condensed on the Inside tuni mokecular wognich 4. If liquid droplets were left c

Question

condensed on the Inside tuni mokecular wognich 4. If liquid droplets were left condensed on the inside flask walis, ww the ex molecular weight be higher, lower, or no different than the actual molecular wsight 5. If the flask is not dried prior to measuring the mass of the flask after it has been removed from the hot water bath, will the experimental molecular weight be higher, lower,or no different than the actual molecular weight? 6. If the no-hole rubber stopper is not placed firmly in the flask when the one-hole nuta stopper is replaced by the no-hole rubber stopper (so that air enters the flask), wil the xperimental molecular weight be higher, lower, or no different than the true molecular w ww the 7. If the mass of the gas is found by subtracting the mass of the flask plus stopp st air from the mass of the flask plus stopper and unknown gas, will the experimenta cular weight be higher, lower, or no different than the true molecular weight?

Explanation / Answer

Alright so, we have to remember, with other variable as constant,

g/molecular weight x kg of solvent = molality

So, with respect to this relation,

4. If liquid droplets were left condesned inside the flask, the final weight would be higher, the difference of final to intial will be lowere and hence the moecular weight would be lower then actual.

5. If flask is not dried, the initial mass would be higher then actual, so mass difference of final to intial would be lower then actual mass and thus, molecular weight calculated would be lower then actual value.

6. If the no-hole rubber stopper is not placed tightly over the flask, some air enters the flask, increasing the final weight thus, mas balance of final to intial would be higher then actual. So the molecualr weight calculated would be higher then actual value.

7. If mass of gas is found as difference of flask+stopper with moist air from mass of flask+stopper+unknown gas, the weight would be lower and thus moelcular weight also be lower then actual value.

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