PH Indicators

Litmus paper is an indicator of acids and bases, it turns red for bases.

• True
• false

Bases will turn litmus paper __________, while acids will turn litmus paper __________.

• blue.....red
• red.....blue
• pink.........colourless
• colourless..........pink

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

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

What is a substance that is one color in an acid and another color in a base? 

• Oxidizer
• Indicator

What color does litmus paper turn in the presence of an acid?

• Red
• Blue

The pH of a strong acid would be:

• 1-2
• 5-6
• 8-9
• 12-13

The pH of a strong base would be:

• 1-2
• 5-6
• 8-9
• 13-14

The pH of a weak base would be:

• 1-2
• 5-6
• 8-9
• 12-13

The pH of a weak acid would be:

• 1-2
• 5-6
• 8-9
• 12-13

According to the image, the substance tested is a...

• Acid
• Neutral
• Strong Acid
• Base