The molarity of the solution prepared by diss | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) $1$. Calculate the molar mass of oxalic acid dihydrate $(H_{2}C_{2}O_{4} \cdot 2H_{2}O)$:$M_w = (2 	imes 1.0) + (2 	imes 12.0) + (4 	imes 16.0)

Vedclass · Accepted Answer

$20$

Vedclass · Answer

(D) $1$. Calculate the molar mass of oxalic acid dihydrate $(H_{2}C_{2}O_{4} \cdot 2H_{2}O)$:$M_w = (2 	imes 1.0) + (2 	imes 12.0) + (4 	imes 16.0) + 2 	imes (2 	imes 1.0 + 16.0) = 2 + 24 + 64 + 36 = 126 \ g \ mol^{-1}$.$2$. Calculate the number of moles of oxalic acid:$n = \frac{	ext{mass}}{M_w} = \frac{6.3 \ g}{126 \ g \ mol^{-1}} = 0.05 \ mol$.$3$. Calculate the molarity $(M)$ of the solution:$M = \frac{n}{V(L)} = \frac{0.05 \ mol}{0.250 \ L} = 0.2 \ mol \ L^{-1}$.$4$. Express the molarity in the form $x 	imes 10^{-2}$:$0.2 = 20 	imes 10^{-2}$.Therefore,the value of $x$ is $20$.

The molarity of the solution prepared by dissolving $6.3 \ g$ of oxalic acid $(H_{2}C_{2}O_{4} \cdot 2H_{2}O)$ in $250 \ mL$ of water in $mol \ L^{-1}$ is $x \times 10^{-2}$. The value of $x$ is ..... . (Nearest integer)
[Atomic mass : $H: 1.0, C: 12.0, O: 16.0]$

Similar Questions

Calculate the mass percentage of aspirin $(C_{9}H_{8}O_{4})$ in acetonitrile $(CH_{3}CN)$ when $6.5 \ g$ of $C_{9}H_{8}O_{4}$ is dissolved in $450 \ g$ of $CH_{3}CN$.

What would be the molality of $20\%$ (mass/mass) aqueous solution of $KI$? (Molar mass of $KI = 166 \, g \, mol^{-1}$)

What is the approximate normality of a $10\% (W/V)$ $H_2SO_4$ solution?

$A$ sample of drinking water was found to be severely contaminated with chloroform,$CHCl_{3}$,supposed to be carcinogenic in nature. The level of contamination was $15 \ ppm$ (by mass).
$(i)$ Express this in percent by mass.
$(ii)$ Determine the molality of chloroform in the water sample.

How many moles and grams of sodium chloride are present in $200 \ cm^3$ of $0.2 \ M \ NaCl$ solution?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

The molarity of the solution prepared by dissolving $6.3 \ g$ of oxalic acid $(H_{2}C_{2}O_{4} \cdot 2H_{2}O)$ in $250 \ mL$ of water in $mol \ L^{-1}$ is $x \times 10^{-2}$. The value of $x$ is ..... . (Nearest integer)[Atomic mass : $H: 1.0, C: 12.0, O: 16.0]$