Acid + Base Reaction

Question 1

what is the word equation for the reaction when bases react with acid?

Answer 1

acid + base -> salt + water

Question 2

what happens to the base in an acid + base reaction?

Answer 2

the base disappears - this is because its used up in the reaction

Question 3

what happens if a salt is soluble in the acid + base reaction?

Answer 3

it will dissolve into the water to form a salt solution

Question 4

method to make salt crystals (zinc sulphate)

Answer 4

1. add excess base (ZnO) to hot acid (H2SO4) - this makes the salt solution (ZnSO4) quickly and ensures all the acid is used up
2. filter out the excess base (ZnO) - the salt solution (ZnSO4) is the filtrate and is collected in an evaporating basin
3. heat the salt solution (ZnSO4) until crystals start to form around the edges - this saturates the solution so that crystals form most efficiently
4. leave the salt solution to crystallise - evaporation of water allows crystals to form