Density of 1 M solution of C6H12O6 is 118 g/cm3. If Kf (H2O) is 1.86 K m-1, the solution freezes at

Question

Density of 1 M solution of C6H12O6 is 118 g/cm3. If Kf (H2O) is 1.86 K m-1, the solution freezes at (A) -1.58°C (B) -1.86°C (C) -3.16°C (D) -3.58°C

Tardigrade Admin · Accepted Answer

A 1 M solution means 1 mol of C6H12O6 (molar mass = 180 g mol-1) of solute in 1000 cm3 of solution. Mass of solution = 1000 × 1.18 = 1180 g Mass of water = 1180 - 180 = 1000 g ∴ 1 M C6 H12 O6 solution = 1 m Δ Tf = Kf m Tf = (0 - 1.86)° C = - 1.86 ° C

Q. Density of 1 M solution of $C_{6} H_{12} O_{6}$ is 118 $g / c m^{3}$ . If $K_{f} (H_{2} O)$ is $1.86 K m^{- 1}$ , the solution freezes at

-1.58 $^{\circ}$ C

-1.86 $^{\circ}$ C

-3.16 $^{\circ}$ C

-3.58 $^{\circ}$ C

Q. Density of 1 M solution of C6​H12​O6​ is 118 g/cm3. If Kf​(H2​O) is 1.86Km−1, the solution freezes at

-1.58∘C

-1.86∘C

-3.16∘C

-3.58∘C

A 1 M solution means 1 mol of C6​H12​O6​ (molar mass = 180 g mol−1) of solute in 1000 cm3 of solution. Mass of solution = 1000 × 1.18 = 1180 g Mass of water = 1180 - 180 = 1000 g ∴ 1 M C6​H12​O6​ solution = 1 m ΔTf​=Kf​m Tf​=(0−1.86)∘C=−1.86∘C

Q. Density of 1 M solution of $C_{6} H_{12} O_{6}$ is 118 $g / c m^{3}$ . If $K_{f} (H_{2} O)$ is $1.86 K m^{- 1}$ , the solution freezes at

-1.58 $^{\circ}$ C

-1.86 $^{\circ}$ C

-3.16 $^{\circ}$ C

-3.58 $^{\circ}$ C