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WorksheetsAcid base buffer
Total questions: 20
Worksheet time: 8mins
NH3 is:
a Bronsted Lowry base
an Arrhenius base
an acid
both an Arrhenius and a Bronsted Lowry base
a compound that increase H3O+ concentration in water and making the solution more acidic is called______.
Arrhenius acid
Arrhenius base
Bronsted Lowry acid
Bronsted Lowry base
An acid has a pH
higher than 7
lower than 7
7
greater than 14
Zn(OH)2 is an example of a...
acid
base
salt
water
Four substances were tested for pH, lemon juice (pH 2), baking soda (pH 9), bleach (pH 12), and milk (pH 6). Which of the following correctly lists the substances from most basic to acidic?
lemon juice, milk, baking soda, bleach
bleach, baking soda, milk, lemon juice
milk, lemon juice, baking soda, bleach
baking soda, bleach, lemon juice, milk
NH3+H2O⟺NH4++OH−
The equilibrium constant for the above equation is_______.
Ka
Kb
Kc
Kw
HNO3 + H2O → H3O+ + NO31-
NO31- is the conjugate base of
H2O
HNO3
H3O+
none of the above
What is the conjugate base of H2SO4?
SO42-
H2SO3
HSO31-
HSO41-
Which of the following is a conjugate acid/base pair?
HCl/OCl-
H2SO4/SO42-
HPO42-/PO43-
H3O+/OH-
The pH of a solution at 25ₒC in which [OH-] = 3.9 x 10-5M is:
4.41
3.90
9.59
4.80
Phenol, C6H5OH, has a Ka =1.0 x 10-10. What is the pH of a 0.010 M solution of phenol?
between 3-7
10
2
between 7-10
7
What is the [OH-] if the pH is 4.9?
7.94 x 10-10 M
1.0 x 10-4 M
7.94 x 10-14 M
4.9 x 10-10 M
What is the [OH-] if the [H+] is
1.0 x 10-3 M?
1.0 x 10-3 M
6.02 x 10-23 M
1.0 x 10-14 M
1.0 x 10-11 M
The buffer solution is able to maintain pH by some events, except . . .
The addition of a little acid
The addition of a little base
Addition of water
The addition of excess acid
The pH solution that consists of HA 0.01 M and A- 0.01 M with Ka = 1.0x10-5 is__________.
4
5
6
8
a buffer solution is made by mixing HA, a weak acid, with salts containing A- ions.
HA ↔ H+ + A-
a formula that can be used for the calculation of the pH of this buffer solution is
