General Chemistry 1311 TAMUK Chemistry Depart Total: 100 2015 Fall Exam s (Chl2

Question

General Chemistry 1311 TAMUK Chemistry Depart Total: 100 2015 Fall Exam s (Chl2 & Chl) phases. Identify the significance of the three phase diagram for water and two important points lines and two Three phase lines: Your answers Two important points: What is your explanation for solid-liquid phase line for HO has a negative slope 7. Draw phase diagram for carbon dioside (Coa) and identify three phases. Identify the significance of the three lines and two important points Your answers: Three phase lines: Two important points:

Explanation / Answer

8)molar mass of KF=58 g/mol
moles of KF=78.656/58
=1.356
mass of H2O=1.033*225
=232.425 g
moles of H2O=232.425/18
=12.9125
mole fraction of KF=1.356/(12.9125+1.356)
=0.095
kg of H2O=0.232425 kg
molality = 1.356/0.232425
=5.834
liter of the solution = 0.225 L
molarity = 1.356/0.225
=6.02667

9)molar mass = 164 g/mol
moles of Ca(NO3)2=18.536/164
=0.11302
kg of H2O=0.183544 kg
molality of the solution = 0.11302/0.183544
=0.6157
vant hoff factor = 3
elecvation in boiling point = 3*0.512*0.6157
=0.9457
boiling point of the solution = 100.9457
FREEZING POINT DEPRESSION = 3*1.86*0.6157
=3.4356
freezing point of the solution = -3.4356

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