Year 7 Sum2 Acids And Alkalis

Question 1

Acid

Answer 1

a substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind.

Question 2

Alkali

Answer 2

a compound with particular chemical properties including turning litmus blue and neutralizing or effervescing with acids; typically, a caustic or corrosive substance of this kind such as lime or soda.

Question 3

Corrosive

Answer 3

A substance that can burn through another substance

Question 4

Concentrated

Answer 4

Concentrated means when something has less water than the main ingredient

Question 5

Dilute

Answer 5

It is when a liquid has more water in it than the main ingredient

Question 6

Indicator

Answer 6

Something that tells you how strong an acid or alkali is.

Question 7

pH scale

Answer 7

The scale that tells you how strong an acid or alkali is. 7 is neutral, 0 is the strongest acid, 14 is the strongest alkali.

Question 8

Neutralisation

Answer 8

Neutralisation is when you use an acid and an alkali is make a neutral liquid. If you had pH 0 acid you would balance that out with pH 14

Question 9

Salt

Answer 9

If you neutralise something you have 2 bi-products, water and salt.