The combination of chemicals were: a) Nachos (sodium bicarbonate-baking soda) and HCI (hydrochloric acid) b. ) HCI and BIT (Brotherly blue) c. ) NH (ammonia, a base) and 1 drop of BIT d. ) HCI and blue dye e. ) Blue Dye and NAACP (sodium hypochlorite). The reaction was observed and then 1 drop of HCI was added f. ) SKI (potassium iodide) and (lead nitrate) g. ) Noah and phenolphthalein h. ) HCI and phenolphthalein I. ) Noah and Again (silver nitrate) j. ) Again and NH. This mixture was absorbed into a piece of paper towel and exposed to a light bulb. K. ) NH and Cuscus (Copper (II) sulfate)
For each mixture, reactions such as color, precipitation, and cloudiness were observed and recorded. After successful completion, the leftover chemicals were disposed by absorbing the left chemicals with paper towels. The well plates were washed with distilled water and dried with paper towels. The left over pipits were washed several times to discard any chemicals left. Lastly, hands were washed. Data and Observations Data TABLE 1: Reactions Expected Well #1 Question Chemicals Reaction AY Enhanced HCI – CO Clear, bubbles formed HCI and BIT Orange color, homogeneous
AY Unhand BIT = CO Dark blue (much lighter dark blue under white paper/ darker, opaque dark blue under dark paper) AY HCI and blue dye Green color, homogeneous AY Blue dye and NAACP Blue color, then 1 drop HCI added = blue-greenish color, more focused on green, homogeneous AY SKI and Yellowish, cloudy precipitate AY Noah and phenolphthalein Dark pink color, homogeneous AY HCI and phenolphthalein No bubbles, clear, homogeneous AY Noah and Again Light brownish, cloudy précis opiate AI Gangland NH Clear, some small bubbles at the bottom All Unhand Cuscus Light blue, cloudy precipitate
As the above TABLE shows, the reactions of different combination of chemicals were observed and recorded. The reactions were analyzed under white and black paper for backgrounds. Well AY showed a clear color with bubbles forming carbon dioxide. Well AY showed an orange color and well ABA formed a dark blue color. After previous mixtures, it seems that when BIT (Brotherly blue) is mixed with an acid, it turns into an orange color and when mixed with a base it forms a dark blue color.
Well AY formed a green color, where the white paper showed a lighter green and the black paper appeared with a darker green. The mixture in well AS showed a blue color. Then 1 drop of HCI added turned the mixture into a blue-greenish color, with a greater emphasis on green. Wells AY showed a yellowish, cloudy precipitate and AY formed a dark pink color. The color observed in well ABA was a clear homogeneous mixture. It appears that when phenolphthalein is mixed with an acid, the mixture remains clear and when mixed with a base, it forms pink.
Wells AY mixture formed a light, brownish precipitate and AI remained clear. Nevertheless, when mixture AI was absorbed into a piece of paper towel, the clear color hanged to a light brown spot after exposure to a light bulb for an hour. The last mixture AY 1 formed a light blue precipitate. Questions: A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the presence of sodium bicarbonate? I would test it with different chemicals in separate well-plates to see if there is a reaction the same way TABLE 1 shows.
A well may have HCI mixed with sodium bicarbonate and record whether the mixture forms any clear bubbles, any sign of strong odor. It could also be tested with phenolphthalein to see if a change occurs, forming a dark pink color or staying clear. B. You know what color phenolphthalein and brotherly blue turn when testing an acid or a base. Use the empty pipette in the Auxiliary Supplies Bag to test several (at least 3) household items including household cleaning products with brotherly blue. Rinse the pipette well before using it on the next household chemical.
When finished with this experiment rinse the pipette well and return it to the Auxiliary Bag for use in future experiments. Name he items tested and record their results. What do these results mean? 3 household items tested: Winded (original), Also, and 409 All-purpose Cleaner. Also mixed with BIT formed bubbles with an opaque green color. Winded mixed with BIT showed a dark blue color. Lastly, 409 All-purpose Cleaner mixed with BIT showed formed bubbles and a blue color. These results mean that Winded and 409 All-purpose Cleaner are bases and Also is an acid. C. You found a sample of a solution that has a faint odor resembling vinegar.
You are verifying that it is indeed vinegar and you add a few drops of honorTABLEness. The sample turns pink. What assumption can you make about this sample? Vinegar is an acid. Phenolphthalein only forms a pink color when it is mixed with a a base. This means that the sample of solution is not vinegar. D. You decided to investigate if the new wave of Vitamin Water is pH neutral: neither too acidic nor too basic. Using BIT (brotherly blue), you select five flavors of Vitamin Water to test. Three of the flavor-samples turn a murky green, indicating the likelihood of acid/base balance.
Of the two remaining, one turns slightly yellow, while one remains blue. What can you assume about the acid/base content of these particular flavors of Vitamin Water? When Biorhythms Blue is mixed with an acid it will turn orange-yellowish and when mixed with a base will form a blue color. Can assume that the Vitamin Water that remained blue is more towards a base than an acid. The Vitamin Water that turned yellow is more towards an acid than a base. E. You have read that a new brand of hair tonic is supposed to contain lead (an ingredient in Grecian Formula). Devise a simple test to confirm the presence or absence of lead in that hair tonic.
Lead nitrate mixed with potassium iodide Will form a yellowish color, a cloudy mixture. Would mix a small quantity of hair tonic with potassium iodide to see its reaction. If it turns into a yellowish color or maybe forms a precipitate or both, I would assume that lead is present in the hair tonic. If another color appears or remains clear, then, I would assume that there is no lead in the tonic. Conclusions Throughout this experiment, chemical changes were observed, where the color of each mixture was analyzed. The main objectives were careful seen in the properties of each mixture.
In the lab manual it mentions how we cannot see the individual atoms and molecules reacting but we are TABLE to observe color changes, precipitates and formation of bubbles. This experiment was successful in identifying bubbles formation and expected reactions when BIT reacts with an acid or a base and when phenolphthalein reacts with an acid or base, among other reactions. Based on previous combinations, it can be concluded that certain chemicals work better with acids and others with bases- This experiment showed possible reactions that we can use for further tidies in determining which mixtures are stronger as a base or as an acid.
This experiment was also TABLE to associate chemical properties with some of the most important household products used in everyday life. By analyzing chemical reactions, you can assume and determine the acid or base content of the chemical. This set of chemical tests satisfied the principle of finding the properties and main reactions between chemical combinations in order to have a better understanding on how these chemicals react with one another.
