Observations of Chemical Improvements Labpaq

 Observations of Chemical Improvements Labpaq Composition

Observations of Chemical Adjustments

Purpose/Hypothesis: To see how acids react with bases and examine reactions of prevalent household cleansers and the macroscopic changes these kinds of chemicals go through. I expect for each answer to react in a different way when combined with acids and bases. Process:

I have a well-plate-96, an item of white and black paper, and the chemicals from the Observation of Substance Changes Research Bag. We used a unique well for every combination of solutions. I put two drops of one chemical then two drops of the different chemical. Observation:

NaHCO3 and HCl - Crystal clear bubbles; pockets did not fizz.

HCl and BTB- Color changes to fruit after the BTB is added. NH3 and 1 drop of BTB- Turned dark blue.

HCl and Green Dye - Turned darker blue

Blue Dye and NaOCl- Switched dark green then laurel blue.

NaOCl and KI- Turned yellow-colored.

KI and Pb(NO3)2- Cloudy yellow.

NaOH and phenolphthalein- Dark green.

HCl and phenolphthalein- Obvious w/ No bubbles.

NaOH and AgNO3 – Olive green.

AgNO3 and NH3- Obvious w/ Bubbles

NH3 and CuSO4- Cloudy aqua blue.

Questions:

A. Suppose a household product labeled says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material intended for the presence of sodium bicarbonate? *I would test it with HCl to see if this begins to bubble.

B. You know what color phenolphthalein and Bromthymol blue change when tests an acidity or a foundation. Use the empty pipet inside the Auxiliary Supplies Bag to test several (at least 3) household products including home cleaning items with Bromthymol blue. Rinse your pipet some time before using it for the next home chemical. When ever finished with this kind of experiment rinse the pipet well and returning it towards the Auxiliary Carrier for use in future experiments. Brand the items analyzed and record their effects. What do these results suggest? *When combined with Windex the perfect solution remains blue. When blended w/ Grease Lightening the solution remained green. When mixed with Quick Stand out Floor Surface finish Solution...

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