$.
Therefore,$250 \ mL$ of solution contains $= \frac{0.15 \times 250}{1000} \ mol = 0.0375 \ mol$ of benzoic acid.
Molar mass of benzoic acid $(C_{6}H_{5}COOH) = (7 \times 12) + (6 \times 1) + (2 \times 16) = 122 \ g \ mol^{-1}$.
Hence,the required mass of benzoic acid $= 0.0375 \ mol \times 122 \ g \ mol^{-1} = 4.575 \ g$.
Explore More
Similar Questions
The molar concentration of chloride ions in the resulting solution of $300 \ mL$ of $3.0 \ M$ $NaCl$ and $200 \ mL$ of $4.0 \ M$ $BaCl_{2}$ will be (in $M$)
The molarity of a solution obtained by mixing $750 \, mL$ of $0.5 \, M \, HCl$ with $250 \, mL$ of $2 \, M \, HCl$ will be $......... \, M$.
$A$ solution of $H_2O_2$ used for hair bleaching contains approximately $5.0 \ g$ of $H_2O_2$ per $100 \ mL$ of solution. If the molar mass of $H_2O_2$ is $34 \ g/mol$,what is the molarity of this solution?
Medium
View SolutionWhich of the following modes of expressing concentration is independent of temperature?
$200 \, mL$ of $0.6 \, N$ $H_2SO_4$ and $100 \, mL$ of $0.3 \, N$ $HCl$ are mixed together. The acidic normality of the resultant solution is $........ N$.
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo