3.0 molal NaOH solution has a density of 1.11 | vedclass

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

Question

(D) Given,density of the solution is $1.110 \, g \, mL^{-1}$.The concentration of the $NaOH$ solution is $3.0$ molal,which means $3$ moles of $NaOH$ a

Vedclass · Accepted Answer

$2.97$

Vedclass · Answer

(D) Given,density of the solution is $1.110 \, g \, mL^{-1}$.The concentration of the $NaOH$ solution is $3.0$ molal,which means $3$ moles of $NaOH$ are present in $1000 \, g$ of solvent (water).Mass of $NaOH = 3 \, 	ext{mol} 	imes 40 \, g \, 	ext{mol}^{-1} = 120 \, g$.Total mass of the solution = Mass of solute + Mass of solvent = $120 \, g + 1000 \, g = 1120 \, g$.Volume of the solution = $\frac{	ext{Mass}}{	ext{Density}} = \frac{1120 \, g}{1.110 \, g \, mL^{-1}} \approx 1009.01 \, mL = 1.00901 \, L$.Molarity $(M)$ = $\frac{	ext{Number of moles of solute}}{	ext{Volume of solution in } L} = \frac{3 \, 	ext{mol}}{1.00901 \, L} \approx 2.97 \, M$.Therefore,the molarity of the solution is $2.97 \, M$.

Column-$I$	Column-$II$
$A$. $5.6 \ L$ of $SO_{2(g)}$ at $STP$	$I$. $32 \ g$
$B$. $1.2 \times 10^{24}$ atoms of oxygen	$II$. $66 \ g$
$C$. $33.6 \ L$ of $CO_{2(g)}$ at $STP$	$III$. $42 \ g$
$D$. $1.5 \ g$-molecule of $N_2$	$IV$. $16 \ g$

$3.0$ molal $NaOH$ solution has a density of $1.110 \, g/mL$. The molarity of the solution is

Similar Questions

Which of the following species has the highest mass?

Ferric alum has the composition $(NH_4)_2SO_4 \cdot Fe_2(SO_4)_3 \cdot xH_2O$,where $x$ is..........

The ratio of the number of water molecules in Mohr's salt and potash alum is $.... \times 10^{-1}$.

Which of the following is the heaviest?

Match the following:

Column-$I$ Column-$II$

$A$. $5.6 \ L$ of $SO_{2(g)}$ at $STP$ $I$. $32 \ g$

$B$. $1.2 \times 10^{24}$ atoms of oxygen $II$. $66 \ g$

$C$. $33.6 \ L$ of $CO_{2(g)}$ at $STP$ $III$. $42 \ g$

$D$. $1.5 \ g$-molecule of $N_2$ $IV$. $16 \ g$

The correct match is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module