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In this experiment we reduced methylene blue with ascorbic acid using HCl as a catalyst. Given that the half reaction for the reduction of methylene blue is MB+(ox) +2H +2e ----->MBH2(red) (potential = 100 mV). Explain whether or not dissolved oxygen in the reactants has an affect on the reaction. Write all half reactions involved.
Why is it important to use a large excess of sodium borohydride when doing a reduction in aqueous ethanol. Consider what reaction might occur between water and sodium borohydride.
Determine the mass of precipitate (in grams) that forms when 213.8 mL of 0.132 M CaCl2 solution is reacted with excess AgNO3 solution.
Draw structures corresponding to each of the given names. Draw: 2-fluoro-3-methylpentane, 3-cyclobutylpentane
stationary phase thickness on the inner wall of 0.76 ?m passes unretained solute through in 65 s. A particular solute has a retention time of 403 s. What is the partition coefficient for this solute?
How many moles of water can be produced by 12.5 moles of C4H10 with excess oxygen?
What is the relationship between the standard cell potentials, E, for the following two galvanic cell reactions?
25 lbs of propane are held in a sealed container at 350 psia. The volume of the container is 3 ft3. Calculate the weight and volumes of the two phases in the container.
How many grams of NaF form when 0.580 mol of HF reacts with excess Na2SiO3?
A chemical firm was hired to monitor a nearby lake for possible mercury contamination. Several samples were taken at different locations around the lake, including water samples.
Octane has a vapor pressure of 40. torr at 45.1 degrees celcius and 400. torr at 104.0 degrees celcius. What is its heat of vaporization (R=8.214 J/K mol)
The density of ethanol is 0.7893 g/mL. Calculate the maximum work that could be obtained by burning 1.000 gallon of liquid ethanol
Write one overall equation, using an alkali metal ion and a nitrate ion as spectator ions if needed, for the following net ionic equation: H+(aq) + OH-(aq) ? H2O(l)
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