Name: _____________________________ Date: ________ Period: _____
Acid-Base Takehome Test
Answer the questions as best as you can. Remember there is partial credit
when you show work.
1. Compare and contrast the three different ways of explaining what an acid
and base are, Arrhenius, Bronsted-Lowery, and Lewis. Why do we favor
using one over the other? Determine if the following substances are acids
or bases as defined by each classification, HCl, NaOH, CH3COOH, BF3,
NH3
2. How do strong acids and bases differ from weak acids and bases? Does
strength have any connection to corrosiveness?
3. Balance the following reaction
_____ KOH (aq) + ______ H3PO4 (aq) -------> _______K3PO4(aq) + ______H2O(l)
a. Label the Acid, Base, Conjugate Acid, and Conjugate Base. What
type of reaction is occurring here? What type of “salt” (Acidic Basic
Neutral) is produced from the above reaction and why?
Name: _____________________________ Date: ________ Period: _____
4. A student spills 20 mL of 2.0 M Benzoic acid (aq). Will the student need
more than 20 ml of .75 M NaOH, less than 20 ml of .75 M NaOH (aq) or 20
ml of .75 M NaOH (aq) to neutralize the acid spilled? Give a reason for
your answer.
5. What is the scientific process in which we can determine the concentration
of an unknown substance? How can you determine the concentration of a
25.0 ml of a Hydrochloric acid solution given a supply of .75 M NaOH
(aq) and phenolphthalein? Please be specific as to the steps and process.
a. The base at .75 M is less concentrated than the 2.0 M
6.
Lemon juice have a concentration of hydronium ion ( H+ or H3O+ )
concentration of 5.01 x 10-3 M.
a) What is the pH of lemon juice? pH = -log (7.0 x 10-2 M.) = 1.15
b) What is the pOH of the lemon juice? 14 – 1.15 = 12.85
c) What is the OH- ion concentration of the lemon juice? 10-12.85 = 1.43
-13
M
d) Is lemon juice acidic or basic?
Name: _____________________________ Date: ________ Period: _____
7. 11. Household ammonia has a pH of 11.6.
a) What is the H3O+ ion concentration of the ammonia? 10-12.6 = 2.51
x10-13 M
b) What is the pOH of the ammonia? 14
– 12.6 = 1.4
c) What is the OH- ion concentration of the ammonia? 10-1.4= 3.98 x10 -2
M
d) Is the ammonia acidic or basic?
8. The main ingredient in Tums antacid tablets is calcium carbonate, CaCO3. A
single tablet contains 0.500 g CaCO3. What volume of 0.75 M HCl is required
to titrate a single tablet of Tums and be completely neutralized?