Recent questions in Analytical Chemistry

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What is the chemical structure of compound X, as determined by analyzing its nuclear magnetic resonance spectrum?

asked 6 days ago in Analytical Chemistry by NumbersJacks (870 points)

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1 answer 65 views

What is the chemical structure of an unknown compound if its proton NMR spectrum displays a triple peak at δ 1.2, a singlet peak at δ 2.0, a doublet peak at δ 3.6, and a quartet peak at δ 7.5?

asked 6 days ago in Analytical Chemistry by BrittneyN44 (350 points)

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What is the chemical formula of the unknown compound that has a molecular ion peak (M+) at m/z 146, and major fragment peaks at m/z 120 and 105 in the mass spectrum, and has the molecular ion peak four times more intense than the base peak? Use mass spectrometry to identify the unknown compound.

asked 6 days ago in Analytical Chemistry by KraigMoore5 (630 points)

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1 answer 57 views

What is the chemical formula of an unknown compound that contains 60% carbon, 13.3% hydrogen, and 26.7% oxygen by mass, determined through elemental analysis?

asked 6 days ago in Analytical Chemistry by ChanteCamari (610 points)

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1 answer 54 views

What is the chemical composition of a sample of unknown compound using X-ray diffraction analysis?

asked 6 days ago in Analytical Chemistry by BennyCrain61 (510 points)

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1 answer 65 views

What is the chemical composition of a given rock sample? Use X-ray diffraction analysis to identify the minerals present in the sample and determine their relative abundances.

asked 6 days ago in Analytical Chemistry by LottieNvb113 (230 points)

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1 answer 69 views

What is the chemical composition of a given crystalline substance using X-ray diffraction analysis and how can it be determined from the diffraction pattern obtained?

asked 6 days ago in Analytical Chemistry by TyreeHayward (610 points)

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1 answer 46 views

What is the best electrophoresis technique to use for separating and analyzing the composition of proteins in a complex sample mixture?

asked 6 days ago in Analytical Chemistry by Dusty1260020 (550 points)

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1 answer 61 views

What is the amount of silver ions present in a sample of a 0.500 M silver nitrate solution after the complete electrolysis of 50.0 mL using coulometric titration at a constant current of 2.00 mA for 25.0 minutes?

asked 6 days ago in Analytical Chemistry by ReaganWoolls (850 points)

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1 answer 66 views

What is the amount of CuSO4 present in a given sample using coulometry if a constant current of 50 mA is passed through the sample for 30 minutes, and 30.6 mA-h of charge is consumed in the process?

asked 6 days ago in Analytical Chemistry by Valentin4290 (410 points)

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1 answer 57 views

What is the amount of copper sulfate (CuSO4) present in a sample of 5.00 grams of a compound containing only copper sulfate? Use gravimetric analysis to determine the answer.

asked 6 days ago in Analytical Chemistry by VivienScheff (510 points)

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1 answer 54 views

What is the amount of copper present in a 2-g copper wire using coulometry?

asked 6 days ago in Analytical Chemistry by TyroneSauer (330 points)

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1 answer 55 views

What is the amount of copper present in a 0.2500 g sample of a copper salt, if it requires 12500 C of electricity to completely deposit it during coulometric titration?

asked 6 days ago in Analytical Chemistry by NobleHockman (310 points)

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1 answer 31 views

What is the amount of copper ions present in a sample if 5.25 grams of the sample produces a current of 2.35 A for 2 hours during coulometry analysis? The molar mass of copper is 63.55 g/mol and the sample contains only copper ions.

asked 6 days ago in Analytical Chemistry by RegenaMannin (370 points)

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1 answer 49 views

What is the amount of copper ions present in a 1.0 mL sample of copper sulfate solution, when a current of 3.0 A for 10 seconds is used for coulometry analysis, assuming 100% efficiency in electrode reactions and a coulombic efficiency of 90%?

asked 6 days ago in Analytical Chemistry by IsaacRubbo84 (590 points)

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1 answer 42 views

What is the amount of copper ions present in a 0.01 M CuSO4 solution that is electrolyzed for 10 minutes using a current of 0.3 A?

asked 6 days ago in Analytical Chemistry by [empty] (270 points)

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1 answer 52 views

What is the amount of copper ions in a 0.1 M CuSO4 solution if it takes 10 minutes to completely electrolyze (under constant current of 0.15 A) a 35-mg copper wire which is in contact with the solution?

asked 6 days ago in Analytical Chemistry by TamiUdl83036 (650 points)

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1 answer 79 views

What is the amount of copper in a sample of copper ore using coulometric titration with a silver anode?

asked 6 days ago in Analytical Chemistry by LindaTedesch (450 points)

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1 answer 67 views

What is the amount of copper in a sample of an unknown compound if 25.0 mL of a 0.050 M EDTA solution is required to titrate a 0.100 g sample of the compound using coulometry?

asked 6 days ago in Analytical Chemistry by RosellaThibo (350 points)

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1 answer 67 views

What is the amount of copper (II) sulfate in a sample of solution if 4.00 coulombs of charge are needed to completely oxidize it at the anode during a coulometric titration? The molarity of the titrant solution is 0.025 M and the volume of the titrant used is 100 mL.

asked 6 days ago in Analytical Chemistry by ClydeMcclure (550 points)

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