18 Questions
At the equivalence point of a weak base/strong acid titration, what is the pH of the solution?
9.26
What is the pOH at the halfway point of a weak base/strong acid titration?
4.74
In a weak acid/strong base titration, what is the pH at the equivalence point?
7.00
What happens to the pH of a weak acid solution when NH4+ ions are added?
pH decreases
In a weak base/strong acid titration, what is the concentration of NH3 at the equivalence point?
0 mol/L
At the halfway point of a weak acid/strong base titration, what is the pOH of the solution?
4.74
What is the equilibrium concentration of NH4+ in the given reaction?
8.5×10^-4 M
What is the pOH of the solution?
3.07
What is the pH of a 0.020-M solution of NH3 at 25°C?
-10.93
What common error do students often make in Kb problems?
Mistaking x for hydronium ion concentration instead of hydroxide ion concentration
What does it mean for a solution to have a basic pH?
The pH is greater than 7
What factor influences solubility in complex ion formation?
pH
What is the pH at the equivalence point of a weak base/strong acid titration involving 25.00 mL of 0.100 M NH3 solution?
1.78
If the concentration of NH4Cl formed after adding 35.00 mL of 0.100 M HCl at the equivalence point is 1.00×10^(-3) mol, what is the initial concentration of NH3 in the flask?
0.125 M
In a weak acid/strong base titration, what is the pH after the equivalence point if it was 12.22 before the equivalence point?
7.00
How do you determine that you are past the equivalence point in a titration involving a weak base and a strong acid?
Mol of strong acid > Mol of weak base
What is the effect of adding 35.00 mL of 0.100 M HCl after the equivalence point in a weak base/strong acid titration?
[H+] decreases significantly
Which pH value represents the equivalence point in a titration involving a weak acid and a strong base?
8.72
Learn about determining the position in a titration process, specifically at the ½ equivalence point. Understand the calculations for molars of strong and weak substances before and after the point. Explore the concept of a perfect buffer solution in the context of NH3 and HCl.
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