Ethylene glycol is used as an anti-freezing a | vedclass

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

Question

(B) The depression in freezing point is given by the formula: $\Delta T_f = K_f 	imes m$Where $m$ is the molality of the solution.Given: $\Delta T_f

Vedclass · Accepted Answer

$804.3$

Vedclass · Answer

(B) The depression in freezing point is given by the formula: $\Delta T_f = K_f 	imes m$Where $m$ is the molality of the solution.Given: $\Delta T_f = 6 \ K$,$K_f = 1.85 \ K \ kg \ mol^{-1}$,$W_A = 4 \ kg$,$M_B = 62 \ g \ mol^{-1}$.Substituting the values in the formula: $\Delta T_f = K_f 	imes \frac{w_B}{M_B 	imes W_A}$$6 = \frac{1.85 	imes w_B}{62 	imes 4}$$w_B = \frac{6 	imes 62 	imes 4}{1.85}$$w_B = \frac{1488}{1.85} \approx 804.32 \ g$Thus,the amount of ethylene glycol required is approximately $804.3 \ g$.

Ethylene glycol is used as an anti-freezing agent. Calculate the amount of ethylene glycol to be added to $4 \ kg$ of water to prevent it from freezing at $-6 \ ^{\circ}C$. ($K_f$ for water $= 1.85 \ K \ kg \ mol^{-1}$) (molar mass of $(CH_2OH)_2 = 62 \ g \ mol^{-1}$) .......... $g$.

Similar Questions

Given that $\Delta T_f$ is the depression in freezing point of the solvent in a solution of a non-volatile solute of molality $m$,the quantity $\lim_{m \to 0} \left( \frac{\Delta T_f}{m} \right)$ is equal to:

Which of the following aqueous solutions has the highest freezing point?

If the freezing point of a $5\%$ (by mass) aqueous solution of cane sugar is $271 \ K$ and the freezing point of pure water is $273.15 \ K$,then the freezing point of a $5\%$ (by mass) aqueous solution of glucose will be .......... $K$.

$CaCl_2$ is preferred over $NaCl$ for clearing ice on roads,particularly in very cold countries. This is because:

$6 \ g$ of a non-volatile,non-electrolyte $X$ dissolved in $100 \ g$ of water freezes at $-0.93^{\circ} C$. The molar mass of $X$ in $g \ mol^{-1}$ is ($K_f$ of $H_2O = 1.86 \ K \ kg \ mol^{-1}$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module