Acids and Bases

What is the most common indicator to determine a solution's pH level?

• pH meter

• Litmus

• Bromothymol blue

• Phenolphthalein

What happens when a base molecule splits apart in water?

• It absorbs hydroxide ions

• It releases hydroxide ions

• It releases hydrogen ions

• It absorbs hydrogen ions

Tags

NGSS.MS-PS1-2

What color does litmus turn when it touches an acidic solution?

• Yellow

• Blue

• Green

• Red

Tags

NGSS.MS-PS1-2

Acids always have a lot of what?

• Oxygen molecules

• Hydrogen ions

• Water molecules

• Hydroxide ions

Acids have a pH between ______ and seven.

• ZERO

• 14

• Twelve

• Lots

What taste is caused by acids?

• Sour

• Sweet

• Salty

• Bitter

What is the pH value of a neutral solution?

• 0

• 10

• 7

• 14

What does the word 'acid' come from?

• A Latin word meaning 'sour'

• An Arabic word meaning 'bitter'

• A Greek word meaning 'sharp'

• An English word meaning 'strong'

What can be used to neutralize an upset stomach due to acid?

• Vinegar

• Lemon juice

• Milk of magnesia

• Orange juice

What pH is the strongest base?

• 1

• 7

• 4

• 14