Which of the following molecules acts as a Lewis acid ?
(CH3)3B
(CH3)2O
(CH3)3P
(CH3)3N
The compound whose aqueous solution has the highest pH is
NaCl
NaHCO3
Na2CO3
NH4 Cl
The strongest conjugate base is
NO3-
Cl-
SO4 2-
CH3COO-
Which one of the following is true for any diprotic acid H2X?
Ka2=Ka1
Ka2>Ka1
Ka2< Ka1
Ka2= 1 / Ka1
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
What is the [OH-] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)2?
0.10 MNumber of milliequivalents of HCl =20×0.050×1=1Number of milliequivalents of Ba(OH)2 = 2×30×0.10=6[OH-] of final solution = milliequivalents of Ba(OH)2 - milliequivalents of HCl / Total volume = 6 - 1 / 50=0.1 M
0.40 M
0.0050 M
0.12 M
0.1 M solution of which one of these substances will be basic ?
Sodium borate
Calcium nitrate
NH4Cl
Sodium sulphate
Which has highest pH ?
CH3COOK
NaNO3
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
Solution of 0.1 N NH4OH and 0.1 N NH4Cl has pH 9.25, then find out pKb of NH4OH
9.25
4.75
3.75
8.25
