Strength of Acids and Alkalis

Arrange the following substances in increasing order of acid strength.

• Pineapple juice(pH 4), Fresh milk(pH 6), Vinegar(pH 2)

• Fresh milk(pH 6), Pineapple juice(pH 4), Vinegar(pH 2)

• Vinegar(pH 2), Pineapple juice(pH 4), Fresh milk(pH 6)

Tags

NGSS.MS-PS1-2

Acids change blue litmus paper from

• blue to red

• red to blue

Something that can be used to identify acid/alkali:

• Indicator

• Oxidator

• Reductor

• Terminator

Which indicator measures the strength of the acids or alkali?

• litmus paper

• pH scale

• phenolphthalein

• red cabbage juice.

Alkali could also be known as

• Acid

• Weak acid

• Base

• Maze

Which colour in the indicator means neutral?

• Blue

• Green

• Yellow

• Red

What measurement of the pH scale is considered a weak acid liquid?

• 1

• 8

• 5

• 12

Tags

NGSS.MS-PS1-2

True or False: Acids with a low pH and bases with a high pH are considered very dangerous.

• True

• False

Tags

NGSS.MS-PS1-2

Which of the following substances contain an alkali?

• Vinegar

• Baking soda

• Distilled water

• Coca-cola

Which of the substances below is used to cure an alkali?

• Strong Acid

• Weak acid

• Strong Alkali

Tags

NGSS.MS-PS1-2