Reactivity of Halide Ions

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Reactivity of Halide Ions

PURPOSE
The purpose of this experiment is to observe the reactions of halide ions with different reagents by mixing them together.

Materials
0.1 M AgNO3
0.1 M NaCl
0.1 M NaF
0.2 M KBr
0.2 M Na2S2O3
3% Starch Solution
4.0 M NH3 (aq)
5% NaClO (commercial bleach)
24 – well microplate
thin – stemmed pipettes, 12

Safety

DATA
|PARTS |INITIAL MASS |FINAL MASS |CHANGE IN MASS | | | | | | |1 |119.9g |118.6g |1.4g | | | | | | |2 |162.7g |162.6g |0.1g | | | | | |

THEORY/PRINCIPLE
The law of conservation of mass states that matter is neither created nor destroyed during a chemical reaction and that the mass of a system should therefore remain constant during any chemical process.

EXPERIMENTAL
The procedures for this experiment were simple enough to setup and follow. There were some confusion at first but as we read the manual it become clearer every time. The procedure is exactly in the manual.

CALCULATIONS

Vinegars mass (g)* + Baking soda’s mass (g)= Initial Mass

Initial Mass – Final Mass= Change in Mass

% error= | actual – theoretical | x 100
actual
*The vinegars mass (50 mL) includes the mass of the beaker which is 68g.

CONCLUSION/DISCUSSION
In this lab we learned that the law of conservation of mass only works when the reactants are enclosed. An example to this is in Part 2...
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