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This quiz is based on AP Chemistry Enduring understanding: "Chemical equilibrium plays an important role in acid-base chemistry and in solubility." In particular it focuses on pH calculations, titrations, buffers, and solubility calculation problems.
A solution has a hydroxide concentration of 2.0 x 10^-5. What is the pH of the solution?
1.5
9.3
7.3
13.0
Which pair of 1.0M solutions would have nearly the same concentration of hydronium ions?
HCl and HNO2
HF and HBr
HCl and HBr
HCl and HF
The diagram shows a titration curve of a weak acid with a strong base. What is the pKa of the weak acid?
0
2
3
7
A 0.1 mol/L solution of formic acid (40 mL) is titrated with 0.20 mol sodium hydroxide (10 mL). What is the pH of the resulting solution? The pKa of formic acid is 3.77.
3.77
3.90
7
10.23
A chemist is working with a liquid substance that tastes bitter, feels slippery, and conducts an electric current. Which of the following is the chemist most likely working with?
A salt
A base
An acid
Distilled water
Complete the sentence.
A substance that is more basic has a _____ pH than a substance that is acidic.
Same
Lower
Higher
None of these
A pH of 3 is how many times more acidic than a pH of 5?
5
100
1000
Can’t say
What is the pH of 25 mL of a 0.1M FCH2COOH (fluoroacetic acid) solution titrated to its equivalence point with 25 mL of a 0.1M NaOH? pKa of fluoroacetic acid=2.60
6.98
7.65
10.87
11.40
