Mixtures and Solutions

Which answer best describes a solid dissolved in a liquid?

• air

• soda

• saltwater

• water

Which answer best describes the easiest way to separate a mixture of iron filings and dirt?

• Pick the iron filings out by hand

• Put the mixture in water

• Use a magnet

• Boil the mixture

Which answer best shows a mixture that is not a solution?

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Which answer best defines a mixture?

• a substance into which another substance dissolves

• the ability of a substance to dissolve in another substance

• a combination of two or more substances that do not join together to form a new substance

• to form a solution with another substance

Which answer best defines a solution?

• a substance into which another substance dissolves

• the ability of a substance to dissolve in another substance

• a combination of two or more substances that do not join together to form a new substance

• a mixture in which the substances are spread out evenly between one another and cannot be told apart

Which answer best defines a solubility?

• the ability of a substance to dissolve in another substance

• a mixture of metals

• a substance that dissolves in another substance

• a mixture in which the substances are spread out evenly between one another and cannot be told apart

A student makes a drink stirring lemon juice and sugar into a glass of water. Why is this drink considered a solution?

• The lemon juice and sugar change the taste of the water.

• The water changes color.

• The lemon juice and sugar dissolve in the water.

• The student stirs the mixture.

Darika dissolves 20 grams of salt in a pan of 200 milliliters of water. The student places the pan on a hot stove. How much salt is left after all the water evaporates?

• There is no salt left because it evaporates with the water.

• Twenty grams of salt are left after all the water evaporates.

• Ten grams of salt evaporate, leaving ten grams in the pan.

• None of the above

Which statement about solutions is true?

• All solutions contain more than two substances.

• A solution can only be created from liquids.

• All mixtures are solutions.

• All solutions are mixtures.

Which is the appropriate tool to use when recording the steps in separating a mixture?

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