Acid bases chem. part 1

A substance is found to have the following characteristics:

Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water

In what category would the substance be classified?

• acid

• base

• enzyme

• fatty acid

Which of these pH values represent an acid?

• 4

• 8

• 10

• 12

Milk is a very weak acid. What might its pH value be?

• 6.5

• 7.8

• 4.2

• 12.2

Tags

NGSS.MS-PS1-2

When acids react with metals, they produce hydrogen gas and salt.

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a property of a base?

• bitter taste

• reacts with metals

• salty

• sour taste

The strongest bases have pH values close to

• 0

• 14

• 7

• 5

Ocean water is only slightly basic. What might its pH value be?

• 5

• 8

• 12

• 2

An indicator will ______________ when it is in contact with an acid or base

• Bubble
• Form a new substance
• Change color
• Stay the same color

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

What does the pH scale measure?

• the concentration of acids and bases
• the malleability of a metal
• the temperature of the water in a swimming pool
• the amount of phosphorus in a compound