The strongest conjugate base is
CI-
CH3COO-
Aqueous solution of acetic acid contains
CH3COO- and H+
CH3COO- , H3 O+ and CH3COOH
CH3COO-, H3O+ and H+
CH3COOH, CH3COO- and H+
A weak acid, HA, has a Ka of 1.00 × 10-5 . If 0.100 mole of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to
99.0%
1.00 %
99.9 %
0.100 %
Which of the following is most soluble ?
Bi2S3 (Ksp = 1 × 10-70 )
MnS (Ksp = 7 × 10-16 )
CuS (Ksp = 8 × 10-37 )
Ag2S (Ksp = 6 × 10-51 )
What is the correct relationship between the pHs of isomolar solutions of sodium oxide (pH1 ), sodium sulphide (pH2 ), sodium selenide (pH3) and sodium telluride (pH4) ?
pH1 > pH2 pH3 > pH4
pH1 < pH2 < pH3 < pH4
pH1 < pH2 < pH3 pH4
pH1 > pH2 > pH3 > pH4
Equal volumes of three acid solutions of pH 3,4 and 5 are mixed in a vessel. What will be the H+ ion concentration in the mixture ?
1.11 × 10-4 M
3.7 × 10-4 M
3.7 × 10-3 M
1.11 × 10-3 M
The solubility of a saturated solution of calcium fluoride is 2 × 10-4 mol/L. Its solubility product is
12 × 10-2
14 × 10-4
22 × 10-11
32 × 10-12
Solubility of a MX2 type electrolytes is 0.5 × 10-4 mol/L, then find out Ksp of electrolytes.
5 × 10-12
25 × 10-10
1 × 10-13
5 × 10-13
Which of the following pairs constitutes a buffer ?
HNO2 and NaNO2
NaOH and NaCI
HNO3 and NH4NO3
HCI and KCI
Which one of the following is true for any diprotic acid, H2 X ?
