Data Table 3: Solution of 1.00 g NaCl Volume of NaCl Solution (mL) 8.56 mL Mass of evaprating dish & watch glass(g) 75.893 g Mass of evaporating dish, watch glass, and NaCl solution(g) 78.948 g Mass of evaporting dish, watch glass, and solid NaCl (g) 76.854 g Calculations Show all your work 1. Calculate the volume of 2.00 M NaCl solution needed to obtain 1.00 gram of NaCl. 2. Calculate the mass of NaCl solution used. 3. Calculate the mass NaCl solid (actual NaCl) obtained. 4. Calculate the % yield of NaCl 5. Calculate the % error for the experiment given that the theoretical mass of NaCl = 1.00 g
Data Table 3: Solution of 1.00 g NaCl
| Volume of NaCl Solution (mL) | 8.56 mL |
| Mass of evaprating dish & watch glass(g) | 75.893 g |
| Mass of evaporating dish, watch glass, and NaCl solution(g) | 78.948 g |
| Mass of evaporting dish, watch glass, and solid NaCl (g) | 76.854 g |
Calculations
Show all your work 1. Calculate the volume of 2.00 M NaCl solution needed to obtain 1.00 gram of NaCl. 2. Calculate the mass of NaCl solution used. 3. Calculate the mass NaCl solid (actual NaCl) obtained. 4. Calculate the % yield of NaCl 5. Calculate the % error for the experiment given that the theoretical mass of NaCl = 1.00 g
Results Table 4: Temperature and Solubility
| Temperature | Assumed State (unsaturated, saturated, supersaturated) |
| Room Temp. | |
| ~ 100 degrees Celcius | |
| After cooling | |
| After seeding |
Table 5: Solubility Comparison between NaCl and KNO3
| Compound | Solubility Change With Temp. | ||||
| Heating | Cooling | ||||
| Small or large | Increase or decrease | Small or Large | Increase or Decrease | ||
| NaCl | |||||
| KNO3 |
Table 6: Isolation of 1.00 g NaCl
| Mass NaCl liquid (g) | |
| Mass Nacl solid (g) | |
| % Yield | |
| % Error |
Conclusion
1. Compare the solubility vs temperature changes for NaCl and KNO3.
2. Compare the actual amount of NaCl you isolated to the 1.00 gram target value and give your percent error
Questions
1. What are 2 reasons why the actual amount of NaCl you collected is different from the theoretical yield?
2. Use Table 3 (NaCl solid and liquid mass) to calculate the % NaCl (by mass) of 2.00 M NaCl
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