Unit 5 Review

What is the pH range of acids?

• Between 7 and 14

• Exactly 7

• Above 7

• Below 7

What does a pH meter measure?

• Temperature

• Acidity or alkalinity (base)

• Pressure

• Volume

Which of the following substances is acidic?

• Ammonia

• Soap

• Lemon juice

• Baking soda

What is the pH of a neutral solution?

• 7

• 0

• 14

• 1

Which of the following substances is most likely to be a base?

• Lemon juice (pH 2)

• Vinegar (pH 3)

• Pure water (pH 7)

• Baking soda solution (pH 9)

A compound is defined as:

• A substance made of two or more elements chemically combined.

• A substance made of only one type of atom.

• A mixture of two or more substances

• A type of heterogeneous mixture.

Tags

NGSS.MS-PS1-1

What type of mixture is lemonade (without pulp)?

• Heterogeneous

• Homogeneous

• Element

• Compound

Which statement is true about a heterogeneous mixture?

• It has a uniform composition throughout.

• Its components are evenly distributed.

• It can be separated by physical means.

• It has a fixed chemical formula.

Which of the following best describes a mixture?

• A chemical combination of elements

• A physical blend of two or more substances

• A substance with a fixed ratio of elements

• A new substance formed through chemical bonding

Which statement is true about compounds?

• They can be separated by physical means.

• They consist of two or more elements chemically bonded together.

• They have variable compositions.

• They are always in solid form.

Tags

NGSS.MS-PS1-5