AP EAMCET · Chemistry · Solutions
The experimentally determined molar mass of a non-volatile solute, \(\mathrm{BaCl}_2\) in water by Cottrell's method, is
- A equal to the calculated molar mass
- B more than the calculated molar mass
- C less than the calculated molar mass
- D double of the calculated molar mass
Answer & Solution
Correct Answer
(C) less than the calculated molar mass
Step-by-step Solution
Detailed explanation
\(\mathrm{BaCl}_2\) being ionic in nature, ionises completely to give \(\mathrm{Ba}^{2+}\) and \(2 \mathrm{Cl}^{-}(1+2=3)\) ions, i.e., number of particles increases in the solution. \(\therefore \quad i=\frac{3}{1}=3=\frac{M_c}{M_o}\) (where, \(M_c=\) calculated molar mass and…
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