CLS8 Unit 2 Review (Cambridge)

Solute

• a liquid that other substances will dissolve in

• a substance that is dissolved

• a substance that will not dissolve

• a mixture in which particles of a substance are mixed with particles of a liquid so that the substance can no longer be seen.

Solvent

• a liquid that other substances will dissolve in

• a substance that is dissolved

• a substance that will not dissolve

• a mixture in which particles of a substance are mixed with particles of a liquid so that the substance can no longer be seen.

insoluble

• a liquid that other substances will dissolve in

• a substance that is dissolved

• a substance that will not dissolve

• a mixture in which particles of a substance are mixed with particles of a liquid so that the substance can no longer be seen.

transparent

• a liquid that other substances will dissolve in

• describes a material through which light can pass

• a substance that will not dissolve

• a mixture in which particles of a substance are mixed with particles of a liquid so that the substance can no longer be seen.

solution

• a liquid that other substances will dissolve in

• describes a material through which light can pass

• a substance that will not dissolve

• a mixture in which particles of a substance are mixed with particles of a liquid so that the substance can no longer be seen.

Dan adds 30g sodium chloride to 150g of water in a beaker. What will be the mass of the solution of sodium chloride that is formed?

• 120g

• 180g

• 30g

• 150g

If we want to have accurate results when measuring the solubility of different substances, we want to use ​ (a)   mass of water for each substance because ​ (b)   will dissolve in it and they need to compare the two substances.

• the same
• the more water there is, the more of the substance
• a different
• the more water there is, the less substance

If we want to have accurate results when measuring the solubility of different substances, we want to use ​ (a)   temperature of water for each substance because ​ ​ (b)   , the more of the substance will dissolve and they need to compare the two substances.

• the same
• the more water there is, the more of the substance
• a different
• the lower the temperature
• the higher the temperature

When measuring the amount of solute that can be dissolved in a solution, it is better to measure the mass of the solute instead of counting how many spatulas because

• measurement of mass is more accurate. Spatulas can have slight errors in the amount of solute per spatula.

• spatulas are more accurate so we can count them.

​ (a)   can be used to separate colors found in dyes or ink because the colors will separate. They separate because different dyes that make up the ​ (b)   have different ​ (c)   . The more ​ (d)   the dye, the ​ (e)   it will be carried up the paper.

• Chromatography
• different
• solution
• solubilities
• soluble
• further