Multiple Choice QuestionsWhat is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?
12.65
2.0
7.0
7.0
Which one of the following pairs of the solution is not an acidic buffer?
HClO4 and NaClO4
CH3COOH and CH3COONa
H2CO3 and Na2PO4
H2CO3 and Na2PO4
A.
HClO4 and NaClO4
A buffer solution is one which resists changes in pH when small quantities of an acid or an alkali are added to it.
HClO4 and NaClO4 are not an acidic buffer because strong acid with its salt cannot form buffer solution.An aqueous solution of which of the following compounds is the best conductor of electric current?
Acetic acid C2H4O2
Hydrochloric acid, HCl
Ammonia, NH3
Ammonia, NH3
If pH ofa saturated solution of Ba(OH)2 is 12, the value of its Ksp is
4.00 x 10-6 M3
4.00 x 10-7 M3
5.00 x 10-6 M3
5.00 x 10-6 M3
What is [H+] in mol/L of a solution that is 0.20 M in CH3COONa and 0.10 M in CH3COOH?
(Ka for CH3COOH = 1.8 x 10-5 )
3.5 x 10-4
1.1 x 10-5
1.8 x 10-5
1.8 x 10-5
In which of the following equilibrium Kc and Kp are not equal?
2NO (g) ⇌ N2 (g) + O2 (g)
SO2 (g) + NO2 (g) ⇌ SO3 (g) + NO (g)
H2 (g) + I2 (g) ⇌ 2 HI (g)
H2 (g) + I2 (g) ⇌ 2 HI (g)
In a buffer solution containing an equal concentration of B- and HB, the Kb for B- is 10-10.The pH of buffer solution is
10
7
6
6
The reaction,
2A (g) + B (g) ⇌ 3C (g) + D (g)
is begun with the concentrations of A and B both at an initial value of 1.00 M. When equilibrium is reached, the concentration of D is measured and found to be 0.25 M. The value for the equilibrium constant for this reaction is given by the expression
[(0.75)3 (0.25)] / [(1.00)2 (1.00)]
[(0.75)3 (0.25) ] / [(0.50)2(0.75)]
[(0.75)3(0.25)] / [(0.50)2(0.75)]
[(0.75)3(0.25)] / [(0.50)2(0.75)]
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