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A buffer consists of 0.20 M KHCO3 and 0.44 M K2CO3. Carbonic acid is a diprotic acid with Ka1 = 4.5 multiplied by 10-7 and Ka2 = 4.7 multiplied by 10-11.
(a) Which Ka value is more important to this buffer?
Ka1 or Ka2
(b) What is the buffer pH?
Calculate the pH of a 0.60 M H2SO3, solution that has the stepwise dissociation constants Ka1=1.5x10^-2 and Ka2= 6.3x10^-8
an iron nail weighing 5.10 g is allowed to react with oxygen according to the reaction below.4fe 3o2 rarr 2fe2o3a
write mechanisms for the following reactions, which are used in chemical tests and derivative preparations: (a) the reaction of butanal with 2,4 dinitrophenylhydrazine reagent.
CaCO3(s)+2HCl(aq) -> CaCl2(aq) +H2O(l) +CO2(g) How many grams of calcium chloride will be produced when 27.0 g of calcium carbonate are combined with 12.0 g of hydrochloric acid. Which reactant is in excess and how many grams of this reactant will..
An empty aerosol can at 25 degree celcius still contains gas at 1.00 atmosphere pressure. If an empty can is thrown into a 488.2 degree celcius fire, what is is the final pressur in the heated can.
what effect does changing from room temperature to 37 have on the activity of the enzyme? 5 what does copper II sulfate to do the enzyme
They are all buffer solutions and would all have the same capacity 2) Of the following solutions, which has the greatest buffering capacity?
a) A solution of 1-iodohexane b) A solution of (S)-2-iodohexane c) A solution of 40% (S)-3-chlorohexane and 60% (R)-3-chlorohexane d) A solution of equal quantities of R and S 3-chlorohexane
What main type of intermolecular attraction would you expect for cl2c0?
A large pond is 300m by 95m with an average depth of 2.5m. Assuming that the pond is saturated with oxygen, calculate the amount of sugar (C12H22O11) in kg that would be sufficient to completely consume the dissolved oxygen.
Why must all F- solutions be measured and kept in plastic ware rather than glassware. Why do you measure the most dilute solutions first when using ISE. Why do we not use TISAB when determining the selectivity coefficient.
Calculate the mass defect of the fluorine nucleus19/9F . The mass of neutral is equal to 18.998403 atomic mass units. Calculate the binding energy Eb of the fluorine nucleus 19/9F . Calculate the binding energy per nucleon of the fluorine nucleus ..
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