4. Suppose in Part C that a student ignores the direction in Step 9 to measure t

Question

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. Explain your answer:

Explanation / Answer

Solution:

The mistake will influence the boiling point

Reason: Since the water has been escaped from the solvent (which was a solvent), the molality = number of moles of solute/volume of solvent (in L)

Now the molality of the substance will increase, the increase in molality will change the value of dT, which will increase the variation in temperature

Hence temperature observed will be higher than the actual temperature

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