Reactivity of Halides Lab

Topics: Periodic table, Halogen, Chemistry Pages: 4 (1369 words) Published: March 25, 2012
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 the body, then I believe that the halides will stay in a liquid state and will remain at a calm level, causing no explosions or fumes to be released. I believe this because though some halides can have dangerous reactions, they will not react dangerously unless a certain amount of a dangerous compound is added, and we have a controlled amount of compound being added to the halides. 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 E 7.Add 5 drops of Unknown Halide 2 to each of the four wells of row F 8.Put 5 drops of 0.1 M NaF into each of the four wells in row A. 9.Put 5 drops of 0.1 M NaCl in each of the wells in row B.

10.Put 5 drops of 0.2 M NaBr into each of the wells in row C. 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....
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