PHYSICAL SCIENCE

MID-TERM EXPERIMENT

Emma Voigt, Reid Trussell, Colton Dillingham

We're testing to see the affect of temperature on the rate that salt dissolves in water.

Background Information

known in some other experiments hot water is known to be a factor that speeds up the reaction like a catalyst. Heat most of the time is a determining factor in the result of an experiment so we believe it could be that could be a factor that applies in our experiment as well.

Hypothesis

The hottest temperature will make the salt dissolve at the fastest rate.

Variables

Constants:


same water

same amount of water

same type of salt

same amount of salt

same burner

same glass beaker

same amount of time on burner


Dependant Variables:

different temperatures on burner


Independant Variables:

amount of time it takes to dissolves salt

Materials

burner

3 beakers

water

salt- 1 teaspoon

stirrer

timer

Procedures

Step 1:


set up beakers to all same amount of water


Step2:


heat each beaker to desired heat to carry out experiment [ one beaker at room temperature, one beaker at 5 on burner, one beaker at 10 on burner ]


Step 3:


once you get each beaker to correct temperature after a minute of heating it on the burner take it off and add 1 teaspoon of salt, to each cup


Step 4:


turn the timer on and stir each one and observe when all the salt is dissolved and stop the timer and rcord the time.


Step 5:


repeat this step 3 times for each of the 3 beakers

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Conclusion

Our hypothesis is correct the warmer the water the faster the water dissolved. we learned that heat or temperate can affect the rate of which the solution can dissolve. Some things we could've improved on was getting an exact temperature for the water and also getting a more precise measure of the amount of salt on the spoon. when making food this helps to completely dissolve the salt into your meal. thanks fr viewing !! hope your days not too salty!

Questions

Would super cooled water make salt dissolve at an extreme rate?


would a different brand of salt dissolve at a different rate?

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