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1. A 0.10 M solution of the weak acid HA has a pH of 2.96. What is the percent dissociation of HA in this solution? What is Ka for HA?
2. An unknown acid is dissolved in water. The solution is divided into two equal parts and one part is titrated to a phenolphthalein end point with NaOH solution. The two solutions are then mixed and the resulting pH is found to be 3.25. What is the Ka of the unknown acid?
sodium benzoate c6h5coona is used as a food preservative. calculate the ph of a 0.050 m solution of this salt. ka for
In a second 50.00mL aliquot, the ClO4- was reduced to Cl- with V2(SO4)3. Titration of the reduced sample required 40.12mL of the AgNO3 solution. Calculate the %KCl and %KClO4 in the sample
At what temperature is the change in entropy for the reaction equal to the change in entropy for the surroundings?
What determines whether 2-bromobutane undergoes an SN1 or an SN2 reaction? How would you favor SN2 formation
chloride contain 75.27% ag calculatr the mass of silver chloride requiered to plate 215 mg of pure silver
calculate the molarity of a solution of glycerol made by dissolving 69.000 ml glycerol at 15 degrees c in enough water
waters heat of fusion is 80. and its specific heat is 1.0. some velomobile seats have been designed to hold ice packs
Consider the Lewis Resonance structure for the chlorite ion. How many total structures can be drawn, and how many of those structures obey the octet rule?
"A mixture of CH4 and H2O is passed over a nickel catalyst at 100 degrees K. The emerging gas is collected in a 5.00-L flask is found to contain 8.62g of CO, 2.60 g of h2, 43.0 g of CH4, and 48.4 g of H2O.
How many mmoles of ammonia would have to be added to 300. mL of 0.10 M cupric sulfate in order to reduce the Cu2+ concentration to 1.0 x 10-8 ? Kf for [Cu(NH3)4]2+ = 5.0 x 1012 Assume no change in volume.
Draw the structure of all alkenyl side products that could be formed by dehyradation of 2-methyl-2-butanol by and E1 mechanism. propose a mechanism for the formation of the alkene side products.
In the following experiment, a coffee-cup calorimeter containing 100. of is used. The initial temperature of the calorimeter is 23.0 . If 6.80 of is added to the calorimeter, what will be the final temperature of the solution in the calorimeter
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