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2. In the calculations used to obtain the Kf values tabulated in Table 10.5, one fact has not been taken into account. This will cause a significant difference between the Kf value obtained using NaCl solute and the value obtained using ethylene glycol solute. What is this fact?
a. NaCl dissociates in solution while ethylene glycol does not.
b. NaCl is solid while ethylene glycol is a liquid.
c. NaCl is less soluble in water than ethylene glycol.
d. NaCl has a higher melting point than ethylene glycol.
3. How should the Kf value obtained with NaCl as the solute and recorded in Table 10.5 be modified before it is equivalent to the value obtained using ethylene glycol solute?
a. It should be multiplied by 2.
b. It should be divided by 2.
c. No modification is needed.
4. Suppose in Part C that a student ignores the direction in Step 9 to measure the boiling point as soon as the mixture boils steadily. As a result, a significant amount of the solvent (water) boils away and is lost. How would this mistake influence the measured boiling point compared to the correct value it would have if the mistake was not made?
a. Measured value would be lower than correct value.
b. Measured value would be higher than correct value.
c. Measured value would not be different from correct value.
2. In the calculations used to obtain the Kf values tabulated in Table 10.5, one fact has not been taken into account. This will cause a significant difference between the Kf value obtained using NaCl solute and the value obtained using ethylene glycol solute. What is this fact?
a. NaCl dissociates in solution while ethylene glycol does not.
b. NaCl is solid while ethylene glycol is a liquid.
c. NaCl is less soluble in water than ethylene glycol.
d. NaCl has a higher melting point than ethylene glycol.
3. How should the Kf value obtained with NaCl as the solute and recorded in Table 10.5 be modified before it is equivalent to the value obtained using ethylene glycol solute?
a. It should be multiplied by 2.
b. It should be divided by 2.
c. No modification is needed.
4. Suppose in Part C that a student ignores the direction in Step 9 to measure the boiling point as soon as the mixture boils steadily. As a result, a significant amount of the solvent (water) boils away and is lost. How would this mistake influence the measured boiling point compared to the correct value it would have if the mistake was not made?
a. Measured value would be lower than correct value.
b. Measured value would be higher than correct value.
c. Measured value would not be different from correct value.