Prepare the following solutions 1. 250.0 mL 0.0100 M working EDTA solution from 0.1000 M EDTA 2. 50.0 mL 0.0050 M working standard Ca2+ solution from 0.0500 M Ca2+ 3. 25.0 mL 4.0 M MnSO4 from MnSO4·2H2O crystals
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Prepare the following solutions
1. 250.0 mL 0.0100 M working EDTA solution from 0.1000 M EDTA
2. 50.0 mL 0.0050 M working standard Ca2+ solution from 0.0500 M Ca2+
3. 25.0 mL 4.0 M MnSO4 from MnSO4·2H2O crystals
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- A 5% dextrose in 1/2 normal saline (D5 1/2 NS) solution is commonly administered to patients needing post-operative IV fluids. How could you prepare 500 mL of this solution? Dextrose is 5% (m/v) and the NaCl is 0.45% (m/v).Solution Absorbance mg/ml aspirin Standard solution - 1.6 mg/mL A 0.638 0.08 mg/mL B 0.504 0.064 mg/mL C 0.376 0.048 mg/mL D 0.259 0.032 mg/mL E 0.126 0.016 mg/mL A = -log T where T = %T ÷ 100 Construct a callibration curve using the above data. Absorbance should be on the vertical axis and "mg/mL of acetylsalicylic acid" on the horizontal axis. The line should go through the origin. Using the data provided, the graph you have generated, and the procedure that was used to generate the solutions which were examined by spectroscopy, calculate the amount of acetylsalicylic acid per tablet. Commercial tablet 1 labelled as 100 mg enteric coated Absorbance = 0.16 Commercial tablet 2 labelled as 300 mg Absorbance = 0.45 Student prepared tablet from practical 5 Absorbance = 0.19 Using the data provided, the graph you have generated, and the procedure that was used…You just made a 1.5M permanganate solution. What concentration is your potassium permanganate solution in percent? "K: 39.10 g/mole" "Mn: 54.94 g/mole" "O: 16 g/mole" "MW of KMnO4 is 158.04 g/mole" O a. 0.24% Ob. 20.1% O c. 15.8% O d. 23.7% O e. 2%
- 8. What mass of solute is needed to prepare each of 1.00 L of 0.125 M K2SO4 solutions? (2 Points) 21.8 g K2SO4 218.0 g K2SO4 2.816 g K2SO4 28.16 g K2SO4Prepare 1.5L 2X Base stock in a media bottle: Fill out the last column of this table: Component MgCl.6H20 (NH4)2SO4 H3PO4 (85%) КСІ EDTA 1X concentration 0.52 g/L 12 g/L 1.6 mL/L 0.12 g/L 0.1 g/L 2X (Provide unit)The Ksp values of silver chromate Ag2CrO4 and silver iodate Ag(IO3) are given below. Ag2CrO4 Ag(IO3) Ksp 1.12 x 10-12 3.17 x 10-8 Based on these Ksp values, which of the following is true? Choose one option only. Options: a. In the solution consisting of 1.00 x10-4 M Ag+ and 5.00 x10-5 M CrO42-, Ag2CrO4 precipitate will form. b. In the solution consisting of 1.0 x10-4 M Ag+ and 1.0 x10-4 M IO3-, Ag(IO3) precipitate will form. c. In pure water, the solubility of Ag2CrO4 is lower than the solubility of Ag(IO3). d. In the solution consisting of 0.200 M CrO42- and 0.200 M IO3-, Ag2(CrO4) will precipitate first if we add Ag+ ions gradually into the above mixture.
- Calculate the volume of BSA stock that will be required to make the standard solutions needed to create the BSA standard curve. Be sure to show your work and include the volume of 0.02 M phosphate buffer required to reach a final volume of 1 mL. From a 2,000 μg/mL BSA stock, create 1 mL of each of the following stock solutions in 0.02 M phosphate buffer using individual microcentrifuge tubes: 50 μg/mL, 250 μg/mL, 500 μg/mL, 1,000 μg/mL, 1,250 μg/mL, 1,500 μg/mL. Be sure to properly label all the microcentrifuge tubes before creating the standards.DATA Determine the Molar concentration of your dilutions using the formula M₁V₁ = M₂V₂. The initial molarity is 0.0001M (1x10-4M). M1 V1 1.56E-06 500uL Concentrations Tube 1 1.56E-06 Tube 2 Absorbance Tube 1 Tube 2 M2 Tube 3 Tube 3 V2 1000uL Tube 4 Tube 4 Tube 5 Tube 5 Tube 6 Tube 7 Tube 6 Tube 7 Tube 8 Tube 8 Tube 9 Tube 9 Tube 10 Tube 11 Tube 10 Tube 11 10Solution Initial Mass (g) Final Mass (g) Change in Mass (g) % Sucrose Red 1.88 1.79 -0.09 Orange 1.92 0.95 -0.97 Yellow 1.95 2.40 +0.45 Green 2.00 1.35 -0.65 Blue 1.89 2.90 +1.01 Purple 1.90 2.05 +0.15 First: Calculate the change in mass for each apple block in grams (g) and write it in the chart. Include a “+” or “–” sign to signify a gain or loss in mass. Second: According to Jasmine’s lab directions, she should have created the following sucrose solutions: 0%, 5%, 10%, 15%, 20% and 25%. Using the changes in mass, determine which color solution has which percent sucrose and fill in the answers in the chart.
- You are presented with the following prescription: Rx Drug Y 175 mg Witepsol H15 q.s. Supply 6 suppositories (using 3 g nominal moulds) When using Witepsol H15, moulds will hold 1.06 times their nominal weight. The displacement value of Drug Y in Witepsol H15 is 1.1. Calculate the mass of Witepsol H15 required to prepare this product. Give your answer to two decimal places.Available cloxacillin 2g match the following reconstitution option with the order ordered: 1500 mg of cloxacillin IV q8h ordered: 800 mg of cloaxacillin IM q6h ordered: 500 mg of cloxacillin IM q8h ordered: 1800 mg of cloxacillin IV q8h 1. 2. add 4.8 mL sterile water for concentration of 400mg/mL add 9.8 mL of sterile water for concentration of 200 mg/mL1. Similarities between Colloidal and Crystalline Precipitate 2. Calculate the 96 Ag(m/m) given the following: a. Ore sample containing Ag= 2.0770 g b. After precipitating using BaCl2, the mass of AgCl obtained = 0.7150 g