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Effects of solubility at certain temperatures: series 1 Abstract There were many things to be observed in this lab. The over all reason of this lab was to find out the temperatures at which sodium nitrate was no longer a saturated solution. To find this we took different amounts of potassium nitrate and heated them up until they were completely dissolved and waited for them to cool to a temperature in which the solution was no longer fully saturated. My overall conclusion of this experiment id that knee becomes more soluble at higher temperatures and less at lower temperatures. Procedure
Series’ 1 results corresponded well with the data of series 2. Through out the experiment all solutions became saturated by completely dissolving into the water and none became supersaturated by reaching the temperature in which they start crystallizing and becoming unsaturated. But the graphs produced by the experimental results were not perfect for many reasons. Delayed temperature readings could cause the value of solutions to start to become unsaturated as soon as it happens can also affect the results. Not using constant masses when measuring the amount of water used may also contribute to error.
If evaporation occurred during the saturating process it could have changed the validity of the solubility to that original amount of water. This would end up making the temperature higher than it needed to be. What I concluded from this experiment was that potassium nitrate’s solubility increases when its temperature increases. Observations and calculations Quantitative observations: Test tube A took significantly longer than either test tubes B or C to become unsaturated. All solutions dissolved at different rates. No apparent chemical reactions occurred. Qualitative observations; Series 1 data table Series 2 data table