Posted by paul on Saturday, November 26, 2011 at 5:46pm.
Choices: True,False. Select all that are True.
The pH at the equivalence point of a weak base with a strong acid is expected to be less than 7 because of the presentce of the conjugated acid in the water.
One cannot prepare a buffer from a strong acid and its conjugated base, because a conjugated base of a strong acid cannot buffer; meaning cannot react in the reverse direction of the acid dissociation.
The capacity of a buffer solution made out of 0.20mol/L hydrofluoric acid and 0.30mol/L sodium fluoride is the higher than that of a buffer solution made out of 0.10mol/L of hydrofluoric acid and 0.15mol/L of sodiumfluoride. But the pH of the two buffers solutions is the same.
A solution that is made out of 1.00mol/L ammonia and 0.50mol/L of ammonium chloride is a basic buffer.
You cannot prepare a buffer with a pH of 11.5 with trimethylamine and trimethylammonium chloride
You cannot prepare a buffer from nitric acid and sodium nitrate, but you can make one from nitrous acid and potassium nitrite
A solution that is made out of 1.00mol/L ammonia and 0.05mol/L of ammonium chloide can act as a basic buffer.
The pH at the equivalence point of a weak base with a strong acid is expected to be less than 7 because the acid that is added is very strong
The pH of a buffer solution made out of 0.20mol/L hydrofluoric acid and 0.30mol/L sodiumfluoride is the same as a buffer solution that is made out of 0.10mol/L of acetic acid and 0.15mol/L of sodium acetate.
- chemistry - DrBob222, Saturday, November 26, 2011 at 6:50pm
Too little work shown on your part. Which parts do you not understand and where are you getting stuck?
- chemistry - Kay, Wednesday, November 30, 2011 at 7:09pm
i think its true, true, true, true, false, true, false, false, true.. but its not right
- chemistry - joseph, Thursday, January 12, 2012 at 12:07am
false
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