Recent questions in Chemistry

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What is the concentration of calcium ions (Ca2+) in a given solution using an ion-selective electrode if the electrode reading is 0.0032 V and the calibration curve shows a linear relationship between calcium concentration and electrode potential with a slope of -28.4 mV per decade?

asked Jan 30 in Analytical Chemistry by DeenaTrundle (2.2k points)

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1 answer 83 views

What is the concentration of caffeine in a sample of coffee using liquid chromatography?

asked Jan 30 in Analytical Chemistry by VickeyBatema (1.9k points)

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1 answer 92 views

What is the concentration of caffeine in a particular brand of coffee, using liquid chromatography as the primary analytical technique?

asked Jan 30 in Analytical Chemistry by Wilbur29087 (1.8k points)

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1 answer 103 views

What is the concentration of caffeine in a particular brand of coffee obtained through liquid chromatography?

asked Jan 30 in Analytical Chemistry by ChasityLearm (2.1k points)

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1 answer 100 views

What is the concentration of caffeine in a freshly brewed cup of coffee? Using liquid chromatography, analyze the composition of the coffee sample and determine the peak for caffeine. From the peak area and a known standard of caffeine, calculate the concentration of caffeine in the coffee sample.

asked Jan 30 in Analytical Chemistry by Damon31M1921 (2.4k points)

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1 answer 91 views

What is the concentration of an HCl solution if 25.00 mL of the solution requires 35.80 mL of 0.100 M NaOH to reach the endpoint during titration?

asked Jan 30 in Analytical Chemistry by PearlEaston (2.3k points)

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1 answer 73 views

What is the concentration of an HCl solution if 25.0 ml of the solution requires 35.0 ml of 0.10 M NaOH solution to reach the endpoint of titration?

asked Jan 30 in Analytical Chemistry by AngeliaDewey (1.8k points)

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1 answer 106 views

What is the concentration of a unknown copper(II) ion solution using polarography if a current of 2.5 mA is recorded at an applied potential of -0.45 V? The standard reduction potential of Cu2+ to Cu is -0.34 V.

asked Jan 30 in Analytical Chemistry by LucieFernand (2.0k points)

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1 answer 86 views

What is the concentration of a substance in a given sample, using the polarographic method with a measurement potential of -0.4 V and a current of 3.5 mA, if the substance has a limiting current of 5.2 mA?

asked Jan 30 in Analytical Chemistry by BrandiBeer01 (2.4k points)

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1 answer 102 views

What is the concentration of a specific protein in a sample of human blood serum and how does it compare to the normal physiological range, using capillary electrophoresis?

asked Jan 30 in Analytical Chemistry by WallaceUpsha (2.4k points)

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1 answer 85 views

What is the concentration of a specific compound in a given sample using liquid chromatography?

asked Jan 30 in Analytical Chemistry by JanniePeek84 (2.0k points)

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1 answer 68 views

What is the concentration of a solution of iron(II) sulfate if its absorbance at a wavelength of 495 nm is 0.456 in a 1 cm cuvette with a path length of 1 cm? The molar absorptivity of iron(II) sulfate at 495 nm is 8100 L/mol·cm. The molecular weight of iron(II) sulfate is 151.91 g/mol.

asked Jan 30 in Analytical Chemistry by Mose2866156 (1.6k points)

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1 answer 76 views

What is the concentration of a solution of hydrochloric acid (HCl) in moles per liter (M) if 25 milliliters of the HCl solution reacts completely with 35 milliliters of a 0.1 M solution of sodium hydroxide (NaOH) during a titration process?

asked Jan 30 in Analytical Chemistry by NamSampson2 (1.8k points)

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1 answer 85 views

What is the concentration of a solution containing CuSO4 if its absorbance is 0.472 at a wavelength of 620 nm? The molar absorptivity of CuSO4 at this wavelength is 2.34 x 10^4. The solution has a path length of 1 cm.

asked Jan 30 in Analytical Chemistry by HarryNewell7 (1.9k points)

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1 answer 84 views

What is the concentration of a solution containing an unknown amount of lead ions if it requires 25 milliliters of 0.1 M potassium iodide (KI) solution to titrate completely in a polarographic analysis?

asked Jan 30 in Analytical Chemistry by VictorR1855 (2.2k points)

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1 answer 103 views

What is the concentration of a solution containing 0.25 grams of copper (Cu) metal, that was dissolved in 50 mL of a 0.5 M sulfuric acid (H2SO4) solution, using coulometry? The atomic weight of copper is 63.55 g/mol.

asked Jan 30 in Analytical Chemistry by KraigFeldman (2.2k points)

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1 answer 77 views

What is the concentration of a sodium hydroxide (NaOH) solution if it takes 25 mL of 0.1 M hydrochloric acid (HCl) to neutralize 30 mL of the NaOH solution in a titration experiment?

asked Jan 30 in Analytical Chemistry by AugustBranno (2.5k points)

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1 answer 86 views

What is the concentration of a particular protein in a given sample of blood plasma, and how does it compare to the normal concentration range? Analyze the composition of the blood plasma using the capillary electrophoresis technique and determine the concentration of the protein of interest. Compare the results with the established normal range to evaluate the potential health implications of the protein concentration in the sample.

asked Jan 30 in Analytical Chemistry by DwainCarlisl (2.0k points)

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1 answer 102 views

What is the concentration of a particular amino acid (e.g. glycine) in a given protein sample using capillary electrophoresis?

asked Jan 30 in Analytical Chemistry by YQYFlora9901 (1.9k points)

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1 answer 87 views

What is the concentration of a hydrochloric acid solution if 25.00 mL of it requires 34.87 mL of a 0.120 M sodium hydroxide solution to reach a neutral pH during titration?

asked Jan 30 in Analytical Chemistry by ChauFrederic (1.2k points)

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