You know what color phenolphthalein and bromothymol blue turn when testing an acid or a base. Use the empty pipet in the Auxiliary Supplies Bag to test several (at least 3) household items including household cleaning products with bromothymol blue. Rinse the pipet well before using it on the next household chemical. When finished with this experiment rinse the pipet well and return it to the Auxiliary Bag for use in future experiments. Name the items tested and record their results.
96-well plate is used for mixing the chemicals. For each combination, a different well is used. For each combination, 2 drops of the 1st chemical are placed in the well followed by 2 drops of the 2nd chemical. After placing 2 drops of the 2nd chemical, observation is immediately made for any change of color, forming of precipitates or bubles. Also white & dark backgrounds are alternatively placed underneath the well plate for observing the mixture.
Part II: Colorimetry of FD & C Blue # 1 Dye (Brilliant Blue FCF) Discussion and Review: In this part of the experiment, we will use a color standard calibration system to determine the concentration of an unknown solution. FD&C dyes refer to specific commercial dyes approved for human consumption under the US government’s Food, Drugs, and Cosmetics Act. We will start with FD&C Blue #1, a commercial food dye of known concentration. Through serial dilutions we will end up with a color “standard”, a set of diluted
Mix pairs of solutions in the following ways, and record all of your observations in the data table. System 5: FeCL3 + KSCN System 6: Fe CL3 + AgNO3 System 7: FeCL3 + K4Fe(CN)6 Part B: Reactions of Acids To four of your calibrated test tubes, add 3-ml of hydrochloric acid, and to four different test tubes add 3-ml of HNO3.…Test the reaction of the acids to litmus paper by dipping a glass rod into the test tube containing the acid you are testing and touching it gently to both the blue and red litmus paper. Record observations in the data table. Make sure you rinse off the
Chemistry Lab – Precipitate Patterns Purpose: To identify which anion will be used to form a precipitate with the most metal cations. Procedure: All materials were obtained A chart was made to compare anions and cations Drops of sodium carbonate solution were placed in each section of the wet plate Dilute solutions of calcium carbonate were dropped into the sodium carbonate and observations were recorded Step 4 was repeated for all other reacting solutions and observations were recorded Chemicals were placed into a waste beaker and disposed of Lab station was cleaned Observation List: Na2CO3 + Ca(NO3)2 CaCO3 + NaNO3 -Formation of a precipitate Na2CO3 + Cu(NO3)2 CuCO3 + NaNO3 -Formation of a precipitate Na2CO3 + Fe(NO3)2 FeCO3 + NaNO3 -Formation of a precipitate Na2CO3 + Mg(NO3)2 MgCO3 + NaNO3 -Formation of a precipitate Na2CO3 + Zn(NO3)2 ZnCO3 + NaNO3 -Formation of a precipitate Na2CO3 + NaSO4 Na2CO3 + Na2SO4 -Formation of a precipitate Na2SO4 +Cu(NO3)2 CuSO4 + NaNO3 -Formation of a precipitate Na2SO4 + Ca(NO3)2 CaSO4 + NaNO3 -Formation of a precipitate Analyse and Evaluate: The investigation could have been improved of beakers were used instead of wet plates. This way, it would have been easier to see the reactions taking place. The anion that could be used to precipitate the most metals cations was carbonate. Carbonate could be used to remove silver ions.
Purpose The purpose of the lab was to recognize chemical changes, what they may indicate, and to understand household product chemical properties. The use of common chemicals allows for a better understanding of the properties that are used in every day life and how they affect each other. Seeing the reaction at a macroscopic level allows questions for the microscopic level and further experimentation. Procedure The experiment was started by gathering the proper equipment and supplies listed in the lab manual, while reading through the entire lab experience. The supplies included: a pencil, a printout of the table of reactions, a toothpick, a sheet of white paper, a sheet of black paper, a paper towel, distilled water, a small amount of household cleaners (such as: Windex, vinegar, and stainless steel/granite cleaner), the goggles from LabPaq, 24-well plate, 96-well plate, a empty short stem pipet, and the bag labeled for the experiment from LabPaq that included: aqueous ammonia, bromethylmol blue, Copper (II) Sulfate, FDC blue dye #1, hydrochloric acid, lead (II) nitrate, phenolphthalein solution, potassium iodide, silver nitrate, sodium bicarbonate, sodium hydroxide, sodium hypochlorite, and starch solution 1% stabilized.
Purpose The Purpose of this lab is to observe and discover how different chemicals and substances react with each other and how their physical and chemical properties change. Procedure Before beginning the experiment, I reviewed the instructions and the goals of the experiment and re -reviewed the safety procedures when conducting lab experiments After I prepared myself with the requirements, I laid out each item that was needed to perform the experiment- test tubes, bunsen burner, 100-Ml Glass Beaker, Stirring Rod, test tube clamp holder, cleaning brushes, 24 well plate, 96/well plate, blue litmus paper, red litmus paper, Copper (II) Carbonate, Copper (II) Nitrate Crystals, Copper Metal, Magnesium, Magnesium Oxide Powder, Sodium
|Cloudy mixture |Bubbled/ fizz had |Red- green |Gas noted |Turned blue became | | | | | |darker on bottom |leftover Mg in |center |Fizzled |clear liquid. | | | | | |Powder settled. |tube? |Changed blue |Cloudy Green | | | | | | | | | |Substance | | | | | | | | |Blue green | |
Then, 3 drops of 3 M HCl was added to each of the solutions and the color of each was recorded. Then, the spot plate’s contents were put into the waste beaker and the plate was cleaned. After that, 1 drop of each of the five transition metal cations was added to separate holes in the spot plate, 3 drops of 3 M NH4OH was added to each hole and the color of each was recorded. Then the spot plate was cleaned again and 1 drop of each of the five transition metal cations was added to the separate holes. After that, 1 drops of dimethylglyoxime (DMG) was added to each and the color of each was recorded.
Duplicating a Color with Dye Trohimczyk, Brianna; Delgado, Theon Purpose: The purpose of this experiment is to match the color of the control dye with the new color of the dye produced in the test tube. Hypothesis: When two drops of red dye are placed with one drop of yellow dye in a test tube of water, the result will match the color of the controlled dye. Materials: * Four colors of food coloring (red, green, blue, yellow) * Test tubes * Pipets Procedure: 1. Place water into a plastic cup 2. Use the pipet to place 10ml of water into an empty test tube 3.