Acid-Base Indicators

Acid-Base Indicators

By gilson granil

Indicators are substances that change to different colors when exposed to acids and bases.

Multiple Choice

What do acids do to red litmus paper?

• Turn it Red 
• Turn it Blue

Multiple Choice

What do bases do to red litmus paper?

• Turn it Red 
• Turn it Blue

It has a chemical that changes color when it is mixed with an acid or a base.

Red Cabbage Indicator

It turns colorless in acidic solutions and pink in basic solutions..

Phenolpthalein Indicator

Other Examples of Indicators

Multiple Choice

When phenolpthalein indicator is used on acids, it will turn __________.

• colorless

• pink

Multiple Choice

Phenolphthalein changes colour to ___________ in an alkaline.

• Colourless

• Blue

• Pink

The pH Scale

​The pH scale is a tool used to measure how acidic or alkaline a substance is.

• The strength of an acid is called ACIDITY.

• The strength of a base is called ALKANITY.

Multiple Choice

The pH scale is a range from:

• 1-7
• 0-14
• 1-14
• 1-20

Multiple Choice

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

• Acid
• Alkaline
• Base

Multiple Choice

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

• Base
• Acid
• Water

Poll

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