The Effect of Water Temperature on the Time Taken to Dissolve Salt

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Independent Research Task- Ellen Ryan

The Effect of Water Temperature on the time taken to dissolve Salt

Aim: To see the effect of water temperature on salt.

Hypothesis: If the temperature of the water is increased the time taken for the salt to dissolve completely will be shorter.

Equipment
Heat proof mat
Tripod
Bunsen burner
Gauze mat
Electronic Balance
2 beakers
Measuring cylinder
Salt
Water
Stirring rod
Thermometer
Safety glasses
Stopwatch
Plastic spoon

Method:
Take beaker and fill with 100ml of water
Measure 5 grams of salt, put aside
Place beaker over Bunsen burner
Hold thermometer just above base of beaker
Heat to desired temperature
Remove from Bunsen burner and place on heat proof mat
Add prepared salt and start timer
Use stirring rod to stir until salt is dissolved
Stop timer and record time
Repeat process three times over to ensure it is a fair test Repeat entire method for each temperature

Temperature
(Degrees Celsius)Time Taken(Seconds)
Test 1Test 2Test 3Average
20
92909391.7
40
49486749
60
33293131
80
24392625
100
18171617



Discussion:

Results:
The results of this experiment show that salt dissolves quicker in water with a higher temperature. In the 15 tests that were completed, only two were unreliable proving the theory that was given in the hypothesis and completing the aim of the experiment. Errors:

Errors that occurred within the experiment were such as overheating the water, and having to begin again, adding to much salt to the heated water and forgetting to start the timer after having put salt in the heated water. Improvements:

Improvement that could have been made are

Conclusion

As proved in the experiment the time taken for salt to dissolve is shorter the higher the water temperature is. The...
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