indicators year 7

The pH scale ranges from

• 1-7

• 0-14

• 0-20

• 1-14

______ always have a pH under 7

A pH of 2 would be a

• weak base

• neutral

• strong acid

• weak acid

• strong base

A pH of 8 would be a

• weak base

• neutral

• strong acid

• weak acid

• strong base

What colour is a neutral pH

• Green

• Red

• Orange

• Purple

_____ has a neutral pH

• Bleach

• Water

• Orange Juice

• Blood

Acids AND bases can be corrosive

• True

• False

A change in 1 pH is roughly a change in ____ acidity or alkalinity

• 100x

• 5x

• 10x

• 1x

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 an acid

• Sour substance

• Soapy substance

• Water

• Clay