Acids & Alkalis

Are ALL acids corrosive?

• Yes

• No

What does an indicator do?

• It tells us whether a substance is an acid or alkali

• It tells us what the substance is made out of

• It tells us whether a substance is cold or hot

On the pH scale, what is 14?

• A weak alkali

• A strong acid

• A strong alkali

• A weak acid

What color would red litmus paper be when touching an alkali?

• The paper disappear

• It would stay red

• It would turn blue

• It would turn purple

What color would blue litmus paper be when touching an acid?

• It would stay the same

• It would be purple

• It would be red

Why would bicarbonate of soda be used to neutralize a bee sting?

• Because bee stings are a strong alkali, so a strong alkali is needed to neutralize it

• Because bees hate bicarbonate of soda

• Because bee stings are a weak acid so to neutralize it, you will need a weak alkali

What are the properties of alkalis?

• Soapy touch

• Sour taste

• Bitter taste

• A pH of 6 or below

• A pH of 8 or above

What are the properties of acids?

• Sweet taste

• Sour taste

• A pH of 6 or below

• Spicy taste

A solute is...

• The substance that is dissolved

• A mixture made by dissolving a substance in a liquid

• The liquid that does the dissolving

• A type of indicator

What word means 'unable to dissolve'?

• Solvent

• Soluble

• Insoluble

• Solution