Empirical Formula of a Hydrate Lab

How many grams of mass were lost during the heating process? Choose the closest answer

1.804g

How many grams of anhydrous magnesium chloride were in the crucible after heating? Choose the closest answer.

2.342g

How many grams of water were lost during the heating process? Choose the closest answer.

2.658g

How many grams of anhydrous copper (II) sulfate were in the crucible after heating? Choose the closest answer.

3.196 g

How many grams of copper sulfate hydrate were added to the crucible before heating?

5.000 g

How many grams of magnesium chloride hydrate were added to the crucible before heating?

5.000 g

How many moles of anhydrous copper (II) sulfate remained in the crucible after heating? The molar mass of anhydrous copper (II) sulfate is 159.609 g/mol. Choose the closest answer.

0.02002 moles

How many moles of anhydrous magnesium chloride remained in the crucible after heating? The molar mass of anhydrous magnesium chloride is 95.211 g/mol. Choose the closest answer.

0.02460 moles

How many moles of water were lost during the heating? The molar mass of water is 18.015 g/mol. Choose the closest answer.

0.1001 moles

How many moles of water were lost during the heating? The molar mass of water is 18.015 g/mol. Choose the closest answer.

0.1475 moles

What was the color of the copper sulfate compound before heating?

Blue

Calcium sulfate is a white solid found as two hydrates, a hemihydrate known as plaster of Paris and a dehydrate known as gypsum. The hemihydrate is a white solid as shown in the figure below. Given that the molar mass of the anhydrous calcium sulfate is 136.14 g/mol, the molar mass of the hemihydrate is 145.15 g/mol, and the molar mass of water is 18.015 g/mol, what is the empirical formula of the hemihydrate?

CaSO4 x0.5H2O

Which of the following represents the balanced chemical equation for this reaction?

CuSO4 x 5H2O(s) -> CuSO4(s) + 5H2O(g)

In Experiment 2, which of the following represents the balanced chemical equation for this reaction?

MgCl2 x 6H2O(s) -> MgCl2(s) + 6H2O(g)

Why was mass lost from the crucible during the reaction?

The water of hydration was released as water vapor

What was the color of the copper sulfate after heating?

White

What was the color of the magnesium chloride after heating?

White

What was the color of the magnesium chloride hydrate compound before heating?

White