How many moles of water will be produced when 15.0 g of calcium chloride dihydrate are heated?

Question

Quizplus · Accepted Answer

First, we need to write the balanced chemical equation for the reaction:

CaCl2 · 2H2O → CaCl2 + 2H2O

This equation tells us that for every one mole of calcium chloride dihydrate, we will produce two moles of water.

The molar mass of CaCl2 · 2H2O is:

1 x 40.08 g/mol (Ca) + 2 x 35.45 g/mol (Cl) + 2 x 18.02 g/mol (H2O) = 147.02 g/mol

We can use this molar mass to convert the given mass of calcium chloride dihydrate to moles:

15.0 g / 147.02 g/mol = 0.102 moles

Finally, we can use the mole ratio from the balanced equation to determine the number of moles of water produced:

0.102 moles CaCl2 · 2H2O x (2 moles H2O / 1 mole CaCl2 · 2H2O) = 0.204 moles H2O

Therefore, the answer is C.

How Many Moles of Water Will Be Produced When 15