Halide Test Lab Report

Testable Question:
What will happen to different halide salts found in the body if various compounds are added to the halide? How will the halides react?
Introduction:
For this lab we tested 6 halide salts found in the body, and their reactivity when a compound is added. We tested the halides NaF, NaCl, KBr, KI, and two unknown halides. To find the reaction of the halide, we are adding drops of Ca(NO3)2, AgNO3, AgNO3 + Na2S2O3, and NaOCI + Starch to the halides. Each halide will be separated from each other and the drops of each compound will be added to the halides, but it is one compound for one of the four halide rows, each compound will be in a different column.
Hypothesis:
If I mix drops of different compounds with halides found in
Variables:
Manipulated: Halide tested
Controlled: amount of Ca(NO3)2, AgNO3, AgNO3 + Na2S2O3, and NaOCI + Starch
Responding: reaction of halide

Procedures:
1.Gather and prepare all materials
2.Add 5 drops of NaF to each of the four wells of row A
3.Add 5 drops of NaCl to each of the four wells of row B
4.Add 5 drops of KBr to each of the four wells of row C
5.Add 5 drops of KI to each of the four wells of row D
6.Add 5 drops of Unknown Halide 1 to each of the four wells of row
11.Put 5 drops of 0.2 M NaI into each of the wells in Row D.
12.Reserve rows E and F for unknown solutions.
13.Add 5 drops of 0.5 M Ca(NO3)2 solution to each of the four halide solutions in Column 1. Record your observations in a data table.
14.Add 2 drops of 0.1 M AgNO3 solution to each of the halides in column 2 and 3. Record your data table colors of the precipitates formed.
15.Add 5 drops of 4 M NH3(aq) solution to the precipitates in column 2. Record your observations.
16.Add 5 drops of 0.2 M Na2S2O3 solution to the precipitates in column 3. Record your observations.
17.To the halides in column 4, add 5 drops of starch solution and 1 drop of 5% bleach solution. Record your observations. Save the results of testing the four halide solutions for comparison with tests of the unknown solutions.
18.Obtain an unknown solution containing a mixture of two halide ions.
19.Place 5 drops of the unknown mixture in each of the four wells in row F.
20.Add the reagents to each well as you did in Part 2.
21.Compare the results with those of the known halides in rows A-D.
22.Record your findings in the data table., and identify the unknowns in your