The labware we used in Quant Lab is divided into “qualitative” or “quantitative” analytical purpose. One of the important laboratory skills we learned is to know what specific apparatus is appropriate for the task at hand. For the following procedures, which SPECIFIC glassware, or balance ( CORRECT NAMES, be specific ) should be used? Measure out 2 mL of concentrated H2SO4 solution to dissolve the copper oxide ore sample.. _________________ Deliver 10.00 mL of the stock fluoride solution to be diluted to 100 mL. ________________________ Weigh out about 0.42 g of NaF standard to be dried in an oven.

The labware we used in Quant Lab is divided into “qualitative” or “quantitative” analytical purpose. One of the important laboratory skills we learned is to know what specific apparatus is appropriate for the task at hand. For the following procedures, which SPECIFIC glassware, or balance ( CORRECT NAMES, be specific ) should be used? Measure out 2 mL of concentrated H2SO4 solution to dissolve the copper oxide ore sample.. _ Deliver 10.00 mL of the stock fluoride solution to be diluted to 100 mL. ________ Weigh out about 0.42 g of NaF standard to be dried in an oven.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter8: Sampling, Standardization, And Calibration

Section: Chapter Questions

Problem 8.1QAP

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9- An aqueous solution at 25 C has a H,O concentration of 2. x 10 M. Calculate the OH concentration. Be sure your answer has 1 significant digits. || M x10 I Don't Know Submit O 2022 McGraw Hill LLC. All Rights Reserved. Tems of Use Privacy Center Accessibility 5:05 5/9/20 DELL F2 F3 F4 FS F6 F7 F8 F9 F10 F11 F12 PrtSc Insert Delete %23 & Num Lock Backspace 5 8 T CU D F K Enter く0
A stock solution whose concentration is 25.00 mg/mL was provided. A primary standard solution was then prepared by transferring 5.00 mL of the stock solution into a 50.00 mL volumetric flask. The primary standard solution was used to prepare three standard solutions of different concentrations by taking different volumes of aliquots into three 25.00 mL volumetric flasks: Standard Solution #1 #2 #3 Amount of Primary Solution (mL) 5.00 10.00 15.00 Three 25.00 mL volumetric flasks were then diluted to mark with water. Questions #1 What is the concentration of the primary standard solutions, expressed in units of mg/ml? #2 Re-write the concentration of the primary standard solutions obtained from Q#1 in units of μg/mL. #3 Determine the concentrations of three standard solutions in units of µg/mL. #4 What is a requirement for a "blank" solution used in calibration in spectrophotometry? Page 5 (Experiment #3)
Show your complete solution and round-off your answers to four decimal places. A 0.1093-g sample of impure Na2CO3 was analyzed by the Volhard method. After adding 50.00 mL of 0.06911 N AgNO3, the sample was back titrated with 0.05781 N KSCN, requiring 27.36 mL to reach the end point. Calculate the % purity of the Na2CO3 sample. Answer = _% Na2CO3
A student was given a stock ascorbic acid solution of 2.323 mg/L. Following the directions in the lab, the student obtained the data below. Calculate the concentration of ascorbic acid in the Standard (in microgram/L, ug -). Report your answer with one place after the decimal. initial final initial volume final volume volume volume color reagent color reagent stock stock solution solution solution solution Standard 1.35 mL 6.64 mL 5.12 mL 9.32 mL
An aqueous solution at 25 °C has a H,0' concentration of 7. x 10 °M. Calculate the OH concentration. Be sure your answer has the correct number of significant digits. Show all 9 Discussion week.docX pen dayum.pdf POF 3:51 PM ヘ梦の P Type here to search 5/4/2021 hp 24 to tyo insert prt sc delete 144 esC & 7 % 4. backspace home E R Y
A student needs 25.0 mL of 7.18x10 4 M FD&C Blue Dye No. 2 solution. If the student has 2.00 mM FD&C Blue Dye No. 2 stock solution to work with, how much of the 2.00 mM solution should be added to the 25.0 mL volumetric flask? Hint, 2.00 mM is 0.00200 M. O 0.1114 mL O 7.474 mL O 1.114 mL 8.974 mL 2.786 mL
Titration of Vinegar Experimental Data Trial 1 Trial 2 Initial Buret Reading 0.05 mL 0.02 mL Final Buret Reading 25.25 mL 23.22 mL Volume of base used Molarity of base used 0.1045 M 0.1045 M Volume of vinegar used 5.00 mL 5.00 mL
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1:06 1 | 5GE Question 22 of 25 Submit What is the molarity of an aqueous solution that contains 0.0720 g C2H,O, per gram of solution. The density of the solution is 1.04 g/mL STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) 1.21 0.0720 g C2H,O2/mol 1 1.21 x 10-3 mL solution 1.12 g C2H,O2/g solution 4650 mol C2H,O2 62.08 g solution/mL 0.001 g solution 6.022 x 1023 M C2H,O2 1000 g C2H,O2 1.04 L solution
1 of 2 - + Automatic Zoom 1. In this experiment, you will make a set of solutions containing different concentrations of crystal violet (CV) by mixing different volumes of a stock CV* solution with water to give final volumes of 3.0 mL. The stock solution of CV+ has a concentration of 2.0 x 10-5 M and is dark purple. The diluted solutions will be prepared in cuvettes. 2.0 x 105 M CV* (purple) H₂O V1 diluted samples of CV* in cuvettes 3.0 mL= V₂ Use c₁V₁= C₂V₂ to calculate the volume of the stock 2.0 x 105 M CV+ AND the volume of water to make a 3.0 mL sample of 7.5 x 10-6 M CV+. Show all of your calculations.
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4 . The labware we used in Quant Lab is divided into “qualitative” or “quantitative” analytical purpose. One of the important laboratory skills we learned is to know what specific apparatus is appropriate for the task at hand. For the following procedures, which SPECIFIC glassware, or balance ( CORRECT NAMES, be specific ) should be used? Weigh about 2 g of solid KI to be added to the sample solution. ___________ Obtain a unknown water sample to be diluted to 250 mL for the determination of its hardness. ____________ Collect washings from the crucible suction to see if the AgCl precipitate still contains unreacted silver (I). _________ Mix K2Cr2O7 and KI solutions to be ready for titration. The mixture container is _______________ Measure the mV values of fluoride standard and sample solutions. Theoretically, the solution containers should be _______________________ Weigh 1 g solid KSCN that is poured into the thiosulfate – iodine titration.…