4.4 Practice: Acid/Base

Four substances were tested for pH, lemon juice (pH 2), baking soda (pH 9), bleach (pH 12), and milk (pH 6). Which of the following correctly lists the substances from most basic to acidic?

• lemon juice, milk, baking soda, bleach

• bleach, baking soda, milk, lemon juice

• milk, lemon juice, baking soda, bleach

• baking soda, bleach, lemon juice, milk

Tags

NGSS.MS-PS1-2

Which of these is a property of acidic solutions?

• they taste sour

• they feel slippery

• they are in many cleaning products

• they taste bitter

Acids are substances that release positively charges _________ ions in water

The _______ scale measures the strength of acids and bases.

A sugar solution does not change the color of both blue and red litmus paper. This means the sugar solution is a ________.

• acid

• base

• neutral

What type of reation occurs between an acid and a base?

• Combustion

• Synthesis

• Neutralization

• Double Replacement

The table shows the pH of several solutions. Which solution has the greatest concentration (amount) of H⁺ ions?

• vinegar

• milk

• water

• bleach

Answer explanation

Remember H⁺ is another name for an acid. So, another way to ask this would be; which of these is the strongest acid?

Pollution causes the pH of rain water fall below 6. What is such type of rain called?

• Acid Rain

• Basic Rain

• High pH Rain

• Purple Rain

Answer explanation

Anything below 7 is considered an acid; below 6 is definitely an acid.

Tags

NGSS.HS-LS2-6

Match

• Base

• NaCl

• Salt

• H+

• Acid

• OH-

Match the following

• base

• 7

• neutral

• higher than 7

• acid

• lower than 7