Caffeine eine benze, and aspartame content of mountain dew soda was determined using reverse phase HPLC. The concentration of the standard used are as follows, caffeine: 0.70 mg/mL, benzoate: 1.6 mg/mL, and aspartame 5.0 mg/mL. The following volume of the standards were taken to a 50.0 mL volumetric flask and diluted to the calibration curve:
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- An EDTA solution was prepared by dissolving the disodium salt in 1 L of water. It was standardized using 0.5063 gram of primary standard calcium carbonate (MM: 100.08) and consumed 28.50 mL of the solution. The standard solution was used to determine the hardness of a 2 L sample of mineral water, which required 35.57 mL of EDTA solution. 1. What is the analyte in the analysis? Answer 2. What is concentration (M) of the EDTA solution used in the analysis? Answer 3. What is the concentration (ppm) of CaCO3 in the sample?Give typed answer not written You send a sample of rice to the lab for the determination of the total arsenic content. The analyst dissolves 525 mg of the rice in 5.0 mL of concentrated acid and then dilutes the solution to a final volume of 20.0 mL. When analyzed by ICP-MS, the solution concentration is found to be 20 µg L-1. What is the concentration of arsenic in the rice (in µg kg-1)?Figure 1:Experimental results Mass of empty weighing dish,g 2.2522g Mass of weighing dish + CaCl2 · 2H2O,g 6.2540g Mass of CaCl2 · 2H2O, g 4.0018g [Na₂CO₃], mol⋅L−1 0.3330 mol⋅L−1 Volume of the CaCl2 solution used, mL 10.00mL Volume of the Na₂CO₃ solution used, mL 10.00mL Mass of the filter paper + watch glass, g 51.3999g Mass of the filter paper + watch glass + dry product (final), g Weight 1=51.7235g Weight 2=51.7058g Figure 2:Calculated data Mass of dry product, g 0.3059g Moles of CaCl2 used, mol 0.02721mol Moles of Na₂CO₃ used, mol 0.02721mol [CaCl2], mol⋅L−1 0.3330 mol⋅L−1 Limiting reagent Calculated mass of excess reagent remaining in the mixture after reaction, g Theoretical yield, g % yield I need help in my lab. The number of mols of cacl2 and na2co3 gives me the same number. If I need to calculate the limiting reagent, how would I be able to do that if they have…
- How much calcium would you ingest by drinking one 8 oz glass of your tap water? Show all calculations. Tap Water Trial 1 Tap Water Trial 2 Tap Water Trial 3 Initial Syringe Reading 1.0ml 1.0ml 1.0ml Final Syringe Reading 0.65ml 0.68ml 0.67ml Volume of EDTA Consumed 0.35ml 0.32ml 0.33ml Water Hardness ppm CaCO3 70.07 ppmCaCO3 64.064 ppmCaCO3 66.066 ppmCaCO3 Average ppm 66.73 ppmCaCO3Sample AnalysisSource of Water sample:Tap Water Molarity of Na2S2O3 1 2 3 0.0243 0.0245 0.0228 Average Molarity of Na2S2O3 0.0239 Trials 1 2 3 Volume of sample used 100.00 100.00 100.00 Final Volume Reading Na2S2O3 (ml) 6.70 10.00 13.10 Initial Volume Reading Na2S2O3 (ml) 3.40 6.70 10.00 Net VolumeNa2S2O3 used (ml) 3.30 3.30 3.10 mg O2 in sample ppm O2 in sample average ppm O2 in sampleA 50.00 (±0.03) mL portion of an HCl solution required 29.71(±0.03) mL of 0.01963(±0.0030) M Ba(OH)2 to reach an end point with bromocresol green indicator. The molar concentration of the HCl is calculated using the equation below (attached image): a.) Calculate the uncertainty of the result (absolute error). M=0.02333(±?????) M b.) Calculate the coefficient of variation for the result. CV= (Sy/y) x 100%
- EXPERIMENT: DETERMINATION OF THE AMOUNT OF POTASSIUM HYDROXIDE IN THE GIVEN SOLUTION Aim: To determine the amount of Potassium Hydroxide in the given solution. Materials: 0.1N, 100 ml Sodium carbonate solution Sodium carbonate (Na2CO3), hydrochloric acid (HCl), Potassium hydroxide(KOH), phenolphthalein indicator, methyl orange indicator, pipette, burette, conical flask, Measure cylinder (10 ml ), Volumetric flask(100) ml), Weighting machine balance. Theoretical Background: …………………… Observations: Standardization of HCl Sl. No Volume of sodium carbonate (V1) Initial burette reading Final burette reading Volume of HCl used 1 10 0.0 9.9 9.9 2 10 9.9 19.9 10.0 3 10 19.9 29.9 10.0 Concordant value (V2) = 10 ml Estimation of KOH Sl. No Volume of KOH (V4) Initial burette reading Final burette reading Volume of HCl used 1 10 0.0 8.1 8.1 2 10 8.1 16.1 8 3 10 16.1 24.1 8…Table of caffeine standards concentration . Sample Conc, ppm Std1 16 Std2 32 Std3 48 Std4 64 Std5 80 If the volume used to make 100 mL of std 1 is 2 uL what is the concentration in M used to make std calibration curve ? The standards are going to be used to build calibration curve to analyze caffeine in an energy drink. if 500 mL of the energy drink has target of 400 mg , how will you prepare the sample if you need 10 mL for the analysis ? Caffeine MM=194.19 g/mol.Test Data: Part 1: Preparation of the Primary Citric Acid Standard Mass of empty 250-mL glass beaker: 100.7g Mass of 250-mL beaker and anhydrous citric acid First weighing : 103.4 g Second weighing: 106.1 g Third weighing 3. Total volume of citric acid solution: 75.0 mL help me with this part Part 1: Preparation of the Primary Citric Acid Standard Mass of Citric Acid _________________________ Volume of Citric Acid Solution ____________ Moles of Citric Acid _________________ (Molar Mass = 192.0 g/mol) Molarity of Citric Acid Solution ____________
- Experiment 3: Wet granulation Rx Calcium carbonate 135 mg Sig. Prepare 5 tabletsMagnesium carbonate 100 mgSodium chloride 50 mg10% Starch paste qsMagnesium stearate 1%Dried cornstarch 1%* The prescription is to be prepared as follows: 1. Prepare the 10% starch paste by making a slurry with a small amount of water. To this slurry, add boiling water to the final volume and stir until a translucent gel has formed.2. In a mortar, blend the calcium carbonate, magnesium carbonate and sodium chloride. Gradually with kneading and mixing, add the starch paste until a mass is formed that willball and stick together when squeezed, but will not be sticky and gummy.3. Pass this mass through sieve # 40 and collect on a paper-lined tray. Dry the granulation in the oven set at 55 degrees Celsius then pass through sieve #40 again then weigh.4. Calculate the weight of lubricant to be added (mixture equal amounts of dried cornstarch and magnesium stearate) then blend.5. Package in a tight container and…Experiment 3: Wet granulation Rx Calcium carbonate 135 mg Sig. Prepare 5 tabletsMagnesium carbonate 100 mgSodium chloride 50 mg10% Starch paste qsMagnesium stearate 1%Dried cornstarch 1%* The prescription is to be prepared as follows: 1. Prepare the 10% starch paste by making a slurry with a small amount of water. To this slurry, add boiling water to the final volume and stir until a translucent gel has formed.2. In a mortar, blend the calcium carbonate, magnesium carbonate and sodium chloride. Gradually with kneading and mixing, add the starch paste until a mass is formed that willball and stick together when squeezed, but will not be sticky and gummy.3. Pass this mass through sieve # 40 and collect on a paper-lined tray. Dry the granulation in the oven set at 55 degrees Celsius then pass through sieve #40 again then weigh.4. Calculate the weight of lubricant to be added (mixture equal amounts of dried cornstarch and magnesium stearate) then blend.5. Package in a tight container and…Experiment 3: Wet granulation Rx Calcium carbonate 135 mg Sig. Prepare 5 tabletsMagnesium carbonate 100 mgSodium chloride 50 mg10% Starch paste qsMagnesium stearate 1%Dried cornstarch 1%* The prescription is to be prepared as follows: 1. Prepare the 10% starch paste by making a slurry with a small amount of water. To this slurry, add boiling water to the final volume and stir until a translucent gel has formed.2. In a mortar, blend the calcium carbonate, magnesium carbonate and sodium chloride. Gradually with kneading and mixing, add the starch paste until a mass is formed that willball and stick together when squeezed, but will not be sticky and gummy.3. Pass this mass through sieve # 40 and collect on a paper-lined tray. Dry the granulation in the oven set at 55 degrees Celsius then pass through sieve #40 again then weigh.4. Calculate the weight of lubricant to be added (mixture equal amounts of dried cornstarch and magnesium stearate) then blend.5. Package in a tight container and…