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Chapter 1: Problem 30

Give four examples illustrating each of the following terms. a. homogeneous mixture b. heterogeneous mixture c. compound d. element e. physical change f. chemical change

Short Answer

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Examples: a. Homogeneous Mixture: Saltwater, Air, Black Coffee, Brass b. Heterogeneous Mixture: Oil and water, Salad, Sand and water, Chocolate chip cookie c. Compound: Water (H2O), Carbon dioxide (CO2), Sodium chloride (NaCl), Sucrose (C12H22O11) d. Element: Gold (Au), Oxygen (O), Hydrogen (H), Carbon (C) e. Physical Change: Melting of ice, Boiling of water, Crushing a can, Breaking glass f. Chemical Change: Rusting of iron, Burning of wood, Digesting food, Mixing baking soda and vinegar

Step by step solution

01

1. Homogeneous Mixture

Homogeneous mixtures are mixtures that have a uniform composition throughout. The components cannot be visibly distinguished from one another. Example 1: Saltwater Example 2: Air Example 3: Black Coffee Example 4: Brass (alloy of copper and zinc)
02

2. Heterogeneous Mixture

Heterogeneous mixtures have a non-uniform composition, and the components can be visibly separated. Example 1: Oil and water Example 2: Salad Example 3: Sand and water mixture Example 4: Chocolate chip cookie
03

3. Compound

A compound is a substance composed of two or more elements that are chemically bonded together. Example 1: Water (H2O) Example 2: Carbon dioxide (CO2) Example 3: Sodium chloride (NaCl, table salt) Example 4: Sucrose (C12H22O11, common sugar)
04

4. Element

Elements are pure chemical substances that cannot be broken down into simpler substances through ordinary chemical reactions. Elements consist of a single type of atom. Example 1: Gold (Au) Example 2: Oxygen (O) Example 3: Hydrogen (H) Example 4: Carbon (C)
05

5. Physical Change

A physical change is a change in a substance's form (state, shape, or size) without changing its chemical composition. Example 1: Melting of ice Example 2: Boiling of water Example 3: Crushing a can Example 4: Breaking glass
06

6. Chemical Change

A chemical change involves a change in a substance's chemical composition, resulting in the formation of new products. Example 1: Rusting of iron Example 2: Burning of wood Example 3: Digesting food Example 4: Mixing baking soda and vinegar

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Most popular questions from this chapter

You have two beakers, one filled to the 100-mL mark with sugar (the sugar has a mass of 180.0 g) and the other filled to the 100-mL mark with water (the water has a mass of 100.0 g). You pour all the sugar and all the water together in a bigger beaker and stir until the sugar is completely dissolved. a. Which of the following is true about the mass of the solution? Explain. i. It is much greater than 280.0 g. ii. It is somewhat greater than 280.0 g. iii. It is exactly 280.0 g. iv. It is somewhat less than 280.0 g. v. It is much less than 280.0 g. b. Which of the following is true about the volume of the solution? Explain. i. It is much greater than 200.0 mL. ii. It is somewhat greater than 200.0 mL. iii. It is exactly 200.0 mL. iv. It is somewhat less than 200.0 mL. v. It is much less than 200.0 mL.

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