Rate of Dissolving Lab Procedures

Procedure #1 - Independent Variable: Temperature

1.       Fill 2 beakers with 200ml of water

2.       Label the beakers “A” and “B”

3.       Heat beaker A until boiling and then remove from hot plate

4.       Use a thermometer to record the water temperature in each beaker

5.       At the same time, add 5ml of granulated sugar into each beaker and begin timing the rate of dissolving

6.       Record observations

Procedure #2 – Independent Variable: Stirring

1.       Fill 2 beakers with 200ml of water

2.       Label the beakers “A” and “B”

3.       Use a thermometer to record the water temperature in each beaker

4.       At the same time, add 5ml of granulated sugar into each beaker and begin timer

5.       Using a straw, stir beaker A once every 5 seconds for one minute

6.       Record your observations

Procedure #3 – Independent Variable: Particle Size

1.       Fill 2 beakers with 200ml of water

2.       Label the beakers “A” and “B”

3.       Heat both beakers on one hot plate until boiling

4.       Use a thermometer to record the water temperature in each beaker

5.       At the same time, add 2 ml of table salt to beaker A and 2 ml of coarse salt to beaker B and begin timing

6.       Record your observations