Observing and Deciphering Chemical Changes
Observing and deciphering Chemical Changes
Purpose
The purpose of this experiment is to observe reactions of chemicals that can be found in consumer products. Through observation, students should be able to interpret the chemical reactions and determine some characteristics, such as pH and solubility. Method
1. Pipets containing chemicals will be opened using scissors to snip the end and each pipet will be placed in a well of a 24-well plate. The scissors must be washed between each pipet. 2. A 96-well plate will be placed onto a white sheet of paper. 3. Each set of chemicals will be mixed by dropping two drops of the first chemical and then two drops of the second chemical into a well of the 96-well plate. 4. Each chemical reaction will be observed and the reactions will be recorded. 5. Three household cleaners will be diluted.
6. Two drops of each cleaner will be tested in the 96-well plate with 2 drops of bromothymol blue. Procedure and Data
1. Each pipet was opened by snipping the end off with scissors and then placed in the 24-well plate. The scissors were washed each pipet. 2. The 96-well plate was placed onto a white sheet of paper. 3. Each set of chemicals was mixed as follows and the observations of the reactions were recorded in Data Table 1.
A1) Two drops of NaHCO3 and two drops of HCl.
B1) Two drops of HCl and two drops of BTB.
C1) Two drops of NH4OH and one drop of BTB.
D1) Two drops of HCl and two drops of blue dye.
A2) Two drops of blue dye and two drops of NaOCl. One drop of HCl was then added. F) Two drops of KI and two drops of Pb(NO3)2.
G) Two drops of NaOH and two drops of phenolphthalein.
H) Two drops of HCI and two drops of phenolphthalein.
B2) Two drops of NaOH and two drops of AgNO3.
C2) Two drops of AgNO3 and two drops of NH4OH. This mixture was then absorbed into the corner of a paper towel and held in direct sunlight for approximately 5 minutes. D2) Two drops of NH4OH and two drops of CuSO4.
4. Each of the three
Purpose
The purpose of this experiment is to observe reactions of chemicals that can be found in consumer products. Through observation, students should be able to interpret the chemical reactions and determine some characteristics, such as pH and solubility. Method
1. Pipets containing chemicals will be opened using scissors to snip the end and each pipet will be placed in a well of a 24-well plate. The scissors must be washed between each pipet. 2. A 96-well plate will be placed onto a white sheet of paper. 3. Each set of chemicals will be mixed by dropping two drops of the first chemical and then two drops of the second chemical into a well of the 96-well plate. 4. Each chemical reaction will be observed and the reactions will be recorded. 5. Three household cleaners will be diluted.
6. Two drops of each cleaner will be tested in the 96-well plate with 2 drops of bromothymol blue. Procedure and Data
1. Each pipet was opened by snipping the end off with scissors and then placed in the 24-well plate. The scissors were washed each pipet. 2. The 96-well plate was placed onto a white sheet of paper. 3. Each set of chemicals was mixed as follows and the observations of the reactions were recorded in Data Table 1.
A1) Two drops of NaHCO3 and two drops of HCl.
B1) Two drops of HCl and two drops of BTB.
C1) Two drops of NH4OH and one drop of BTB.
D1) Two drops of HCl and two drops of blue dye.
A2) Two drops of blue dye and two drops of NaOCl. One drop of HCl was then added. F) Two drops of KI and two drops of Pb(NO3)2.
G) Two drops of NaOH and two drops of phenolphthalein.
H) Two drops of HCI and two drops of phenolphthalein.
B2) Two drops of NaOH and two drops of AgNO3.
C2) Two drops of AgNO3 and two drops of NH4OH. This mixture was then absorbed into the corner of a paper towel and held in direct sunlight for approximately 5 minutes. D2) Two drops of NH4OH and two drops of CuSO4.
4. Each of the three