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Topic 7: Solutions
1. Solution: Recalling concept facts and definitions
1. Which must be a mixture of two or more substances? 4) Solution
3) Gas
1) Solid
2) Liquid
2. All aqueous mixtures must contain 3) Oxygen 4) Sand
2) Sodium chloride
1) Water
3. A small quantity of salt is stirred into a liter of water until it dissolves. The water in the mixture is
1) The solute 2) Dispersed material 3) A precipitate 4) The solvent
4. The process of recovering a salt from a solution by evaporating the solvent is known as
1) Decomposition 2) Crystallization 3) Reduction 4) Filtration
5. In a true solution, the dissolved particles
1) Are visible to the eyes 3) Are always solids
Teacher Preview Copy
Teacher Preview Copy
4) Cannot be removed by filtration
2) Will settle out on standing
6. Aqueous solutions are best described as a
1) Homogenous compounds 3) Heterogeneous compounds
2) Homogeneous mixtures 4) Heterogeneous mixtures
7. When sample X is passed through a filter paper and a white residue, Y, remains on the paper and a
clear liquid, Z, passes through. When Z is vaporized, another white residue remains. Sample X is
best classified as 3) A heterogeneous mixture
1) An element
2) A compound 4) A homogeneous mixture
8. An aqueous solution of copper sulfate is poured into a filter paper cone. What passes through the
filter paper?
1) Only the solvent 3) Both solvent and solute
2) Only the solute 4) Neither the solvent nor solute
9. One similarity between all solutions and compounds is that both
3) Have definite ratio of composition
1) Are always heterogeneous
2) Are always homogeneous 4) Are composed of two or more substances
10. A solution 3) Can be cloudy
1) Separates on standing
2) May have color 4) Can be heterogeneous
2. Solute and solvents: Determining solutes and solvent of a solution
1. In an aqueous solution of ammonium chloride, the solute is +
+
1) NH4 only 2) Cl- only 3) NH4 and Cl- 4) H2O
2. A small of CaSO4 is dissolved in H2O to make a solution. In this solution
3) H2O is the solute
1) CaSO4 is the solute
2) CaSO4 is the solvent 4) H2O is the precipitate
3. What happens when KI(s) is dissolved in water?
1) I- ions are attracted to the oxygen atoms of water
2) K+ ions are attracted to the oxygen atoms of water
3) K+ ions are attracted to the hydrogen atoms of water
4) No attractions are involved, the crystal just falls apart
4. Which diagram best illustrates the molecule-ions attractions that occur when NaBr(s) is added to water?
1) H H 3) H H
O O O O
Na+ Br- Na+ Br-
H H H H
2) H H 4) H H
Na+ Br- Na+ Br-
O O H O O
H H
H
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 233
Topic 7: Solutions
1. Solution: Recalling concept facts and definitions
1. Which must be a mixture of two or more substances? 4) Solution
3) Gas
1) Solid
2) Liquid
2. All aqueous mixtures must contain 3) Oxygen 4) Sand
2) Sodium chloride
1) Water
3. A small quantity of salt is stirred into a liter of water until it dissolves. The water in the mixture is
1) The solute 2) Dispersed material 3) A precipitate 4) The solvent
4. The process of recovering a salt from a solution by evaporating the solvent is known as
1) Decomposition 2) Crystallization 3) Reduction 4) Filtration
5. In a true solution, the dissolved particles
1) Are visible to the eyes 3) Are always solids
Teacher Preview Copy
Teacher Preview Copy
4) Cannot be removed by filtration
2) Will settle out on standing
6. Aqueous solutions are best described as a
1) Homogenous compounds 3) Heterogeneous compounds
2) Homogeneous mixtures 4) Heterogeneous mixtures
7. When sample X is passed through a filter paper and a white residue, Y, remains on the paper and a
clear liquid, Z, passes through. When Z is vaporized, another white residue remains. Sample X is
best classified as 3) A heterogeneous mixture
1) An element
2) A compound 4) A homogeneous mixture
8. An aqueous solution of copper sulfate is poured into a filter paper cone. What passes through the
filter paper?
1) Only the solvent 3) Both solvent and solute
2) Only the solute 4) Neither the solvent nor solute
9. One similarity between all solutions and compounds is that both
3) Have definite ratio of composition
1) Are always heterogeneous
2) Are always homogeneous 4) Are composed of two or more substances
10. A solution 3) Can be cloudy
1) Separates on standing
2) May have color 4) Can be heterogeneous
2. Solute and solvents: Determining solutes and solvent of a solution
1. In an aqueous solution of ammonium chloride, the solute is +
+
1) NH4 only 2) Cl- only 3) NH4 and Cl- 4) H2O
2. A small of CaSO4 is dissolved in H2O to make a solution. In this solution
3) H2O is the solute
1) CaSO4 is the solute
2) CaSO4 is the solvent 4) H2O is the precipitate
3. What happens when KI(s) is dissolved in water?
1) I- ions are attracted to the oxygen atoms of water
2) K+ ions are attracted to the oxygen atoms of water
3) K+ ions are attracted to the hydrogen atoms of water
4) No attractions are involved, the crystal just falls apart
4. Which diagram best illustrates the molecule-ions attractions that occur when NaBr(s) is added to water?
1) H H 3) H H
O O O O
Na+ Br- Na+ Br-
H H H H
2) H H 4) H H
Na+ Br- Na+ Br-
O O H O O
H H
H
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 233
