Required Practical: Obtaining crystals from an acid-base reaction (Chemical Changes)

Question 1

1. Add INSOLUBLE COPPER OXIDE to sulfuric acid in excess and stir… excess copper oxide should be….

Answer 1

visible at the bottom of the beaker as a black powder

Question 2

2. Warm over a Bunsen burner but do NOT…

Answer 2

boil

Question 3

3. The solution will turn ______ as the reaction occurs, showing that copper sulfate is being formed. Excess can still be…

Answer 3

blue

seen

Question 4

4. ______ the solution to remove the excess black copper oxide

Answer 4

filter

Question 5

5. _______ the water so that ______ of copper sulfate form

Answer 5

filter

crystals

Question 6

6. Leave for a period of time as remaining __________ evaporates slowly, leaving larger crystals

Answer 6

water

Question 7

7. Excess solution can be removed by dabbing with…..

Answer 7

filter paper or tissue