A 5.00 (10.01) mL. Class A transfer pipet is used to transfer 5.00 ml. of a 0.259 (+0.003) M Cu²+ stock solution to a 100.00 (+0.08) Class A volumetric flask. Deionized water is used to bring the flask to volume. Calculate the concentration of the diluted soluion in the volumetric flask and report its absolute uncertainty. Significant figures are graded for this problem. To avoid rounding errors, do not round your answers until the very end of your calculations. [Cu²+] = M H+ M

A 5.00 (10.01) mL. Class A transfer pipet is used to transfer 5.00 ml. of a 0.259 (+0.003) M Cu²+ stock solution to a 100.00 (+0.08) Class A volumetric flask. Deionized water is used to bring the flask to volume. Calculate the concentration of the diluted soluion in the volumetric flask and report its absolute uncertainty. Significant figures are graded for this problem. To avoid rounding errors, do not round your answers until the very end of your calculations. [Cu²+] = M H+ M

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...

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6. The concentration of caffeine in an energy soft drink was determined by standard addition using HPLC. The following procedure was used: a standard caffeine solution was prepared by adding 0.09850g of caffeine to 25.0 cm3 of water.A series of solutions were prepared by adding known volumes of the standard solution to the soft drink before diluting to 100 cm3. The volume of standard and the caffeine peak area are shown in the table: Energy Drink (cm3) Added caffeine Std (cm3) Peak area 15 0 965 15 5 1352 15 10 1739 15 15 2126 15 20 2513 Determine the concentration of caffeine in the soft drink as mg cm-3. A. 3.3 B. 2.3 C. 4.3 D. 7.3
02A: 2.1-2.5 and Accuracy Handout (70 min) ulate Figures of Merit for Trueness ▾ Part A. Absolute Error A breathalyzer is a portable electrochemical instrument that measures the concentration of ethyl alcohol in a sample of exhaled breath A forensic chemist checks the calibration of a breathalyzer by testing a standard air sample known to contain 0.174 mg/L of ethanol seven times. The average value of these seven replicate measurements is found to be 0 157 mg/1 Calculate the absolute error of the breathalyzer. 1971 ΑΣΦΑ Submit Previous Answers Request Answer ? Previous x Incorrect; Try Again: 4 attempts remaining Q Search mgl ly Colle 16 of 17 E dx Next 11:44 PM 1/31/202 BANG &
A calibrated pipet delivers a mean volume of 24.991 mL with a standard uncertainty of ± 0.006 mL. What is the uncertainty if you deliver four aliquots to reach 100 mL?
Please solve the normality of the sample in eq/L and the (DO) content of the sample in mg/L using the following equation.
percentage purity of an ibuprofen sample was determined by a reversed phase HPLC method as follows: Y Der ● A calibration curve of peak area versus concentration (ug/mL) of pure ibuprofen was constructed The ibuprofen sample for analysis was prepared by taking 10.0204 g of powder and dissolving it in/1Lbf distilled water (solution A). 1 ml of the latter solution was further diluted to IL with distilled water (solution B). Solution B was analysed by HPLC analysis Results The equation for the best-fit line of the calibration curve is: y=26820x-1323.8. ● The average peak area for the ibuprofen sample (solution B) was 266796.2 Calculate the percentage purity of the ibuprofen powder.
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A calibrated pipet delivers a mean volume of 24.991 mL with a standard uncertainty of ± 0.006 mL. What is the uncertainty if you deliver four aliquots to reach 100 mL?
You are in the lab preparing copper solutions for the MICRO lab this week. You measure 0.1035 (±0.0001) g of copper metal and dissolve it in a few mLs of concentrated nitric acid. This solution is diluted to the mark with water in a 50.00 (±0.05) mL volumetric flask. You withdraw a 5.00 (±0.01) mL aliquot with a volumetric pipet and deliver it to a 100.00 (±0.08) mL volumetric flask. After dilution to the mark with water, calculate the concentration and the absolute error in a solution of copper in ppm (assume ppm = 1 µg/g = 1 µg/mL = 1 mg/L).
A 10.00 mL of natural water sample containing Ni2+ was pipetted into a volumetric flask and diluted to 50.00 mL with pure water. In the second 10.00 mL of natural water sample transferred into a volumetric flask, exactly 4.00 mL of a Ni2+ solution with a concentration of 5.99 mg/L was added and then diluted to 50.00 mL with pure water. The measured absorbance is A1= 0.436 and A2 = 0.663. What is the Ni2+ concentration in unit of mg/L in the natural water sample?