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

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter11: Properties Of Solutions

Section: Chapter Questions

Problem 109AE: Patients undergoing an upper gastrointestinal tract laboratory test are typically given an X-ray...

See similar textbooks

Similar questions

Cat Noir was tasked to determine the concentration of a CuSO4 unknown solution. She prepared 5 different standards of CuSO4 using the table below as her guide. She ran the standards and the unknown solution in the UV-VIS Spectrophometer, and recorded the absorbances of each solution. Show linear equation derived from calibration curve and solution to concentration of the unknown solution below. Encircle final answer. Cuvette Volume 0.5000 M CuSO4 Volume distilled H2O Absorbance 1 1.000 mL 4.000 mL 0.607 2 2.000 mL 3.000 mL 0.655 3 3.000 mL 2.000 mL 0.709 4 4.000 mL 1.000 mL 0.797 5 5.000 mL 0.000 mL 0.832 Blank 0.000 mL 5.000 mL 0.000 Unknown solution 0.684
Sodium sulfate solution is mixed with a solution of barium chloride. When 8.413 kg of sodium sulfate with 3.672 kg of barium chloride, how many kg of the excess reagent is left over? Please provide an answer with 4 sig figs. Please answer fast i give you upvote.
The alcohol content of hard liquor is normally given in terms of the “proof,” which is defined as twice the percentage by volume of ethanol (C2H5OH) present. Calculate the number of grams of alcohol present in 1.00 L of 75-proof gin. The density of ethanol is 0.798 g/mL. Round off to 4 sig. figures for all calculations made prior to final answer and the final answer should be in 3 sig. figures
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
3. A torsion prescription balance has a sensitivity requirement of 4 mg. Explain how you would weigh 5 mg of hydromorphone hydrochloride with an error not greater than 5%. Use lactose as the diluent
19 g of unknown organic sample was dissolve in 640 mL of Dicloromethane (DCM). The boiling point of benzene was increased by 3.78oC. Determine the molecular weight of the unknown sample? Kb of DCM = 2.42oC/m Bb of benzene = 39.6 oC density of benzene = 1.33 g/mL at 25 °C Round your answer to the nearest whole number, no units required.
1. A 25-mL specific gravity bottle was found to weigh 46.05 g when filled with water, and 52.93 g when filled with the ophthalmic solution. If the empty specific gravity bottle weighs 21.04 g, what is the specific gravity of the ophthalmic solution? a 0.784 b 0.870 c 1.149 d 1.275
If the solubility of a compound A in ether is 30g/100 ml, and the solubility of A in water is 15 g /100 ml. a) If 100 ml of aqueous solution of 3g of A are extracted twice with 100 ml ether. How much A total is extracted? b) How much A would be extracted if only one extraction, but with a volume of 200 ml of ether were extracted? c) What is your conclusion from the amount of A extracted in problems a and b above?
Using dimensional analysis, find the mass of acetylalicylic acid in one tablet of aspirin. The grams of aspirin used in a titration is .325g before being dissolved in 10mL of water and then added to a base, NaOH, with a molarity of .01M and a volume of 10.1 mL. In Chem2.png, the actual question is boxed in red Video used for titration assignment (Not needed for question): https://www.youtube.com/watch?v=x9jgjdizTaY
Patients undergoing an upper gastrointestinal tract laboratory test are typically given an X-ray contrast agent that aids with the radiologic imaging of the anatomy. One such contrast agent is sodium diatrizoate, a nonvolatile water-soluble compound. A 0.378-m solution is prepared by dissolving 38.4 g sodium diatrizoate (NaDTZ) in.l.60 102 mL water at 3 1.2C (the density of water at 31.2C is 0.995 g/cm3). What is the molar mass of sodium diatrizoate? What is the vapor pressure of this solution if the vapor pressure of pure water at 31.2C is 34.1 torr?
Substance Melting Points in ℃ Benzoic acid 122.3 ℃ Succinimide 125-127 Urea 133 ℃ Cinnamic acid (trans). 133 ℃ Thiourea 182 ℃ Hippuric acid. 187 ℃ For Questions 1-3 assume that you were given 5.00 g of an unknown A for this lab, one of the six compounds whose melting points you looked up for prelab. 1. You recrystallized A and obtained 2.23 g pure product. What was your percent recovery? That is, what percent of the original mass did you get back? Show your work. 2. Assume you took the melting point of the pure product and it was 123oC. Considering…
1. Which of the following compounds can form hydrogen bonds with water?a. octaneb. HClc. NaCld. acetic acid2. Maria wants to determine the percent water content of an unknown hydrate of AB. Given the following data:mass of empty crucible - 12. 2784gmass of AB · xH20 + crucible - 17.4960gmass of AB + crucible - 15.1314gCalculate the % water content of the hydrate3. From the above data, give the correct formula for the hydrate. (AB₂ Molar mass = 129.84 g/mol)