acid + base reaction

Question 1

bases react with what to form salt and water?

Answer 1

metals

Question 2

what observation occurs in an acid+ base reaction?

Answer 2

the base disappears because it’s used up in the reaction

Question 3

what happens if the salt is soluble?

Answer 3

it dissolves in the water to form a salt solution

Question 4

how to make salt crystals? (1st step)

Answer 4

• add excess base to hot acid- this makes the salt solution quickly and ensures all the acid is used up

Question 5

how to make salt crystals? (second step)

Answer 5

-filter out the excess base
-the salt solution is the filtrate and is collected in an evaporating basin

Question 6

how to make salt crystals? (3rd step)

Answer 6

-heat the salt solution until crystals start to form around the edges
- this saturates the solution so that crystals form more effectively

Question 7

how to make salt crystals? (4th step)?

Answer 7

-leave the salt solution to crystallise
-the collection of water allows crystals to form