Chemical Thinking P6 Proposal Grading Rubric | 1 Project 6 Research Proposal Gra

Question

Chemical Thinking P6 Proposal Grading Rubric | 1 Project 6 Research Proposal Grading Rubric Pigment (12 points total) P1 .0) Gives a balanced chemical equation for the pigment synthesis P2 (2.0) Reaction involves TWO different reactants from the Inorganic Pigment Materials list P3 1.0) Reaction has a reasonable chance of working. P (1.0) Procedure for the pigment synthesis present-can be an outline. PS 2.0) Procedure for the pigment synthesis gives masses (g) and volume (mL) of reagents and solvent (water). The specified amounts must be reasonable to the synthesis scale. Procedure for the pigment synthesis is sufficiently detailed so that someone with basic lab skills can successfully perform the preparation. PG 43.0) P7 .0) Complete list of chemicals needed to synthesize the pigment. P8 0) Complete list of equipment needed to prepare the pigment. Proposed Paint Formulations-Study Design Part 1 (20 points total) 3.0) Property or properties under study dearystated. variables constant) household item such as egg, glue, varnish, etc.) specified ist) and any additives (if part of the proposed studyl are specified solvent or solvent combination has a reasonable chance of dissolving the inorganic pigment. formulations so that trends can be revealed and predications made. F1 F2 (3.0) Proposed studies vary only ONE variable at a time (has a reasonable chance of holding all other F3 43.0) Formulation preparation; amount and type of vehicle(from Oils and Polymers list, or if a F4 (3.0) Formulation preparation; amount and tvee of solvent (from Solvent and Low-Volatility Solvents FS (2.0) Formulation preparation; vehicie and solvent are compatible (vehicle will dissolve in solvent) and F6 4.0) Proposed studies are on the milli-scale level, with MANY smail-scale "proof of concept F7 1.0) Complete list of chemicals needed to prepare the formulations. F8 1.0) Complete list of equipment needed to prepare the formulations Proposed Paint Formulation Tests-Study Design Part 2 (18 points total) TL (2.0 All proposed testing dlearly stated T2 1.0) Procedure for the proposed testing present-can be an outline. T3 4.0) Procedure for the proposed testing is sufficiently detailed so that someone with basic lab skils can successfully perform the tests) to permit the discovery of trends that have predictive power. reproducible) manner 4 4.0) Testing design is quantitative, or if qualitative, a means of scoring, scaling, or ranking is specified TS 2.0) Test designs are solid-there is a good chance of producing the desired data in a controlled T6 (2.0 Test designs are on a milli-scale level. 7(1.0) Test designs are time efficient and cost-offective. T8 1.0) Complete list of supplies needed to perform the testís). T9 L.0) Complete list of equipment needed to perform the test(s) Grand Total 50 points PE PYR. .2527-15 M

Explanation / Answer

SYNTHESIS OF PRUSSIAN BLUE:

4FeCl36H2O + 3K4(Fe(CN)6)3H2O = Fe4(Fe(CN)6)3.14H2O +12 KCl

Chemicals Required:

        Ferric Chloride

        Potassium Ferrocyanide

Procedure:

    Weigh accurately about 1.480 g of FeCl3 (ferric chloride) in a small beaker labeled Prussian blue and mix with 5 mL of distilled water. Mix the solution until it is all dissolved. Weigh accurately 0.556 g of potassium ferrocyanide, K4[Fe(CN)6] into a small beaker and mix with 5 mL of distilled water . Stir until dissolved. Slowly pour the solution of potassium ferrocyanide into the beaker labeled Prussian Blue and stir the mixture. Let the reaction continue and record the results you see. Weigh accurately a small filter paper and place in the filtration apparatus. Filter the precipitate of Prussian blue that forms using the house vacuum. Allow the pigment to dry uncovered on the filter paper until the next lab period in your lab drawer on top of a paper towel. Weigh the dried pigment and filter and subtract the initial weight of the filter paper to obtain the weight of the pigment.

SYNTHESIS OF CHROME YELLOW:

Na2CrO4 + ZnSO4 = ZnCrO4 + Na2SO4

ZnCrO4 + 2NaOH = Zn(OH)2 + Na2CrO4

Chemicals Required:

        Sodium chromate

        Zinc Sulfate

        6M NaOH

Procedure:

    Weigh approximately 0.20 g of sodium chromate (Na2CrO4) in a beaker and mix with 2 mL of distilled water.   Stir the solution until completely dissolved. Weigh approximately 0.90 g of zinc sulfate (ZnSO4) in a small beaker and mix with 2 mL of distilled water and stir. Pour the solution of zinc sulfate into the solution and mix thoroughly. Add about 0.5 mL of 6M NaOH to make the solution basic. Stir well. The color will change from yellow-orange to bright yellow. Weigh a small filter and place in the filtration apparatus. Filter the precipitate of zinc chromate (ZnCrO4), which forms if necessary. Allow the pigment to dry uncovered on the filter paper until the next lab period in your lab drawer on top of a paper towel. Weigh the dried pigment and filter and subtract the weight of the filter paper to obtain the weight of the pigment.

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