Year 7 Acids and Alkalis

Which substance is an acid?

• Water

• Bleach

• Orange juice

• Washing powder

What is the meaning of the above hazard warning symbol?

• Corrosive

• Explosive

• Toxic

• Radioactive

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which substance is alkali?

• Toothpaste

• Vinegar

• Lemon juice

• Soft drink

A solution with a pH of 3.6 would be...

• Acid
• Base
• Neutral
• Acid and Base

Universal indicator will

• turn red with bleach

• turn green with cola

• identify weak and strong pH

• turn red in an alkaline solution

How would you describe a solution of pH 8?

• Neutral

• Weak alkali

• Weak acid

• Strong acid

What is the correct description of how an acid and alkali react?

• Acidification

• Naturalisation

• Neutralisation

• Alkalisation

What pH best describes a neutral solution?

• 0

• 1

• 7

• 14

What colour does litmus paper turn when added to an alkali?

• Blue

• Red

• Green

• Colourless

What colour does litmus paper turn when added to an acid?

• Blue

• Red

• Green

• Colourless