CPIPS

Justin Yang, Jackie nguyen, Faye Rodriguez

Pre Lab Discussion:

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.

Purpose:  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

Materials:

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

Several pieces of glassware

Heating plate

Electronic balance

Procedure:

• Your group will need to write their own procedure for the experiment.

• Use the lecture on error analysis as a guide.

• Include a flow chart that mirrors each step in your procedure

• Remember to include all the equipment that you use in your materials list

Data:

• Create a data table that will include all the masses and volumes that you have measured in the experiment. Make sure there is a data table for each trial.

• Examples: mass of empty beaker, mass of NaCl before experiment, mass of NaCl after experiment, volume of water used, etc.

• If you do more than 1 trial, please include the results for each trial. Use 1 table for each trial.