Title: Observations of Chemical Changes
Purpose: To observe some properties of chemical reactions and associate them with everyday household cleaning products.
Procedure: In order to complete this experiment, I had to set up and organize my lab table. I used my 24-well plate, my 96-well plate, and the first experiment bag which included all of the necessary chemicals. I also had to gather 3 household cleaning products and a pipet in order to test them as well. The procedure involved was putting 2 drops of one chemical in the 96-well plate, and then adding 2 drops of a second chemical in the same well. I observed the reaction and recorded what change, if any, took place after looking at them against a white background and a black background. I then proceeded on to the next two chemicals, until all chemicals had been tested.
Data Table 1: Chemicals Provided in Lab Kit.
NaHCO3 and HCl-C02
Remained clear, very bubbly, almost as if forming a gas, which it was. Carbon Dioxide. B-1
HCl and BTB
The results of adding the blue indicator was a color change. It turned orange, indicating acidity. C-1
NH3 and BTB
It remained blue, indicating a base.
HCl and blue dye
The mixture turned green.
Blue dye and NaOCl
Blue at first, then when HCL was added to the mix, it turned green. F-1
Kl and Pb(NO3)2
Very yellow and dense looking.
NaOH and phenolphthalein
Reaction was a purplish/pink color H-1
HCl and phenolphthalein
Nothing happened, no reaction, remained colorless A-2
NaOH and AgNO3¬
Muddy brown in color, almost grit-like appearance B-2
AgNO3¬ and NH3
Nothing seemed to happen, no reaction, but when placed on a paper towel and exposed to sunlight, the paper turned rust colored, with some silvery areas. The paper towel was also extremely stiff. C-3
NH3 and CuSo4
Reaction was cloudy blue in color
Data Table 2: Household Cleaning Products
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