Acids, Bases, pH Formative Review-- Part 1

A certain solution has a pH of 2.75. Which of the following is probably dissolved in the solution?

• NaOH

• H2SO4

• NaCl

a pH of 14 is a

• weak base

• strong base

• strong acid

• weak acid

A scientist observes that an unknown solution turns blue litmus paper red and reacts with zinc to produce hydrogen gas. Which of the following best describes the unknown solution?

• a colloid

• an acid

• a base

• a suspension

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Acids and bases react together to neutralize each other. For example, HCl + NaOH --> H2O + NaCl. What type of reaction is a neutralization reaction?

• Single replacement

• Double replacement

• Synthesis

• Combustion

Basic solutions feel slippery and taste sour.

• True

• False

In water, acids form,

• Hydroxide ions

• hydrogen gas

• neutral compounds

• hydronium ions

Tags

NGSS.MS-PS1-5

Normal rainfall is slightly acidic, which means its pH is most likely

• 1-2

• 5-6

• 8-9

• 10-12

pH measures the concentration of hydrogen ions in a solution. Using your knowledge of acids and bases, answer the following question. Which of the following pH values indicates a solution with the highest concentration of hydrogen ions?

• 1

• 2

• 9

• 14

Suppose you have a solution that is either an acid or a base. It doesn't react with any metals. Is the pH of the solution more likely to be a 4 or a 9?

• 4

• 9

• Not enough information is given.

The dissociation of hydroxide ions is caused by adding a ____ to water

• gas

• base

• salt

• acid