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Our favorite part of the experiment is that we got to see how salt and water mix together and when the water boiled, we got to see how the salt wasn't gone, but it turned back to its original form.

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4.I think its the math calculations which determined which was what. I think it was critical thinker and problem solver because it helps us think about the problem and then solve it.

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3. If the percent error was negative then we must have done something wrong when we were adding and subtracting or we lose too much salt in the process.

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2. The reasons why we didn't get a 0% error was because we lost too many salt either from transferring the salt and water from the flask to the beaker.

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Trail #3

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Trail #2

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1. Trail #1

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- electronic balance

used to measure the grams of each step or object

- water

to help make the salt dissolve

- heating plate

to heat up the beaker which was containing salt and water to separate the salt from the water.

- flask

to stir and dissolve the salt from shaking it

- beaker

to put it on the heating plate, so it can separate the salt and water

- tong

to remove the beaker from the heating plate

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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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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.