Acids and Bases

The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?

• 3
• 9
• 7
• 5

Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?

• strongly acidic
• slightly acidic
• strongly basic
• slightly basic

Tags

NGSS.MS-PS1-2

Which of these pH values would indicate that a solution is a weak base?

• 4
• 5.6
• 8
• 13

When dissolved in water, acids produce:

• bases
• salts
• hydrogen ions
• hydroxide ions

Tags

NGSS.MS-PS1-2

Which type of ion does a base produce when it is dissolved in water?

• oxide
• oxygen
• hydrogen
• hydroxide

Tags

NGSS.MS-PS1-2

Which of the following is true about acids and bases?

• The lower the pH, the stronger the acid
• the higher the pH, the stronger the acid
• The lower the pH, the more neutral the acid
• The higher the pH, the weaker the base

Explain what happens when a strong acid and a strong base are poured into the same container.

• they form separate layers
• they mix physically but not chemically
• they break apart into separate elements
• they react chemically to form a salt

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which food is the most acidic?

• bananas
• lemon juice
• orange juice

On the pH scale what numbers are bases?

• 8-14
• 0-7
• 7
• 1

On the pH scale what numbers are acids?

• 8-14
• 0-7
• 7
• 1