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1) Explain the difference between equivalence point and end point... Explain how the pH at the equivalence point varies as the strength of the acid increases.... Remember that acid strength depends upon Ka not upon analytical concentration. Your answer should be based upon the proton transfer reaction that is important at the equivalence point.
2) Explain the difference in change of pH with volume of titrant added near the equivalence point as compared to a point earlier in the titration. (i.e. How does the slope of the titration curve differ?)
3) why the initial pH is not the same for all the acids while it is nearly the same when the titration has been carried a few mL past the equivalence point. Your answer should include appropriate proton transfer NIE(s).
4) What is the difference in change of pH with volume of titrant added near the equivalence point as compared to a point earlier in the titration. (i.e. How does the slope of the titration curve differ?)
A mixture of gases containing 21.0 g of N2, 106.5 g of Cl2, and 12.0 g of He at 14 oC is in a 50.0 L container. What is the partial pressure of N2.
In any chemical reaction, the quantities that are preserved are what?
It takes 47.0 to raise the temperature of an 10.6 piece of unknown metal from 13.0 to 24.7. What is the specific heat for the metal?
Concentrated HCl is 36.5% HCl by mass and has a density of 1.18 g/mL.What is the molality?What is the molarity?
The volume of a drop of rain was found to be 0.448 ml at N.T.P. How many molecules of water and number of atoms of hydrogen are present in this drop.
Drawa a fat (oil) molecule representing corn oil. The fatty side chains that you need to include are two of the esters group derived from oleic acid and one from the linoleic acid
The equilibrium constant, Kc, for the following reaction is 7.00E-5 at 673 k. Calculate Kp for this reaction at this temperature.
How many moles of oxygen are consumed in burning 1.60 moles of benzene, C6H6?
ammonia solution required 10.83 mL of 0.9760 M HCl to reach endpoint, whats the concentration of the ammonia solution?
A gas occupying 28mL at standard conditions is heated to 18C while the pressure is reduced to 0.98221 atm. What is the new volume occupied by the gas? Answer in units of mL.
Calculate the heat released when 1.95 L of Cl2(g) with a density of 1.88 g/L reacts with an excess of sodium metal at 25°C and 1 atm to form sodium chloride.
If the rate constant at 20 degrees CELSIUS IS 4.3(10^-5). How long would it take for 83% of the compound to decompose ? if the rate constant is 9.0(10^-4) at 55 degrees Celsius what will the activation energy be?
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