Experiment 6 - Solutions

Procedure:

Part A - Determine the Concentration of a Saturated Solution of Sodium Chloride

1. Weigh a clean, dry evaporating dish using a top loading balance.
2. Use a 10 mL graduated cylinder to obtain approximately 8.0 mL of saturated sodium chloride solution and put it into the dish. Record the volume of the solution to the correct number of significant figures on the data sheet.
3. 
   

   Place the evaporating dish on a 250 mL beaker that is filled with about 150 mL tap water. Heat the beaker on a hot plate and continue boiling the water in the beaker until the solution in the evaporating dish has evaporated to dryness. Add more water to the beaker as needed.

   
   
4. Remove the evaporating dish; dry the bottom of the dish with a paper towel. Place the dish in a 100^oC drying oven for about 20 minutes to remove the last traces of water.
   
   
5. Allow the dish to cool in a desicooler for about 10 minutes and then re-weigh.

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