Required Practical 1 - Making A Salt From An Insoluble Oxide Or Carbonate✔️

Question 1

What is the method - give the first 2 steps?

Answer 1

1) add insoluble copper oxide to a beaker of sulfuric acid - warm gently on a tripod and gauze (do not boil) and stir

2) soution turns blue as reaction occurs showing copper sulfate is formed - excess black copper oxide can be seen

Question 2

Why do we leave the water to evaporate slowly instead of continuing to eat?

Answer 2

Will produce bigger crystals

Question 3

Safety for the experiment?

Answer 3

• wear eye protection
• chemicals involved are harmful - be carefull
• only warm acid gently - do not boil

Question 4

List of the equipment used?

Answer 4

• Copper(II) oxdie
• Sulfuric acid
• 100 cm3 beakers
• (x2), glass rod
• Tripod, gauze, Bunsen burner, heat proof mat
• Filter funnel
• filter paper
• conical flask
• Evaporating basin

Question 5

What is the method - give steps 3 and 4?

Answer 5

3) when the reaction is complete filter solution (using filter paper and filter funnel) to remove excess copper oxide

4) evaporate the water so that crystals of copper sulfate start to form - stop heating when you see the first crystals appear then leave the rest to evaporate slowly in an evaporating basin - any small excess of solution can be removed by dabbing with filter paper

Question 6

When should you stop evaporating the water?

Answer 6

When you see the first crystals start to appear at the edge of the solution - when this happens leave the rest to evaporate slowly in an evaporating basin ideally by a window