What is the most likely pH of a tube of toothpaste?

• 3
• 5
• 7
• 10

Which of these substances is acidic?

• tap water
• lemon
• ammonia
• baking soda

What might happen if you mixed a strong acid with an equally strong base?

• You would see an explosive chemical reaction.
• The acid would destroy the base.
• The base would destroy the acid.
• You'd wind up with a pH-neutral substance.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

An extremely strong base would have a pH of:

• 1
• 7
• 9
• 14

This piece of pH paper has been dipped into:

• An acid
• A base
• A pH-neutral substance
• A buffer

What might happen if acidic chemicals were emitted into the air by factories?  Choose the best answer.

• The acid would destroy metallic elements in the air.
• The acid would be neutralized by bases within clouds.
• Acid rain might destroy ecosystems and farmland.
• Violent chemical reactions would take place within the atmosphere.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Healthy environments for life have a pH closest to:

• 1
• 3
• 7
• 10

Which of the following substances is basic?

• soda
• lemon juice
• soap
• vinegar

What is a property of bases?

• Slippery touch
• Sour taste
• Ability to dissolve metal
• Ability to form hydronium ions

How do acidic solutions taste?

• Delicious
• Sweet
• Bitter
• Sour