C5.5 - Salts From Insoluble Bases (Finished)

Question 1

What are bases?

Answer 1

Compounds that can neutralise acids (pH greater than 7)

Question 2

What are alkalis?

Answer 2

Bases that are soluble in water

Question 3

What is the general formula for a reaction between an acid and a base?

Answer 3

Acid + base -> salt + water

Question 4

What type of reaction is the reaction between an acid and base?

Answer 4

Neutralisation reaction

Question 5

What is produced when an acid and metal carbonate react?

Answer 5

Salt, water and carbon dioxide

Question 6

Metal carbonates are also ___

Answer 6

Bases

Question 7

What are salts made up of?

Answer 7

Mositive metal ions and a negative ion from an acid

Question 8

Why can you work out the formula of a salt knowing it’s ions?

Answer 8

Salts have no overall charge (as all ionic compounds) so once you know the charges of the ions that make up the salts you can work out its formula

Question 9

Make a balanced equation for the reaction between sulphuric acid (H2SO4) and the insoluble base copper (II) oxide (CuO)

Answer 9

H2SO4 (aq) + CuO (s) -> CuSo4 (aq) + H2O (l)

Question 10

How would you make a soluble salt using an insoluble base?

Answer 10

1) Gently warm the dilute acid with a Bunsen Burner
2) Add the insoluble base to the acid a bit at a time till it is neutralised (the excess solid just sinks even after stirring)
3) Filter out the excess solid with a filter paper, funnel, flask to get the salt solution
4) do crystalization