A solution was made by using an unknown amount of 1ppm quinine solution in a 25mL...
A solution was made by using an unknown amount of 1ppm quinine solution in a 25mL volumetric flask (was diluted to line). How many mL of solution was used if the end sample had a concentration of 0.017ppm?
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A solution was made by using an unknown amount of 1ppm quinine
solution in a 25mL...
An unknown amount of a compound with a molecular mass of 294.46 g/mol is dissolved in...
An unknown amount of a compound with a molecular mass of 294.46 g/mol is dissolved in a 10 mL volumetric flask. A 1.00 mL aliquot of this solution is transferred to a 25 mL volumetric flask, and enough water is added to dilute to the mark. The absorbance of this diluted solution at 343 nm is 0.456 in a 1.000 cm cuvette. The molar absorptivity for this compound at 343 nm is €343 = 5721 M-?cm-1. What is the concentration...
An unknown amount of a compound with a molecular mass of 284.04 g/mol is dissolved in...
An unknown amount of a compound with a molecular mass of 284.04 g/mol is dissolved in a 10 mL volumetric flask. A 1.00 mL aliquot of this solution is transferred to a 25 mL volumetric flask, and enough water is added to dilute to the mark. The absorbance of this diluted solution at 347 nm is 0.472 in a 1.000 cm cuvet. The molar absorptivity for this compound at 347 nm is ?347=6023 M−1cm−1. What is the concentration of the...
An unknown amount of a compound with a molecular mass of 270.93 g/mol is dissolved in...
An unknown amount of a compound with a molecular mass of 270.93 g/mol is dissolved in a 10-mL volumetric flask. A 1.00-mL aliquot of this solution is transferred to a 25-mL volumetric flask and e water is added to dilute to the mark. The absorbance of this diluted solution at 339 nm is 0.517 in a 1 cm cuvette. The molar absorptivity for this compound at 339 nm is esso- 5835 M-1cm-1 (a) What is the concentration of the compound...
An unknown amount of a compound with a molecular mass of 259.45 g/mol is dissolved in...
An unknown amount of a compound with a molecular mass of 259.45 g/mol is dissolved in a 10-mL volumetric flask. A 1,00-mL aliquot of this solution is transferred to a 2 L volumetric flask and o the mark. The absorbance of this diluted solution at 347 nm is 0.468 in a 1 cm cuvette. The molar (a) What is the concentration of the compound in the cuvette? Number b) What is the concentration of the compound in the 10-ml flask?...
An unknown was analyzed by GC for limonene using butylbenzene as an internal standard. A plot...
An unknown was analyzed by GC for limonene using butylbenzene as an internal standard. A plot of peak area ratio of limonene/butylbenzene vs limonene concentrations (ug/mL) gave a line with slope and y-intercept of: m 11.44 b -0.5000 A 0.1 mL of the unknown solution was added to a 10mL volumetric flask, butylbenzene was added to the same concentration as all of the standards and the solution diluted to volume. The area ratio for the limonene/butylbenzene was 96.2 for the...
Question 1 2 pts 3.34 mL of an unknown glucose solution was diluted in a 100.00 mL of volumetric flask with distill...
Question 1 2 pts 3.34 mL of an unknown glucose solution was diluted in a 100.00 mL of volumetric flask with distilled water. 10mL of that solution and 4.00 mL of the ferricyanide reagent was placed in a second 100.00 mL volumetric flask and diluted to the mark with distilled water. Spectrophotometric analysis of the glucose/ferricyanide solution showed that the concentration of glucose was 0.070 M. What is the concentration of glucose in the unknown solution?
Question 1 2 pts 3.34 mL of an unknown glucose solution was diluted in a 100.00 mL of volumetric flask with distill...
Question 1 2 pts 3.34 mL of an unknown glucose solution was diluted in a 100.00 mL of volumetric flask with distilled water. 10mL of that solution and 4.00 mL of the ferricyanide reagent was placed in a second 100.00 mL volumetric flask and diluted to the mark with distilled water. Spectrophotometric analysis of the glucose/ferricyanide solution showed that the concentration of glucose was 0.070 M. What is the concentration of glucose in the unknown solution?
A student obtains 500.0 mL of a solution containing an unknown concentration of calcium iodide, CaI...
A student obtains 500.0 mL of a solution containing an unknown concentration of calcium iodide, CaI 2. She pipets 25 mL of this solution into a 100 mL volumetric flask and dilutes to the mark. She then pipets 10 mL of this diluted solution into a 50 mL volumetric flask and dilutes to the mark. She analyzes some of the solution from the final volumetric flask and finds that the iodide ion concentration is 0.0000064 M. Determine the molar concentration...
A student wishes to prepare 300-mL of a 0.236 M iron(III) acetate solution using solid iron(III)...
A student wishes to prepare 300-mL of a 0.236 M iron(III) acetate solution using solid iron(III) acetate, a 300-ml volumetric flask, and deionized water. (a) How many grams of iron(III) acetate must the student weigh out? (b) Which of the following would NOT be an expected step in the procedure used by the student? O Add additional water to the flask, mixing as each portion is added. O Add a small amount of water to the volumetric flask and swirl...
MOLARITY=0.02099 Experiment 7 Data and Calculation s: Analysis of an Unknown Chloride M Molarity of standard...
MOLARITY=0.02099 Experiment 7 Data and Calculation s: Analysis of an Unknown Chloride M Molarity of standard AgNO, solution п mL ml. ml Initial buret reading 9.8 mL -59 11-9 ml. Final buret reading Volame of AgNO, used to titrate sample ml. ml. ml. Moles of AgNO, used to titrate sample Moles of CT peesent in sample Volane of diluted chloride solution pipetted 10 mL. ml. mL. Total moles of CI in 100 ml, vol flask I concentration in diluted solation...
An unknown amount of a compound with a molecular mass of 294.46 g/mol is dissolved in a 10 mL volumetric flask. A 1.00 mL aliquot of this solution is transferred to a 25 mL volumetric flask, and enough water is added to dilute to the mark. The absorbance of this diluted solution at 343 nm is 0.456 in a 1.000 cm cuvette. The molar absorptivity for this compound at 343 nm is €343 = 5721 M-?cm-1. What is the concentration...
An unknown amount of a compound with a molecular mass of 270.93 g/mol is dissolved in a 10-mL volumetric flask. A 1.00-mL aliquot of this solution is transferred to a 25-mL volumetric flask and e water is added to dilute to the mark. The absorbance of this diluted solution at 339 nm is 0.517 in a 1 cm cuvette. The molar absorptivity for this compound at 339 nm is esso- 5835 M-1cm-1 (a) What is the concentration of the compound...
An unknown amount of a compound with a molecular mass of 259.45 g/mol is dissolved in a 10-mL volumetric flask. A 1,00-mL aliquot of this solution is transferred to a 2 L volumetric flask and o the mark. The absorbance of this diluted solution at 347 nm is 0.468 in a 1 cm cuvette. The molar (a) What is the concentration of the compound in the cuvette? Number b) What is the concentration of the compound in the 10-ml flask?...
An unknown was analyzed by GC for limonene using butylbenzene as an internal standard. A plot of peak area ratio of limonene/butylbenzene vs limonene concentrations (ug/mL) gave a line with slope and y-intercept of: m 11.44 b -0.5000 A 0.1 mL of the unknown solution was added to a 10mL volumetric flask, butylbenzene was added to the same concentration as all of the standards and the solution diluted to volume. The area ratio for the limonene/butylbenzene was 96.2 for the...
Question 1 2 pts 3.34 mL of an unknown glucose solution was diluted in a 100.00 mL of volumetric flask with distilled water. 10mL of that solution and 4.00 mL of the ferricyanide reagent was placed in a second 100.00 mL volumetric flask and diluted to the mark with distilled water. Spectrophotometric analysis of the glucose/ferricyanide solution showed that the concentration of glucose was 0.070 M. What is the concentration of glucose in the unknown solution?
Question 1 2 pts 3.34 mL of an unknown glucose solution was diluted in a 100.00 mL of volumetric flask with distilled water. 10mL of that solution and 4.00 mL of the ferricyanide reagent was placed in a second 100.00 mL volumetric flask and diluted to the mark with distilled water. Spectrophotometric analysis of the glucose/ferricyanide solution showed that the concentration of glucose was 0.070 M. What is the concentration of glucose in the unknown solution?
A student wishes to prepare 300-mL of a 0.236 M iron(III) acetate solution using solid iron(III) acetate, a 300-ml volumetric flask, and deionized water. (a) How many grams of iron(III) acetate must the student weigh out? (b) Which of the following would NOT be an expected step in the procedure used by the student? O Add additional water to the flask, mixing as each portion is added. O Add a small amount of water to the volumetric flask and swirl...
MOLARITY=0.02099 Experiment 7 Data and Calculation s: Analysis of an Unknown Chloride M Molarity of standard AgNO, solution п mL ml. ml Initial buret reading 9.8 mL -59 11-9 ml. Final buret reading Volame of AgNO, used to titrate sample ml. ml. ml. Moles of AgNO, used to titrate sample Moles of CT peesent in sample Volane of diluted chloride solution pipetted 10 mL. ml. mL. Total moles of CI in 100 ml, vol flask I concentration in diluted solation...
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