pH (Acids/Bases)

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

Bases turn red litmus paper (a)   .

A(n) ______ is a substance with a pH less than 7

• Acid
• Alkaline
• Base
• Buffer

A(n) _______ is a substance with a pH greater than 7.

• Base
• Acid
• Buffer
• Water

A base is a substance

• That releases OH- ions when dissolved in water

• That releases H+ ions when dissolved in water

• Does not release any ions when dissolved in water

• None of the above

An acid

• is a substance that releases H+ ions when dissolved in water

• is a substance that does not release any ions when dissolved in water

• is a substance that releases OH- when dissolved in water

• releases an equal amount of OH- and H+ ions when dissolved in water

Tags

NGSS.MS-PS1-2

A solution has a pH of 7.0.  What would happen to the pH if H ions were added?

• pH would go up
• pH would go down
• pH would stay the same
• None of these

Unsweetened cocoa has a bitter taste. It is most likely which of the following?

• acid
• base
• neutral
• salt

Tags

NGSS.MS-PS1-2

From which point to which point in the pH scale is Base

• 7.1- 14

• 0- 6.9

• 6.2- 9.1

• 12- 14