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07 Percent composition Lab 2

Last updated over 4 years ago
29 questions
Watch this video for bunsen burner basic operation
Look at the data table below and copy into your notebook so that you can record the data as you go along.
Now fill in the data table with the corresponding values and perform necessary calculations.
1

Test tube and CuSO4

1

Empty test tube

1

Mass of Hydrate

1

Test tube and anhydrous salt

1

Empty test tube mass

1

Mass of anhydrous salt

1

Mass of water lost

1

Percent water

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Remember to compare the ratio of moles, you calculate the moles of each substance to be compared. Then you divide by the smaller amount of moles. So determine the moles of the anhydrous salt and the moles of water contained in the sample. Divide by the smaller mole amount. The salt should be the smaller one. If not, there was an error in the procedure.
4

Determine the ratio of moles of water to moles of salt. (find moles of each, divide both by the smallest number of moles) What number should be in front of the water in the formula CuSO4• ? H2O?

4

Determine the ratio of moles of water to moles of salt. What number should be in front of the water in the formula MgSO4 • ? H2O

4

Determine the ratio of moles of water to moles of salt. What number should be in front of the water in the formula CoCl2 • ? H2O?

2

Which compound lost the greatest percent of mass of water?

2

Did this match what your formulas indicated?