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What is the concentration of iron (II) ions in a water sample if the absorbance of the sample at a wavelength of 565 nm is measured to be 0.842 and it was found that a 1 cm cuvette contains 1.25 x 10^-4 moles of iron (II) ions? (The molar absorptivity of iron (II) ions at 565 nm is 1.9 x 10^4 L/mol cm).

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

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What is the concentration of iron (II) ions in a solution if the absorbance reading from the colorimeter is 0.43 and the path length of the solution in the cuvette is 1 cm? The molar absorption coefficient of iron (II) ions is 6.16 x 10^3 M^-1 cm^-1. The solution has a volume of 10 mL. Calculate the concentration of iron (II) ions in the solution in units of Molarity.

asked Jan 30 in Analytical Chemistry by Jaqueline50I (2.0k points)

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What is the concentration of iron (II) ions in a sample of tap water? Use colorimetry to determine the absorbance of the sample and compare it to a standard calibration curve for iron (II) ions.

asked Jan 30 in Analytical Chemistry by TBHMelaine51 (2.2k points)

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What is the concentration of iron (II) ions in a given solution using spectrophotometry if the absorbance value obtained from a calibration curve is 0.58 and the molar absorptivity of iron (II) ions at the given wavelength is 9.6 x 10^3 L mol^-1 cm^-1?

asked Jan 30 in Analytical Chemistry by LuzGerste41 (1.9k points)

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What is the concentration of iron (II) ion in a sample of drinking water using colorimetry, if the absorbance of the sample is found to be 0.294 and the molar absorption coefficient of iron (II) complex is 10,500 M^-1 cm^-1 at the wavelength of 505 nm?

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

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What is the concentration of iron (II) in a water sample collected from a local river using colorimetry?

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

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What is the concentration of iron (II) in a sample of water collected from a local stream, given that the absorbance of the sample is 0.35 at a wavelength of 565 nm? The iron (II) ions form a complex with 1,10-phenanthroline, which has a molar extinction coefficient of 7.58 x 10^3 L mol^-1 cm^-1 at the same wavelength.

asked Jan 30 in Analytical Chemistry by KariMcCleary (1.5k points)

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What is the concentration of iron (Fe) present in a given water sample using colorimetry as the analytical method, given that the absorbance at a wavelength of 565 nm is 0.423 and the molar absorptivity of the Fe-phenanthroline complex is 11,100 M^-1 cm^-1?

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

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What is the concentration of iron (Fe) ions in a water sample collected from a river using spectrophotometry with an absorbance reading of 0.75 and known molar absorptivity of 3.6 x 10^3 L mol^-1 cm^-1? The sample has a path length of 1 cm and a volume of 25 mL.

asked Jan 30 in Analytical Chemistry by LavernEcm901 (1.8k points)

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What is the concentration of iron (Fe) in a water sample using cyclic voltammetry?

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

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What is the concentration of iron (Fe) in a sample of water collected from a nearby river using spectrophotometric analysis?

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

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What is the concentration of iron (Fe) in a sample of river water using spectrophotometry at a wavelength of 510 nm? Given that the absorbance value of the sample at 510 nm is 0.42, and the molar absorptivity of iron (Fe) at that wavelength is 18,000 M^-1 cm^-1.

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

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What is the concentration of iron (Fe) in a sample of river water using spectrophotometric analysis with a known calibration curve and absorbance of 0.25 at a wavelength of 510 nm? The molar absorptivity of Fe at 510 nm is 8.70 x 10^3 M^-1cm^-1 and the path length of the cuvette used is 1.0 cm.

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

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What is the concentration of iron (Fe) in a given water sample using spectrophotometry?

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

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What is the concentration of hydrochloric acid (HCl) in a solution, given that 25 mL of this solution requires 0.10 M sodium hydroxide (NaOH) to reach the equivalence point during a titration?

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

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What is the concentration of hydrochloric acid (HCl) in a solution if it took 25.0 mL of 0.100 M sodium hydroxide (NaOH) to neutralize 30.0 mL of the HCl solution?

asked Jan 30 in Analytical Chemistry by CesarForlong (1.7k points)

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What is the concentration of hydrochloric acid (HCl) in a solution if 25mL of 0.1M sodium hydroxide (NaOH) is required to completely neutralize 20mL of the acid?

asked Jan 30 in Analytical Chemistry by AlineBacon1 (1.5k points)

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What is the concentration of hydrochloric acid (HCl) in a solution if 25 mL of 0.1 M sodium hydroxide (NaOH) was required to neutralize 50 mL of HCl solution using titration technique?

asked Jan 30 in Analytical Chemistry by IFYRussel191 (2.2k points)

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What is the concentration of hydrochloric acid (HCl) in a 100 mL solution if it requires 50 mL of 0.1 M sodium hydroxide (NaOH) to neutralize it during a titration process?

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

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What is the concentration of fluoride ions present in a sample of drinking water using a fluoride ion-selective electrode?

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

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