Labpaq Experiment 1

Name: |Date:|
Exp 1: Observations of Chemical Changes|Lab Section: |
Data Tables:
Part 1:
|Chemicals|Well No.|Observations of the Reaction|
A.|NaHCO3 + HCl|
H12|White and bubbled slightly and settled down to smaller smaller bubbles|
B.|HCl + BTB|
H11|Golden yellow; looked darker under the black paper|
C.|NH3 + BTB|H10
|Dark blue|
D.|HCl + blue dye|
H9|Greenish color|
E.|Blue dye + NaOCl|
H8|Blue and lighter than NH3+BTB solution color|
| with the 1 drop of HCl|
H8|Turned blue green in color|
F.|NaOCl + KI|
|See back page|
| with 1 drop of starch|
||
G.|KI + Pb(NO3)2|
H6|Bright yellow |
H.|NaOH + phenolphthalein|
H5|Violet red color; mixture rose slightly and sank back to its level|
I.|HCl + phenolphthalein|
H4|Turned cloudy and white in color|
J.|NaOH + AgNO3|
H3|Brown|
K.|AgNO3 + NH3|
|The solution on the paper towel did not change in color even after exposure to bright light for 3 minutes.|
|after exposure to bright light|
||
L.|NH3 and CuSO4|
|Overlooked this solution and was not able to do it|
Part F: Testing of Various Foods with the NaOCl + KI solution

Foods|Presence or Absence of Starch|

Wheat bread|Absence of starch|

Macaroni Cheese Pasta|Absence of starch|

Yellow corn kernel|Absence of starch|

Mixed brown/white rice|Absence of starch|

Rice cracker|Absence of starch|

Graham cracker|Absence of starch|

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Part 2:
Household Chemicals with Bromthymol Blue

Use the empty pipet in the Auxiliary Supplies Bag to test several (at least 3) household items including household cleaning products with bromothymol blue. Rinse the pipet well before using it on the next household chemical. When finished with this experiment rinse the pipet well and return it to the Auxiliary Bag for use in future experiments. Name the items tested and record their results.

Household Chemicals|Well No.|Observations of the Reaction|
Tide Detergent|G12
|Light greenish - neutral|
Glass Plus (generic Windex)|E12
|Blue –