Question 73
The table gives the names, colours and solubility in water of four compounds.
| Name | Colour | Solubility in water |
|---|---|---|
| sodium chloride | white | soluble |
| zinc carbonate | white | insoluble |
| iron sulfate | green | soluble |
| copper carbonate | green | insoluble |
The compounds were added to separate beakers of water. There was enough water to dissolve the soluble compounds completely. The contents of each beaker were filtered.
Describe how you could obtain pure crystals of iron sulfate from a mixture of copper carbonate and iron sulfate.
| Name | Colour | Solubility in water |
|---|---|---|
| sodium chloride | white | soluble |
| zinc carbonate | white | insoluble |
| iron sulfate | green | soluble |
| copper carbonate | green | insoluble |
The compounds were added to separate beakers of water. There was enough water to dissolve the soluble compounds completely. The contents of each beaker were filtered.
Describe how you could obtain pure crystals of iron sulfate from a mixture of copper carbonate and iron sulfate.
