Observation of Chemical changes Essay

п»їObservations of Chemical Changes

Test 1

Biochemistry 111

Sept. 2010 3, 2014

Ashley Mattox

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 Toothpicks

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

you Well-Plate-24

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 – 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 PhenolphthaleinSolution1%1mL

1 Potassium Iodide, zero. 1 M-2 mL in Pipet

one particular Silver Nitrate, 0. 1 N – 2 cubic centimeters in light Dropper Jar

1 Salt Bicarbonate, one particular M – 2 mL in Pipet

1 Sodium Hydroxide, one particular M – 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 – Yellow and blue layer/ it isolates the acid as well as the base.

Palm Soap with Bromothymol Green – Turned yellow meaning it's a great acid.

Hydrogen with Bromothymol Blue – 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...


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