Lab Questions Suppose water vapor condensed on the crucible after it was fired,

Question

Lab Questions Suppose water vapor condensed on the crucible after it was fired, but before it was initially weighed. The condensation caused the mass measurements of both the empty crucible, and the crucible with the hydrated salt, to be higher than actual. What happens when the hydrate mass is calculated by taking the difference between the measurements? 1. The condensed water (on the crucible in question 1) evaporates when the hydrate is heated in the crucible. Providing that the condensation does not recur on cooling, what now happens to the calculations for the lost water mass and the water percentage? 2.

Explanation / Answer

Part 1- since the measurement got erroneously increased by the same amount ( the amount of condensed water vapor), the hydrated mass calculated by taking the difference between the measurements would be accurate.

Part 2- Calculated lost water mass and water percentage would be little higher than the actual value of water content of hydrated salt.

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