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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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The ESLR's that were mainly used were Self- DIrected Learner and Critical Thinker because we applied our knowledge to solve a problem and we incorporated information and knowledge in a dynamic world.

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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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If my percent error was negative it could have been because we left some of the salt on the watch glass.

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If my percent was positive it could have been because we left some water in our beaker when we weighed it on the scale.

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click to open

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Then, we put the salt in the flask and mixed it until the salt dissolved into the water.

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First, we weighed the salt between 1 and 2 grams

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Lastly, we observed our results and weighed the salt and beaker to get our results.

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Next, we put the salt and water on the heating plate and covered the beaker with the watch glass and observed it until the water was gone.

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Used to dissolve the salt in water

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Used to hold the water

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Used to hold the Beaker

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Used to evaporate the water

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Used to cover the beaker while it is heating

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Used to weigh the salt and beaker

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Used to hold the salt-water

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1 Beaker

1 Flask

1 Graduated Cyinder

1 Rubber Tongs

1 Watch Glass

1 Heating Plate

1 Scale

Salt (1 to 2 grams)