The option that represents correct molarity (M) and molality (m) respectively for HCl solution, if 36.5 % HCl solution has a density equal to 1.2gml- 1 is:

Question

The option that represents correct molarity (M) and molality (m) respectively for HCl solution, if 36.5 % HCl solution has a density equal to 1.2gml- 1 is: (A) 15.7,15.7 (B) 12,12 (C) 15.7,12 (D) 12, 15.7

Tardigrade Admin · Accepted Answer

The relation between Molarity (M) and % mass: The relation between molality ( m ) and operatornamemass( %): m =(( w / w %) × 100/ M 2 ×(100- w / w %)) m =(36.5 × 1000/36.5 ×(100-36.5))=(1000/63.5)=15.7 m

Q. The option that represents correct molarity (M) and molality (m) respectively for HCl solution, if $36.5%$ $H Cl$ solution has a density equal to $1.2 g m l^{- 1}$ is:

$15.7, 15.7$

$12, 12$

$15.7, 12$

$12, 15.7$

The relation between Molarity $(M)$ and $%$ mass:

The relation between molality $(m)$ and $mass (%) :$ $m = \frac{( w / w % ) \times 100}{M _{2} \times ( 100 - w / w % )} m = \frac{36.5 \times 1000}{36.5 \times ( 100 - 36.5 )} = \frac{1000}{63.5} = 15.7 m$

Q. The option that represents correct molarity (M) and molality (m) respectively for HCl solution, if 36.5% HCl solution has a density equal to 1.2gml−1 is:

15.7,15.7

12,12

15.7,12

12,15.7