Evaporation - Separating a Solid Dissolve in a Liquid

Today we are working about evaporation.

Aim: To separate a solute from a solvent in a solution using evaporation.

Method:

1.  Set up the Bunsen Burner, tripod and gauze mat. Don't place the Bunsen Burner under the tripod yet.

2.  Add approximately 50 mL of hot water to your beaker and place it on top of the tripod, on the gauze mat.

3.  Add enough copper sulphate solution to quarter fill the evaporating basin.

4. Carefully place the evaporating basin on top of the beaker.

5. Light your Bunsen Burner. Open the air hole and gently push the Bunsen Burner solute are forming.

6.  Heat the solution until most of the solvent has been evaporated and crystals of solute are forming.

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Observations:  As the water boiled, the steam heated the evaporating basin causing the copper sulfate solution to evaporate. It's the water left the basin, small crystals of solid copper sulfate were left deposited around the basin.

1. Outline two factors that affect the speed of evaporation ( i . e how can the speed of evaporation be increased? ).

(  a  )  Temperature  ( higher temp  =  faster evaporation )

(  b  )  Surface area  ( greater surface area  =  faster evaporation ) 

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Results: 

Discussion:  As we heat the water with the Bunsen burner, the water evaporates and form the solution. As the solvent evaporates, the solute form the solution with the help of Bunsen burner and evaporation, we leave the blue crystal for about 2 days and form the copper sulphate.