A 8.19 gram sample of bacl2 2h2o was heated until the mass no longer changed. How many grams of bacl2 remained in the crucible

Question

A 8.19 gram sample of bacl2 2h2o was heated until the mass no longer changed. How many grams of bacl2 remained in the crucible

Answer 1

Heating the compound will release the water of hydration.  The gram formula mass for the hydrate is 244.264 g/ mol.  The gram formula for barium chloride itself is 208.233 g /mol.

The amount of dried barium chloride after heating is as follows:

8.19 g (208.233/244.264) = 6.98 g