Question

A hydrate of potassium carbonate has the formula K2CO3•x H20, where x represents the

number of water molecules in the formula A 10.00 g sample of the hydrate is heated, and after
the water evaporates, the anhydrous salt (salt without water) has a mass of 7.93 g.
a Calculate the mass of water in the hydrate
b. Calculate the percent of water in this hydrate?
c. Determine the formula of the hydrate SHOW YOUR WORK PLEASE

Answer 1

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Step-by-step explanation:

10 - 7.93 = 2.07 g of H2O

2.07 g / 18.015 g/mol = 0.1149 mol of H2O

7.93 g / 138.204 g/mol = 0.057379 mol of K2CO3

0.1149 mol / 0.057379 mol = 2