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The ESLR that addresses this experiment well is, "access and process information utilizing current technology."  This ESLR works well because we used many computer programs such as the Daum Equation Editor,
Padlet, and Canvas.  We also used the electronic gram scale.   Technology is advancing at such a quick pace around the world that it is useful and necessary to utilize all computer programs and technology on a regular basis in order to compete with an ever growing population

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One of our percent errors was negative.  This means that we gained salt while we were recrystallizing the salt.  One way this could have happened was that we didn't let the beaker boil long enough so when we weighed it some of the water could have raised the calculation.  Water can be very heavy, it is a lot heavier then salt.  Another way was that we didn't clean out the beaker or the flask well enough so there was salt in them before we even started the experiment.

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Two of our percent errors were positive.  This means that we lost salt while we were recrystallizing the salt.  This could have happened when all the water in the beaker was almost gone and the salt particles popped up onto the watch glass that was covering the beaker.  We could of also lost salt because when we were weighing the beaker salt could have been on the scale therefore our calculations could have been misread.

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Percent errors are next to each trial.

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To perform and master a recrystallization of an ionic compound

To write a procedure for a simple experiment

To calculate for percent error in an experiment

To understand how results affect percent error

To identify sources of error in experiments

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1) weigh the flask and beaker with nothing in it

2) fill the flask with salt in between 1-2 grams of salt

3) fill the water with 25mL of water

4) pour the water into the flask to dissolve the salt into the water

5) pour the salt water into the beaker

6) place the beaker on the heating pad and the watch glass on top of the beaker to act as a lid.

7) ait for the water to boil

8) once the water is gone you then take the beaker off of the heating pad using the tongs

9) cool down the beaker until you are able to hold it

10) weigh the beaker with the recrystallized salt

11) calculate the percent error

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Materials

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Recrystallization is one way of isolating an ionic compound from a solution. If several ionic compounds are present in an aqueous solution, then a precipitation reaction may be performed to remove the unwanted ions. In this experiment, a known amount of NaCl will be dissolved in some water, and then recrystallized by boiling off the water.

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Ryan Limbach

Adam Trounce

Rebecca Luna