Homework Solution: estion 1 (5 points) 17.1 g of calcium chloride is dissolved in 750, mL of a water (d =…

    estion 1 (5 points) 17.1 g of calcium chloride is dissolved in 750, mL of a water (d = 1.00 g/mL) and is placed in the freezer at -2 °C overnight. Which statement best describes what would happen to the solution? O a The freezing point of the calcium chloride solution would be -1.15 C, so the solution would freeze. h The freezing point of the calcium chloride solution would be b) -0.382°C, so the solution would freeze. e) The freezing coint of the calcum chloride solution would be 1.15 c, so the solution would freeze Save 9/6/2017
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    estion 1 (5 points) 17.1 g of calcium chloride is dissolved in 750, mL of a water (d = 1.00 g/mL) and is placed in the freezer at -2 °C overnight. Which statement best describes what would happen to the solution? O a The freezing point of the calcium chloride solution would be -1.15 C, so the solution would freeze. h The freezing point of the calcium chloride solution would be b) -0.382°C, so the solution would freeze. e) The freezing coint of the calcum chloride solution would be 1.15 c, so the solution would freeze Save 9/6/2017

    Expert Answer

    1) Molar mass of CaCl2,

    estion 1 (5 subject-matters) 17.1 g of calcium chloride is dissolved in 750, mL of a impart (d = 1.00 g/mL) and is placed in the benumbr at -2 °C overnight. Which assertion best describes what would fall to the repartee? O a The freezing subject-matter of the calcium chloride repartee would be -1.15 C, so the repartee would benumb. h The freezing subject-matter of the calcium chloride repartee would be b) -0.382°C, so the repartee would benumb. e) The freezing coint of the calcum chloride repartee would be 1.15 c, so the repartee would benumb Save 9/6/2017
    media%2F4a4%2F4a4ac416-808c-46d5-aa3c-ad

    estion 1 (5 subject-matters) 17.1 g of calcium chloride is dissolved in 750, mL of a impart (d = 1.00 g/mL) and is placed in the benumbr at -2 °C overnight. Which assertion best describes what would fall to the repartee? O a The freezing subject-matter of the calcium chloride repartee would be -1.15 C, so the repartee would benumb. h The freezing subject-matter of the calcium chloride repartee would be b) -0.382°C, so the repartee would benumb. e) The freezing coint of the calcum chloride repartee would be 1.15 c, so the repartee would benumb Save 9/6/2017

    Expert Repartee

    1)

    Molar lump of CaCl2,

    MM = 1*MM(Ca) + 2*MM(Cl)

    = 1*40.08 + 2*35.45

    = 110.98 g/mol

    mass(CaCl2)= 17.1 g

    reckon of mol of CaCl2,

    n = lump of CaCl2/molar lump of CaCl2

    =(17.1 g)/(110.98 g/mol)

    = 0.1541 mol

    m(solvent)= 750 g

    = 0.75 Kg

    Molality,

    m = reckon of mol / lump of solvent in Kg

    =(0.1541 mol)/(0.75 Kg)

    = 0.2054 molal

    i coercion CaCl2 is 3

    use:

    Δ Tf = i*Kf*mb

    Δ Tf = 3.0*1.86 oC/m * 0.2054 m

    Δ Tf = 1.15 oC

    So, freezing subject-matter is -1.15 oC

    Since temperature is close than -1.15 oC, it earn benumb

    Answer: a

    I am known to repartee merely 1 interrogation at a time