Name___________________
Period___________________
Chemistry Quiz
II. Matching
_______1) Red in litmus
_______2) [OH-] > [H+]
_______3) pOH = 6.3
_______4) NaNO3(aq)
_______5) KC2H3O2 (aq)
_______6) pH = 5.2
_______7) pink in phenolphthalein
_______8) vinegar
_______9) tastes sour
_______10) [OH-] = [H+]
_______11) [H+] = 3.4 X 10-9
_______12) NH4Cl(aq)
a) acid
b) base
c) neutral
III. For each of the following reactions label the acid (a), the base (b), the conjugate acid (ca), and the conjugate
base (cb).
OH_______
1)
H2CO3
_______
+
2)
CH3NH2
______
+ H2O
_____
3)
HBr
+
______
H2O
______
HCO3 _______
CH3NH3+ +
_____
H3O +
______
+
H2O
_______
OH_____
+
Br______
IV. Problems. You must show your work for credit.
1) Given [OH-] = 1.5 x 10 –5, find [H+] , pH , pOH and tell if it is acidic or basic.
[H +] =
pH =
pOH =
acidic or basic
2) Given pH = 5.7, find [OH-] , pOH , [H+] and tell if it is acidic or basic
[OH -] =
pOH =
[H+] =
acidic or basic
3) Find the pH of a 0. 0045 M solution of NaOH.
3)
4) The pH of a 0.063 M solution of hypobromous acid (HBrO) is 4.95. Calculate Ka.
4)
5) How many mL of a 0.34 M of HCl are needed to neutralize 125 mL of a 0.11 M Ba(OH)2 ?
5)
6) What is the molar concentration of15 ml H3PO4 if it takes 25 mL of 0.85 M NaOH to neutralize the acid ?
6)
7 How many equilivants are in 6.34 L of a 0.75N solution of H3PO4
7)
8a) ________ Mg(OH)2
+ ________ HBr
8b) ________ Al(OH)3
+ ______ H2CO3
9 If 25.00 mL of citric acid solution is titrated with 28.12 mL of 0.1718 N KOH, what is the concentration of
citric acid? (hint: normality is a concentration unit!)
10)