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natulia [17]
3 years ago
14

Calculate the freezing temperature of the following solution of 0.50 M glucose (a covalent compound). Assume that the molality o

f the solution is 0.50 m. (The molar and molal concentrations of dilute aqueous solutions are often identical to two significant figures.) Enter your answer in the provided box. 0.50 m glucose (a covalent compound) °C
Chemistry
1 answer:
kirza4 [7]3 years ago
4 0

Answer:

-0.93 °C

Explanation:

Hello,

The freezing-point depression is given by:

T_f-T_f^*=-iK_{solvent}m_{solute}

Whereas T_f is the freezing temperature of the solution, T_f^* is the freezing temperature of the pure solvent (0 °C since it is water), i the Van't Hoff factor (1 since the solute is covalent), K_{f,solvent} the solvent's freezing point depression point constant (in this case 1.86 C\frac{kg}{mol}) and m_{solute} the molality of the glucose.

As long as the unknown is T_f, solving for it:

T_f=T_f^*-iK_fm\\T_f=0C-1*1.86C\frac{kg}{mol}*0.5\frac{mol}{kg}  \\T_f=-0.93C

Best regards.

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Exactly 1.0 mol N2O4 is placed in an empty 1.0-L container and is allowed to reach equilibriumdescribed by the equation N2O4(g)↔
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\text{Concentration of }N_2O_4=\frac{\text{Moles of }N_2O_4}{\text{Volume of solution}}

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