CHEMISTRY

Chemistry is the study of matter and its interactions. Chemical safety involves practices to prevent accidents and injuries when handling chemicals. Which of the following best describes chemical safety?

• Wearing protective equipment and following safety procedures when handling chemicals

• Ignoring safety rules in the laboratory

• Mixing chemicals without reading labels

• Eating and drinking in the laboratory

Identify the basics of chemical structure.

• Atoms and bonds

• Physical states

• Acid and base strength

• Reaction rates

Tags

NGSS.HS-PS1-3

NGSS.HS-PS1-4

Which of the following correctly explains the differences between solutions, suspensions, and emulsions?

• Solutions are homogeneous mixtures, suspensions are heterogeneous mixtures with visible particles, and emulsions are mixtures of two immiscible liquids.

• Solutions and suspensions are both homogeneous, while emulsions are heterogeneous.

• Suspensions and emulsions are both homogeneous, while solutions are heterogeneous.

• Solutions, suspensions, and emulsions are all the same type of mixture.

Potential hydrogen is measured using which scale?

• Richter scale

• pH scale

• Decibel scale

• Beaufort scale

Neutralization and redox reactions can be summarized as:

• Neutralization involves acid and base forming salt and water; redox involves transfer of electrons.

• Neutralization involves transfer of electrons; redox involves acid and base forming salt and water.

• Both involve only acids and bases.

• Both involve only transfer of protons.

Interpret safety data sheets.

• To understand the hazards and safe handling of chemicals

• To prepare financial reports

• To design marketing strategies

• To conduct employee interviews

What happens when you pour water into a glass and add cooking oil? What does the oil do?

• The oil mixes completely with the water.

• The oil floats on top of the water.

• The oil sinks to the bottom of the glass.

• The oil evaporates immediately.

Make a list of all the products you can find at home and identify them as either acids or alkalis. Which of the following is an example of an alkali?

• Lemon juice

• Vinegar

• Baking soda

• Orange juice

What is one example of a chemical used in beauty products?

• Water

• Sodium lauryl sulfate

• Sugar

• Salt

Mix powdered lemon drink mix with the appropriate amount of water. Observe the powder as it dissolves, creating lemonade. Identify which ingredient is the solute and which is the solvent. In this experiment, the solute is ________ and the solvent is ________.

• solute is powdered lemon drink mix, solvent is water

• solute is water, solvent is powdered lemon drink mix

• solute is lemonade, solvent is powdered lemon drink mix

• solute is water, solvent is lemonade