Pats 5 Effect of temperature on rate of dissolving
1. Weigh two 0.5 g samples of fine powder NaCl.
2. Add 50 mL of hot water and water to two 100 mL beakers.
3. Add 0.5 g samples of NaCl to the hot water in the beaker. Observe and record the time when NaCl is dissolve.
4. Tilt in back and forth, and record which layer is denser.
5. Repeat step 1-4 for cold water in another beaker.
6. Dispose of all solutions in the sink.