Balance Lab Essay

1111 Words5 Pages
Balance Lab

Your Name Here

Chemistry

July 21, 2010

Introduction:
Using the direct weighing and weighing by difference methods to find weight and mass of chemicals and compounds.
Purpose:
The purpose of this lab was to become familiar with the three different balances and two different methods used to find the weight and mass of chemicals and compounds in the ChemLab program. The lab was performed by using three different types of balances, and the direct weighing and weighing by difference methods.
Materials Used:
2 Centigram Balances
1 High Sensitivity Balance
1 Electronic Balance
2 100ml Beakers
Watch Glass
Slugs
5 Copper Slugs
Sodium Chloride (NaCl)

Experimental Methods:
The slugs were measured by both the direct method and
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At first I was unsure on how these were different but after using the lab program and following the instructions I can now see that different balances are needed for difference situations. Some that may require a more precise measurement where as others may not need such accurate measurements.

The Centigram Balance:
Direct Weighing Mass of slug on a centigram balance using the direct-weighing technique: _2.3g_____ * Mass of the same slug directly on another centigram balance: __2.6g____

Weighing by Difference Weigh the same slug by difference: * Mass of the beaker: __49.2g____ * Mass of the beaker and slug: _52.2g_____ * Calculated mass of the slug by difference: ___3.0g___ * Use the other centigram balance to determine the slug mass by difference: * Mass of the beaker: __49.6g____ * Mass of the beaker and slug: __52.2g____ * Calculated mass of the slug by difference: ___3.4g___ * Weigh an unknown mass on a centigram balance using the
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