1) If the water bath only reached a temperature of 94.9C but you still used the

Question

1) If the water bath only reached a temperature of 94.9C but you still used the value of 100C in the calucation, what effect would this error have on the reported value for the molar mass of the compound? Briefly explain. (Too High, Too low, Unchanged)

2) A 250mL Erlenmeyer flask has a measured volume of 287mL. The experiment is performed with this flask but the volume of 250mL is mistakenly used in the molar mass calculation. What effect does this error have on the reported value? Briefly explain. (Too High, Too low, Unchanged)

3) When performing this experiment if you mistakenly added 6 mL of volatile liquid instead of 4 mL at the start. What effect would this have on the calculated value of the molar mass of the compound? Briefly explain. (Too High, Too low, Unchanged)

Explanation / Answer

2)

Molarity = no. of moles/Volume of solution in litres

no. of moles is directly proportional to volume

since, no. of moles = mass/molar mass

molar mass is inversely proportional to volume

Hence if instead of 250 mL, 287 mL is used, then the molar mass calculated value will be too low as compared to actual value

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