Identifying Acids & Bases

Litmus paper turns from red to blue in

• acids

• bases

• water

Tags

NGSS.MS-PS1-2

Phenolphthalein turns from pink to colorless in

• acids

• bases

• water

Tags

NGSS.MS-PS1-2

A chemical that changes color in acids and bases is called

• an indicator

• a metal

• a non-metal

Which properties are acids? (select all that apply)

• Taste sour

• Feels slippery

• Reacts with metals to produce hydrogen (H)

• Turns methyl red to yellow

• Turns litmus red

Tags

NGSS.MS-PS1-2

Which properties are bases? (select all that apply)

• Taste bitter

• Feels slippery

• Reacts with metals to produce hydrogen (H)

• Turns methyl red to yellow

• Turns litmus blue

On the pH scale, where can you find the most dangerous acids and bases?

• in the middle

• towards the top

• on both ends of the scale

On the pH scale, which number identifies a neutral substance?

• 1

• 100

• 7

Which is a basic substance, black coffee or eggs?

• black coffee

• eggs

Why should you never taste or touch an unknown substance?

• Because it would be gross

• It could be dangerous

• Why not, YOLO

Which substance is more acidic, oranges or bananas?

• oranges

• bananas

• apples