0.1 M solution of which one of these substances will be basic ?
Sodium borate
Calcium nitrate
NH4Cl
Sodium sulphate
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
The values of Kp1 and Kp2 for the reactions and are in ratio of 9:1.If degree of dissociation of x and A be equal, then total pressure at equilibrium (i) and (ii) are in the ratio .
3:1
1:9
36:1
1:1
At 250C, the dissociation constant of a base, BOH is 1.0 ×10-12. The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be
2.0 ×10-6 mol L-1
1.0 ×10-5 mol L-1
1.0 ×10-6 mol L-1
1.0 ×10-7 mol L-1
The solubility product of CuS ,CdS and HgS are 10-31 , 10-44 , 10-54 , respectively.The solubility of these sulphides are in the order .
CdS > HgS > CuS
HgS > CdS > CuS
CdS > CuS > HgS
CuS > CdS >HgS
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 hydrogen ion concentration of a 10-8 M HCl aqueous solution at 298k (kw = 10-14 ) is
1.0×10-6 M
1.0525×10-7 M
9.525×10-8 M
1.0×10-8 M
A Physician wishes to prepare a buffer solution at pH =3.58 that efficiently resist changes in pH yet contains only small concentration of the buffering agents. Which one of the following weak acid together with its sodium salt would be best to use ?
m-chlorobenzoic acid (pKa=3.98)
P-Chlorocinnamic acid(pKa = 4.41)
2,5 -dihydroxy benzoic acid (pKa=2.97)
Acetoacetic acid(pKa=3.58)
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)
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
