36.5 % HCl has density equal to 1.20 g mL -1. The molarity ( M ) and molality (m), respectively, are

Question

36.5 % HCl has density equal to 1.20 g mL -1. The molarity ( M ) and molality (m), respectively, are (A) 15.7,15.7 (B) 12,12 (C) 15.7,12 (D) 12,15.7

Tardigrade Admin · Accepted Answer

M=( % text by weight × 10 × d /M w2)=(36.5 × 10 × 1.2/36.5) =12 M m=(36.5 × 1000/36.5 ×(100-36.5))=(1000/63.5)=15.7 m

Q. $36.5% H Cl$ has density equal to $1.20 g m L^{- 1}$ . The molarity $(M)$ and molality (m), respectively, are