Solubility of 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 has highest pH ?
CH3COOK
Na2CO3
NH4Cl
NaNO3
Ionisation constant of CH3COOH is 1.7×10-5 and concentration of H+ ions is 3.4×10-4. Then, find out initial concentration of CH3COOH molecules.
3.4 × 10-4
3.4 × 10-3
6.8 × 10-4
6.8 × 10-3
The rapid change of pH near the stoichiometric point of an acid base titration is the basis of indicator detection. pH of the solution is related to ratio of the concentrations of the conjugate acid (HIn) and base (In-) forms of the indicator given by the expression
log [In-] / [HIn] = pKIn-pH
log [HIn] / [In-] = pKIn-pH
log [HIn] / [In-] = pH-pKIn
log [In-] / [HIn] = pH -pKIn
Calculate the pOH of a solution at 250C that contains 1.0×10-6 M of hydronium ions .
7.00
4.00
9.00
1.00
The solubility product of AgI at 250C is 1.0 ×10-16 mol2L-2.The solubility of AgI in 10-4 N solution of KI at 250C is approximately (in mol L-1)
1.0 ×10-10
1.0 ×10-8
1.0 ×10-16
1.0 ×10-12
The ionisation constant of ammonium hydroxide is 1.77×10-5 at 298 k. Hydrolysis constant of ammonium chloride is _______ .
5.65×10-10
6.50×10-12
5.65×10-13
5.65×10-12
The conjugate acid of NH2- is ______ .
N2H4
NH4 +
NH2 OH
NH3
Solubility of a M2S type salt is 3.5 ×10-6, then find out its solubility product
1.7 ×10-6
1.7×10-16
1.7 ×10-18
1.7 ×10-12
Which of the following molecules acts as a Lewis acid ?
(CH3)3B
(CH3)2O
(CH3)3P
(CH3)3N
