29) answer : c) has lowest freezing point
delta Tf = i x Kf x m
a)
i = number of ions , for KNO3 , i = 2
Tf = - 2 x 1.86 x 0.05 = - 0.186 oC
b)
Na3PO4 , i = 4
Tf = - 4 x 1.86 x 0.02 = - 0.149 oC
c)
i = 3
Tf = - 0.418 oC
d) for pure water = 0 oC
so
CaCl2 has lowest freezing point.
29. Which has the lowest freezing point? a. 0.050 M KNO3 b. 0.020 M Na3PO4 c....
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Could you do 46 and 47 Thanks!
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