# Solubility of Sodium Chloride by xKzePR0

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```									Solubility of Sodium Chloride
Introduction                       If you add Kool Aid crystals to water the crystals will
dissolve. If you continue to add Kool Aid, you eventually
reach a point where no more crystals will dissolve. The
solution is now said to be saturated. The amount of solute
present in a saturated solution is the solubility of that
solute.

The solubility of a solute in water depends on temperature
of the water e.g. more Jello will dissolver in hot water than
in cold. The table below gives the solubility of sodium
chloride in water at different temperatures.

Solubility of Sodium
Chloride in Water
Temperature              Solubility
( ºC)                (g/100 mL)
0                      31.6
70                    33.0
100                    33.6

Purpose                            To determine the solubility of sodium chloride in water at
room temperature.

Design                             A 10.00 mL sample of saturated sodium chloride solution
will be evaporated to dryness and the mass of sodium
chloride present in that solution will be determined.

Prediction                         Use the data above to plot a graph of solubility vs
temperature for sodium chloride.

Materials                          10 mL pipet                   evaporating basin
Hot plate                     balance
100 mL beaker                 saturated NaCl(aq)
thermometer

204f3cfd-a0f5-471f-87d2-b8efccee8e6e.doc         -1-                                       7/22/12
Procedure                          1. Pour approximately 40 mL of saturated sodium chloride
solution into a 100 mL beaker.

2. Measure and record the temperature of the solution to the
nearest 0.1 ºC.

3. Determine and record the mass of an evaporating basin.

4. Pipet a 10.00 mL sample of saturated solution into the
evaporating basin.

5. Place the basin on the hotplate and heat the solution until
the water has completely evaporated.

6. Allow the basin to cool and then determine the mass of
the basin and its contents.

7. Repeat steps 5 and 6 until the mass is constant.

Volume of saturated solution                   10.00 mL

Temperature of the saturated solution                    ºC

Mass of the evaporating basin                            g

Final mass of the basin and contents                     g

Analysis                            1. Use your graph to predict the solubility of sodium
chloride at room temperature.

2. Use your data to calculate the solubility of sodium
chloride, at room temperature, in g/100mL.

204f3cfd-a0f5-471f-87d2-b8efccee8e6e.doc         -2-                                            7/22/12
Conclusion                         State the solubility of sodium chloride at room temperature
predicted by determining a percentage error.

Evaluation                         If your percentage error exceeded 5%, suggest reasons to
account for the error.

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