Science: Making salts

Making Salts 

Aim: To produce copper sulfate by reacting copper with an acid.

Equipment: Copper oxide powder, dilute (0.5 mol L-1)sulfuric acid,50 ml measuring cylinder, two 100 ml beakers, Bunsen burner, tripod, gauze mat, funnel, filter paper, Thermometer, Spatula, evaporating basin, stirring rod.
Method:

1. Add 20 ml of sulfuric acid to a 100 ml beakers. heat the acid until it reaches 70℃. Turn off your Bunsen burner.
2. Once heated, use a spatula to add pea-sized portions of copper oxide to the beaker. Stir the mixture for 30 seconds.
3. Repeat step 2 until no more will dissolve. Allow the beaker to cool.
4. Fold the filter paper and place in the fennel. Place the filter funnel into the seconds beaker.
5. Make sure the beaker is cool enough to hold at the top. The contents should still be hot. you may need your teacher to complete this step.
6. Gently swirl the contents of the beakers to mix, and then pour into the filter paper in the funnel. Allow to filter through.
7. Rinse the beaker you used to heat the mixture previously, and place it back on top of your tripod filled with 50-60 ml of water.
8. Place the evaporating basin on top of the beaker and carefully pour some of the solution from the beaker into the evaporating basin.
9. Gently heat the beaker until solution in the evaporating basin has reduced by half.
10. Leave the evaporating basin to cool. Once cool, move the evaporating basin to a warn place where it will not be disturbed(i.e a window-sill) and observe over the next few days. Blue copper sulfate crystals should form.

Observation: When we were mixing the pea-sized in sulfuric acid it dissolve it and turn to black and when we put it on beaker and it turn to blue.

Copper oxide + Sulfuric acid → Copper fulfate + water.