Unit 9 Test Review

What is pH?

• how acidic a solution is

• the concentration of potassium ions in a solution

• how basic a solution is

• the concentration of hydrogen ions in a solution

What is the role of water in this illustration?

• It separates the hydrogen ion (H⁺) from the chlorine ion (Cl^–).

• It reacts to form hydrogen (H).

• It keeps things moist.

• It keeps things cool.

Which of the following is a characteristic of a base?

• turns litmus paper red

• is slippery

• tastes sour

• increases amount of hydrogen ions

A base is a solution that can ____________ a hydroxide ion.

• accept

• bond with

• donate

If a solution turns litmus paper red, what type of solution is it?

• an acid

• a neutral solution

• a base

Which substances resist pH changes?

• bases

• hydrogen ions

• acids

• buffers

Which type of reactions form salts?

• highly basic reactions

• neutralization reactions

• highly acidic reactions

What do hydrogen ions (H⁺) and hydroxide ions (OH^–) come together to form?

• water

• a base

• a titrant

• an acid

Tags

NGSS.HS-PS1-7

Which of the following is a strong acid?

• OH^-

• HCl

• NaCl

• NaOH

Which statement best describes an antacid?

• An antacid neutralizes excess hydrogen ions.

• An antacid decreases the level of hydrogen ions.

• An antacid increases the amount of hydrogen ions.