Assignment for Chapter 10
Name:
1. Define acid and base according to Arrhenius and bronsted – Lowery Theory.
2. A. For each of the following acid and base, tell whether they are strong or weak?
HCl:
H2SO4:
HNO3:
H3PO4:
NaOH:
KOH:
Ammonia:
CH3COOH:
Ca (OH) 2:
B. Write the formula of conjugate acid base pair for the following.
Acid Base
+
H3O _____
HCl ______
-
HSO4 _______
2-
____ CO3
_____ NH3
-
_____ OH
3. A. How is Ka defined? Write the equation for ka for generalizes acid HA.
B. How is Kw defined? What is numerical value at 25 C ?
4. A. How is pH defined?
pH for acidic solution =
pH for basic solution:
pH for neutral solution:
B. A common buffer solution is prepared from __________
Write Henderson – Hasselbalch equation for buffer solution.
c. How you determine of pH in laboratory?
5. Calculate pH of a 1.0 X 10^-9M solution of HCl.
6. Calculate the H3O of a solution of HCl with pH = 7.00
7. The OH of an aqueous solution is 1.0 X 10 ^-4M. What is its H3O?
8. Calculate H3O and OH of a NaOH with pH = 6.0
9. Calculate the pH of water that has H3O = 3.5 X 10^-5M.
10. The measure pH of water is 5.40. Calculate H3O.
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