Recent questions in Chemistry

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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 HoseaForney9 (370 points)

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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 SheltonHerve (330 points)

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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 JuanMassina7 (430 points)

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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 OVJLeslee839 (250 points)

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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 HamishChappe (310 points)

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What is the concentration of a hydrochloric acid solution if 25 ml of the solution requires 18 ml of a 0.1 M sodium hydroxide solution for complete neutralization during a titration?

asked Jan 30 in Analytical Chemistry by ZCUHannelore (470 points)

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1 answer 92 views

What is the concentration of a hydrochloric acid solution if 25 mL of the solution requires 15 mL of 0.1 M sodium hydroxide for complete neutralization?

asked Jan 30 in Analytical Chemistry by DerrickRhode (250 points)

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1 answer 90 views

What is the concentration of a hydrochloric acid (HCl) solution in moles per liter (M) if 25 mL of a 0.1 M sodium hydroxide (NaOH) solution is required to neutralize 50 mL of the HCl solution?

asked Jan 30 in Analytical Chemistry by FrederickaCe (550 points)

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1 answer 92 views

What is the concentration of a hydrochloric acid (HCl) solution if 25.0 ml of it requires 30.0 ml of 0.1 M sodium hydroxide (NaOH) to completely react in a titration?

asked Jan 30 in Analytical Chemistry by EzraBunning (350 points)

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1 answer 77 views

What is the concentration of a copper(II) ion (Cu2+) solution using polarography if the current at -0.5 V vs. saturated calomel electrode (SCE) is 10 mA and the current at -1.0 V vs. SCE is 25 mA, assuming the standard reduction potential of Cu2+/Cu is +0.34 V vs. SCE and the supporting electrolyte is 0.1 M KCl?

asked Jan 30 in Analytical Chemistry by NidaTimms920 (390 points)

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1 answer 78 views

What is the concentration of a copper sulfate solution if 40.0 mL of the solution requires 1350 coulombs of charge to fully oxidize all the copper ions present, using a coulometric titration method? The solution was prepared by dissolving a sample of copper sulfate pentahydrate in water and diluting it to a final volume of 500 mL. Given the molar mass of copper sulfate pentahydrate and the total charge required to oxidize one mole of copper ions.

asked Jan 30 in Analytical Chemistry by BennieBrasse (190 points)

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What is the concentration of a copper (II) sulfate solution if its absorbance value at 620 nm is 0.45? Use a standard calibration curve with known concentrations of copper (II) sulfate and their corresponding absorbance values to determine the unknown concentration of the solution using colorimetry.

asked Jan 30 in Analytical Chemistry by FlorianDoder (270 points)

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1 answer 73 views

What is the concentration of a copper (II) sulfate solution if its absorbance is measured to be 0.25 using a spectrophotometer with a 1 cm cuvette and a wavelength of 620 nm, assuming a molar absorptivity of 5,400 M^-1cm^-1?

asked Jan 30 in Analytical Chemistry by DannMcGoldri (510 points)

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1 answer 64 views

What is the concentration in molarity of a hydrochloric acid solution if it requires 25 mL of a 0.1 M sodium hydroxide solution to neutralize 20 mL of the acid solution?

asked Jan 30 in Analytical Chemistry by EmilPeeples5 (390 points)

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1 answer 67 views

What is the concentration and identity of proteins present in the given sample using electrophoresis analysis?

asked Jan 30 in Analytical Chemistry by IngeDeBernal (330 points)

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1 answer 86 views

What is the concentration and composition of the amino acids present in a given protein sample using capillary electrophoresis as the analytical method?

asked Jan 30 in Analytical Chemistry by LucaTedesco (330 points)

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1 answer 90 views

What is the concentration (in units of moles/liter) of hydrochloric acid (HCl) in a solution based on a titration experiment, in which 25.00 mL of 0.10 M sodium hydroxide (NaOH) solution is required to neutralize 20.00 mL of the HCl solution?

asked Jan 30 in Analytical Chemistry by VBPAnnie1368 (430 points)

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1 answer 61 views

What is the concentration (in ppm) of caffeine in a given sample of coffee extract, determined using liquid chromatography?

asked Jan 30 in Analytical Chemistry by JessieStGeor (390 points)

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1 answer 82 views

What is the concentration (in moles per liter) of a hydrochloric acid (HCl) solution if 25 mL of the solution reacts with 50 mL of a 0.1 M sodium hydroxide (NaOH) solution during a titration process?

asked Jan 30 in Analytical Chemistry by LoisPenny954 (410 points)

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1 answer 83 views

What is the concentration (in molarity) of a hydrochloric acid solution, HCl, if 25.0 ml of a 0.100 M sodium hydroxide solution, NaOH, was required to neutralize 35.0 ml of the HCl solution during a titration?

asked Jan 30 in Analytical Chemistry by JanetHowitt0 (270 points)

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