INSTRUCTIONS: Answer the following questions, and solve the tollowing problems to evaluate your progress in laboratory mathematics proficiency. Please assume that water has a m.w. of exactly 18.000. 1. You need to prepare 100 ml of a 5.000% (w/v) glucose solution, using anhydrous glucose (m.w. 180.000) which has an assay value of 97.6%. How many grams of the glucose do you need? You need to make 1 liter of a 2.000 M solution of glucose, using anhydrous glucose which has an assay value of 93.6%. How many grams of the glucose must you weigh out? (m.w. glucose is 180.000) 2. You need to make 100 mL of a 10% FeCla using FeCla-6H20, which has a m.w. of 270.300, and an assay value of 98.9%. Anhydrous FeCa has a m.w. of 162.300. How many grams of the FeClg.6H2O must you weigh out? 3.

INSTRUCTIONS: Answer the following questions, and solve the tollowing problems to evaluate your progress in laboratory mathematics proficiency. Please assume that water has a m.w. of exactly 18.000. 1. You need to prepare 100 ml of a 5.000% (w/v) glucose solution, using anhydrous glucose (m.w. 180.000) which has an assay value of 97.6%. How many grams of the glucose do you need? You need to make 1 liter of a 2.000 M solution of glucose, using anhydrous glucose which has an assay value of 93.6%. How many grams of the glucose must you weigh out? (m.w. glucose is 180.000) 2. You need to make 100 mL of a 10% FeCla using FeCla-6H20, which has a m.w. of 270.300, and an assay value of 98.9%. Anhydrous FeCa has a m.w. of 162.300. How many grams of the FeClg.6H2O must you weigh out? 3.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Calcium carbonate =135mg Magnesiumcarbonate=100mg Sodium chloride=50mg 10% starch paste qs Magnesium stearate =1% Dried cornstarch=1% Question 1: enlarge the formulation to make 5 tablets.show solution. Question 2:if the total weight of dried granules was 1400mg,compute for the weight of Magnesium stearate and dried cornstarch that is to be added. Show complete solution.
ATES OF MATTER Solving applied mass concentration problems GenAlex Medical, a leading manufacturer of medical laboratory equipment, is designing a new automated system that can detect normal levels of dissolved triiodothyronine (230. to 660. pg/dL), using a blood sample that is as small as 150 µL. Calculate the minimum mass in picograms of triiodothyronine that the new system must be able to detect. Be sure your answer has the correct number of significant digits. Pg X 3/5 S
What volume (in mL) of 30.0% hydrogen peroxide solution is required to provide the mass required in question 8 above? Mass=10.2g of a 30% hydrogen peroxide soltuion. Density of 30.0% H2O2 = 1.11 g/mL Answer with 3 sig figs.
An impure sample contains 1.01 g of impurities and 4.92 g of benzoic acid. The impure sample is dissolved in water, then heated. The solution is then cooled. How many grams of benzoic acid will recrystallize when the solution has cooled? Include the unit and two decimal places in your answer. The solubilities of the impurity and benzoic acid in hot water are found as an item in the Recrystallization Experiment folder. Solubility Data for Report Questions 10 Compound Cold Water solubility Hot Water Solubility Benzoic acid 0.42 g per 100 mL of water 5.79 g per 100 mL of water Impurity 0.61 g per 100 mL of water 4.62 g per 100 mL of water
Please help I'm not sure how to solve these. A solution is prepared by dissolving 20g of NaCl (f.w.= 58.44 g mol^-1), a nonvolatile solute, in enough water (m.w. = 18.02 g mol^-1) to result in exactly 1 L of solution at 25 C. The density of the solution is 1 g mL ^-1. How do you calculate freezing point of the solution as well as vapor pressure and the osmotic pressure? I understand boiling point.
I need to make a solution containing 0.025 grams per liter. However, I do not want to weigh 0.025 grams and put this in one liter of solvent. I want to make a stock solution of 0.25 grams in 500 ml of solvent and take a unknown aliquot and dilute this in 500ml of solvent instead of 1000 ml of solvent. How do I calculate the volume of aliquot from the stock solution to achieve a final concentation of 0.025 grams per liter? What is the proper equation(s) required to figure out the proper aliquots required?
2. 1.02 mL of methanol (CH3OH) was added into a 75.0 mL volumetric flask and mixed with water until the final volume was reached. What is the molarity of the solution? The density of methanol is 0.790 g/mL. Show your work.
Calculate the volume of stock glucose solutions (2.5 % and 15%) that need to be used to prepare 800 mL of glucose solution with a concentration of 13%. In this case % refers to the grams of glucose per 100 mL of water. V1= volume of stock solution with concentration C (2.5%) V2= volume of stock solution with concentration C2 (15 %) You need to determine V, and V2 in mL
A 0.100 M solution of an unknown acid, HA, is 3.95% ionized. Complete the following table, but instead of using the variable x, calculate the number values of each quantity and report these values to the correct number of significant figures. Fill in all of the cells. Include signs in the Change column to indicate a gain or loss of concentration. Do not include any units in your answers, M is assumed. To enter values in scientific notation follow the convention: 0.00753 = 7.53E-3 Submit Answer Tries 0/45 What is the Ka of HA? Calculate your answer to three sig figs. K₂= Submit Answer Tries 0/45 Now calculate the pH of the solution of HA. pH= Initial Change Equilibrium [HA] [H+] [A]
. Prepare 50 mL of an aqueous solution of 2.5% (w/v) NaCl (sodium chloride, salt).Determine how many grams of sodium chloride are required. Show all steps for this calculation, using dimensional analysis with units clearly identified.2. Prepare this aqueous solution, using a volumetric flask for the precise final volume measurement. It is not a problem to use tap water.3. Clearly write the procedure (step by step) for making this solution
Part 1: A solution of sulfuric acid was made by dissolving 20.0g of 98% sulfuric acid in 250mL of water. (H2SO4 = 98.078 g/mol; H2O = 18.015 g/mol)Answer these items 1-4 for part 1:1. Express the concentration of this solution in % by weight. Additional information for items 2-3: What if the solution has a total volume of 262mL?2. Express the concentration in molarity3. Express the concentration in normality4. Express the concentration in molality Part 2: An alcohol, Ethanol (C2H5OH), is present in 1L of wine that is 12% alcohol by volume. The density of the solution is 0.984 g/mL, and the density of pure alcohol is 0.789 g/mL. (C2H5OH = 46.07 g/mol)Answer these items 1-2 for part 2:1. What is the weight of the alcohol present in wine?2. What is the molarity of the solution?
A biochemist carefully measures the molarity of glycerol in 84.0 mL of photobacterium cell growth medium to be 38.2 µM. Unfortunately, a careless graduate student forgets to cover the container of growth medium and a substantial amount of the solvent evaporates. The volume of the cell growth medium falls to 9.21 mL. Calculate the new molarity of glycerol in the photobacterium cell growth medium. Round each of your answers to 3 significant digits. do x10 Continue Submit Assignment O 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessibility MacBook Air DII DD 000 F10 F11 F12 esc F8 F9 F4 F5 F6 F7 F1 F2 F3 @ $4 6 7. 8. %23