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The mass of the flask is 129.41 grams.

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The mass of the watch glass is 62.48 grams.

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Synthesize the information, skills, and concepts acquired through the curriculum. It's addressed in this activity because we combined our various data and used it to make an answer.

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The sources of error could be that there was some water that didn't dry yet or added too much water.

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The sources of error could be that some salt was stuck on the watch glass while boiling or the boiling bubbles splashed out of the beaker.

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Percent error

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Percent error

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Percent error

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The beaker and watch glass on a heater.

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The overview of the beaker.

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The mass of the recrystallized NaCl with the beaker is 161.16 grams.

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The weight of the beaker itself is 159.65 grams.

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The mass of the NaCl inside the beaker is 1.56 grams.

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NaCl being recrystallized.

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NaCl. Use a mass of about 1-2 grams.

Several pieces of glassware

Heating plate

Electronic balance
Water. Use about 25 mL

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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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You will learn to

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