Recrystallization Experiment CPIPS period 1 Group 8 by Omar Anguiano [Student FVHS]

Materials

OmarAnguiano — 2013-11-14 16:50:25 UTC

1 Beaker

1 Flask

1 Graduated Cyinder

1 Rubber Tongs

1 Watch Glass

1 Heating Plate

1 Scale

Salt (1 to 2 grams)

Procedures

OmarAnguiano — 2013-11-14 16:52:01 UTC

The Beaker

17gonzaleser248 — 2013-11-15 16:24:09 UTC

Used to hold the salt-water

The Scale

17gonzaleser248 — 2013-11-15 16:42:24 UTC

Used to weigh the salt and beaker

The Watch Glass

17gonzaleser248 — 2013-11-15 16:43:39 UTC

Used to cover the beaker while it is heating

The Heating Plate

17gonzaleser248 — 2013-11-15 16:44:20 UTC

Used to evaporate the water

The Tongs

17gonzaleser248 — 2013-11-15 16:46:38 UTC

Used to hold the Beaker

The Graduated Cylinder

17gonzaleser248 — 2013-11-15 16:48:22 UTC

Used to hold the water

The Flask

17gonzaleser248 — 2013-11-15 16:51:02 UTC

Used to dissolve the salt in water

OmarAnguiano — 2013-11-18 17:02:28 UTC

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.

OmarAnguiano — 2013-11-18 17:02:55 UTC

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

OmarAnguiano — 2013-11-18 17:05:58 UTC

First, we weighed the salt between 1 and 2 grams

OmarAnguiano — 2013-11-18 17:07:11 UTC

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

Problems and Conclusion

OmarAnguiano — 2013-11-18 17:09:24 UTC

Trial 1

17gonzaleser248 — 2013-11-18 17:36:08 UTC

Trial 2

17gonzaleser248 — 2013-11-18 17:37:19 UTC

Data Tables

OmarAnguiano — 2013-11-19 16:15:48 UTC

click to open

Trial 3

OmarAnguiano — 2013-11-19 16:24:03 UTC

1

OmarAnguiano — 2013-11-19 16:28:27 UTC

2

OmarAnguiano — 2013-11-19 16:28:47 UTC

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

3

OmarAnguiano — 2013-11-19 16:28:50 UTC

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

Prelab Disscussion

17gonzaleser248 — 2013-11-19 16:33:24 UTC

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.

4

OmarAnguiano — 2013-11-19 16:36:09 UTC

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.

Purpose:

17gonzaleser248 — 2013-11-19 16:51:04 UTC

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