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A 25.00 mL of a sample containing both Fe3+ and Cu2+ required 16.06 mL of 0.05083M EDTA to completely titrate both cations. A 50.00 mL sample of the unknown was treated with NH4F to protect the Fe3+. The Cu2+ was then reduced and masked with thiourea. Addition of 25.00 mL of the 0.05083 mL EDTA liberated the Fe3+, forming a complex. The excess EDTA from this reaction required 19.77 mL of 0.01883 M Pb2+ standard solution to reach an end point. Calculate [Cu2+] in the unknown
A student substitutes his unknown for the NaBrO3. The dichloroethene layer turns dark orange. Which ions could be ruled out and what test should be performed next?
Looks like 4-Methyl-2-Pentanone to me, can someone verify and explain in depth why it's such compound ... NMR picture in the comment below
The combustion of how many moles of ethane C2H6 would be required to heat 587g of water from 25 degree to 78 degree. ( assume liquid water is formed during combustion.)
If the mixture contained 56 grams CO2, 3.04 mol CO and 9.03 X 1023 atoms of argon, the partial pressure of argon would be about
Calculate the initial velocity of a reaction in terms of Vmax if the substrate concentration is 1/2 the Km (substitute and go).
You pass a road sign saying "New York 115 km." If you drive at a constant speed of 65 mi/h, how long should it take you to reach New York? (Round to the nearest minute.)
Determine the mass percentage concentration of a sodium hydroxide solution produced by mixing 50.0 mL of a 25 % (density=2.45g/mL) sodium hydroxide solution with 10.0mL of H 2 O?
A 4.08g sample of a compound contains 3.02g of oxygen. What is the empirical formula
The gas with an initial volume of 24.0 L at a pressure of 565 mmHg is compressed until the volume is 16.0 L. What is the final pressure of the gas, assuming the temperature does not change?
The heat capacity of the calorimeter was 15.7J/K. The final temperature in the calorimeter was 32.4 degree C. What is the specific heat capacity of the mineral?
Write out steps necessary to make ch3o=cch2ch3 starting with ethyne and any other chemicals
Use resonance forms to show the delocalization (over four carbon atoms) of the negative charge of the benzyl and anion
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