WorksheetsHydrates
Total questions: 25
Worksheet time: 25mins
A 4.4 gram sample of a hydrate was heated until the water of hydration was driven off. The anhydrous compound remaining had a mass of 3.3 grams. What is the percentage by mass of water in the hydrate?
75%
33%
67%
25%
Calculate the percent by mass of water in the hydrate MgSO4 ⋅ 7H2O. Be sure to round all masses from the Periodic Table to the nearest tenth and round the percent water to the correct number of significant figures. Include the correct unit with your numerical answer.
(a)
Calculate the percent by mass of water in the hydrate Na2CO3 ⋅ 10H2O. Be sure to round all masses from the Periodic Table to the nearest tenth and round the percent water to the correct number of significant figures. Include the correct unit with your numerical answer.
(a)
Calculate the percent by mass of water in the hydrate FeCl3 ⋅ 6H2O. Be sure to round all masses from the Periodic Table to the nearest tenth and round the percent water to the correct number of significant figures. Include the correct unit with your numerical answer.
(a)
What is the correct name for the compound, CaSO4•2H2O?
carbon sulfate dihydrate
calcium sulfur oxide dihydrate
calcium sulfide dihydrate
calcium sulfate dihydrate
calcium sulfite dihydrate
A 15.67 g sample of a hydrate of magnesium carbonate was heated to drive off the water. The mass was reduced to 7.58 g. What is the formula of the hydrate?
MgCO3 · 5H2O
MgCO3 · 4H2O
MgCO3 · 6H2O
MgCO3 · H2O
What is the chemical formula for iron(III) chloride hexahydrate?
FeCl3·6H2O
FeCl3·3H2O
Fe2Cl6·6H2O
Fe3Cl6·H12O3
It is the simplest carbohydrates or the simplest sugars.
saccharides
monosaccharides
disaccharides
polysaccharides
Carbohydrates are sometimes called _____________.
saccharide
monosaccharide
disaccharide
polysaccharide
The word carbohydrate comes from the French term hydrate de carbone which means ______________.
hydrates of sugar
hydrates of milk
hydrates
hydrates of carbon
A hydrate of magnesium chloride is present and the following data is collected:
mass of crucible = 22.05 grams
mass of crucible + hydrate = 25.95 grams
mass of crucible and contents after heating = 23.19 grams
What is the percentage of water in this hydrate?
(a)
A 10 gram sample of a hydrate was heated until all the water was removed. The mass of the anhydrous compound was found to be 6 grams. What is the percentage by mass of water in the hydrate?
40%
60%
50%
30%
Calculate the percent by mass of water in the hydrate CuSO4·5H2O. Use the atomic masses: Cu = 63.5, S = 32.1, O = 16.0, H = 1.0.
36.1%
45.2%
51.1%
56.4%
What is the correct name for the compound, Na2CO3·10H2O?
sodium carbonate decahydrate
sodium carbonate dihydrate
sodium bicarbonate decahydrate
sodium bicarbonate dihydrate
A hydrate of barium chloride is heated and the following data is collected: mass of crucible = 20.00 grams, mass of crucible + hydrate = 25.00 grams, mass of crucible and contents after heating = 22.00 grams. What is the percentage of water in this hydrate?
60%
40%
20%
50%
What is the chemical formula for cobalt(II) chloride hexahydrate?
CoCl2·6H2O
CoCl3·6H2O
Co2Cl3·6H2O
CoCl2·3H2O
A 12.5 gram sample of a hydrate of calcium sulfate was heated to drive off the water. The mass was reduced to 10.0 grams. What is the formula of the hydrate?
CaSO4·2H2O
CaSO4·H2O
CaSO4·3H2O
CaSO4·4H2O
Calculate the percent by mass of water in the hydrate FeSO4·7H2O. Use the atomic masses: Fe = 55.8, S = 32.1, O = 16.0, H = 1.0.
45.3%
55.9%
62.9%
48.8%
What is the correct name for the compound, MgSO4·7H2O?
magnesium sulfate heptahydrate
magnesium sulfate hexahydrate
magnesium sulfide heptahydrate
magnesium sulfide hexahydrate
A hydrate of sodium sulfate is present and the following data is collected: mass of crucible = 18.00 grams, mass of crucible + hydrate = 23.00 grams, mass of crucible and contents after heating = 20.00 grams. What is the percentage of water in this hydrate?
60%
40%
20%
50%
What is the chemical formula for nickel(II) sulfate hexahydrate?
NiSO4·6H2O
NiSO4·7H2O
Ni2SO4·6H2O
NiSO3·6H2O
A 20 gram sample of a hydrate of copper(II) sulfate was heated to drive off the water. The mass was reduced to 12.8 grams. What is the formula of the hydrate?
CuSO4·5H2O
CuSO4·3H2O
CuSO4·2H2O
CuSO4·H2O
Calculate the percent by mass of water in the hydrate Ba(OH)2·8H2O. Use the atomic masses: Ba = 137.3, O = 16.0, H = 1.0.
53.3%
45.1%
60.8%
48.2%
What is the correct name for the compound, AlCl3·6H2O?
aluminum chloride hexahydrate
aluminum chloride dihydrate
aluminum chloride trihydrate
aluminum chloride pentahydrate
A hydrate of zinc sulfate is heated and the following data is collected: mass of crucible = 19.00 grams, mass of crucible + hydrate = 24.00 grams, mass of crucible and contents after heating = 21.00 grams. What is the percentage of water in this hydrate?
60%
40%
20%
50%
