п»їObservations of Chemical Changes
Sept. 2010 3, 2014
Fuzy: The uses of this lab is to observe the reactions of some common chemicals found in consumer products and observe the macroscopic changes these types of chemicals undergo. Purpose: The purpose of the lab is to be able to translate underlying macroscopic changes in the behavior of atoms and molecules as well as learn how to independent mixtures to their component substances by solubility. Procedures/Materials Necessary:
1 Bed sheet of light and dark paper
you Paper towel
1 Unadulterated water
1 Small amounts of household cleaning products
one particular Goggle-safety
one particular Well-Plate-96
one particular Pipet, Bare Short Control
1 Aqueous Ammonia, 1M -1mL
1 Bromthymol Green, 0. 04% - two mL in Pipet
1 Copper (II) Sulfate, zero. 2 Meters вЂ“ a couple of mL in Pipet
one particular FDC Green Dye #-1. 0. 1% - a couple of mL in Pipet
you Hydrochloric Chemical p, 1 . 0M-1 mL
one particular Lead (II) Nitrate, zero. 2 M- 2 cubic centimeters in Pipet
1 Potassium Iodide, zero. 1 M-2 mL in Pipet
one particular Silver Nitrate, 0. 1 N вЂ“ 2 cubic centimeters in light Dropper Jar
1 Salt Bicarbonate, one particular M вЂ“ 2 mL in Pipet
1 Sodium Hydroxide, one particular M вЂ“ 1 cubic centimeters
1 Salt Hypochlorite, 1% - 2 mL in Pipet
you Starch Remedy, 1% Stabilized - a couple of mL in Pipet
1 . For the next combinations of chemicals and using a different well with the 96-well dish for each combo, place two pipet drops of the first in one very well and add a couple of drops from the second chemical. Next observe the mixtures up against the white and dark experience by sliding white and black paper underneath the well plate. For each reaction record the very well number of the mixture along with your observations. a. Sodium Bicarbonate and Hydrochloric Acid
n. Hydrochloric Acid and Bromothymol Blue
c. Ammonia and Bromothymol Green
d. Hydrochloric Acid and Blue Absorb dyes
e. Blue Dye and Sodium Hypochlorite
f. Potassium Iodide and Lead Nitrate
g. Salt Hydroxide and Phenolphthalein
l. Hydrochloric Chemical p and Phenolphthalein
i. Salt Hydroxide and Silver Nitrate
j. Silver precious metal Nitrate and Ammonia
k. Ammonia and Copper Sulfate
Data and Observations:
Data Table 1: Reactions
Very well #/
Sodium Bicarbonate and Hydrochloric Acid
Hydrochloric Acid and Bromothymol Green
Clear with Bubbles
Obvious with a shade of lemon
Ammonia and Bromothymol Green
Hydrochloric Chemical p and Green Dye
Crystal clear Blue
Emerald Green with a teal layer on top
Green Dye and Sodium Hypochlorite
Potassium Iodide and Lead Nitrate
Proceeded to go from dark blue, turned green in that case yellow.
Yellow-colored milky color/ Nitrate and Potassium
Sodium Hydroxide and Phenolphthalein
Hydrochloric Acid and Phenolphthalein
Sizzling pink color
My spouse and i
Sodium Hydroxide and Metallic Nitrate
Metallic Nitrate and Ammonia
Freezing mixture and Water piping Sulfate
Hint of pink when ever silver added looks like dark brown mud
Sediment part baby blue with dark layer at the top.
A. Assume a household item label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the existence of sodium bicarbonate?
You should mix it with HCI and see it intended for bubbles.
B. You know what color phenolphthalein and Bromothymol green turn once testing a great acid or maybe a base. Utilize empty pipet in the Additional Supplies Bag to test several household products including household cleaning items with Bromothymol. Name the items tested and record their results. So what do these effects mean?
Whiten with Bromothymol Blue вЂ“ Yellow and blue layer/ it isolates the acid as well as the base.
Palm Soap with Bromothymol Green вЂ“ Turned yellow meaning it's a great acid.
Hydrogen with Bromothymol Blue вЂ“ Dark blue which means it's a base.
C. You located a sample of any solution which has a faint odor of white vinegar. You will be verifying that may be indeed vinegar and you include a few drops of phenolphthalein. The...