RP making soluble salts

Question 1

method

Answer 1

1. measure 40cm³ sulfuric acid into a measuring cylinder and pour into a beaker
2. heat the acid gently using a bunsen burner
3. use a spatula to add copper oxide in excess and stir with a glass rod
4. filter the solution using filter paper and a funnel into a conical flask
5. pour the filtrate into an evaporating basin
6. evaporate the filtrate gently using a water bath until crystals start to form
7. leave the evaporating dish to cool for 24 hours
8. gently pat the crystals

Question 2

equipment list

Answer 2

-dilute sulfuric acid
-copper oxide powder
-spatula
-glass rod
-measuring cylinder
-beaker
-bunsen burner
-tripod
-gauze
-heatproof mat
-filter funnel and paper
-conical flask
-evaporating dish

Question 3

safety

Answer 3

-goggles as sulfuric acid is corrosive
-hair tied back (bunsen burner)
-glassware
-bunsen burner on safety flame when not in use

Question 4

symbol equation for reaction

Answer 4

CuO + H₂SO₄ –> CuSO₄ + H₂O

Question 5

two methods of separating mixtures used

Answer 5

filtration
crystallisation

Question 6

how can you separate an insoluble product from a solution?

Answer 6

filtration

Question 7

how can you separate soluble solids from solutions?

Answer 7

evaporation

Question 8

how could you separate a soluble solid from a solution if the solid decomposes when heated?

Answer 8

crystallisation