The pH of a solution made by mixing 50 mL of 0.01 M barium hydroxide solution with 50 mL of H2O is

1. 3.0 2. 6.0
3. 12.0 4. 15.0

Subtopic:  pH calculation |
 78%
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Find the molar solubility of Fe(OH)3 in a buffer solution that 0.10 M in NH4Cl and 0.10 M in NH3. If Kb (NH3)=1.8×10-5 and Ksp [Fe(OH)3]=2.6×10-39.

1. 4.458×10-25 M

2. 3.458×10-25 M

3. 2.229×10-24 M

4. 4.458×10-22 M

Subtopic:  Solubility Product |
 52%
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A base dissolved in water yields a solution with a hydroxyl ion concentration of 0.05 mol litre-1. The solution is

1. basic

2. acid

3. neutral

4. either 2 or 3

Subtopic:  Acids & Bases - Definitions & Classification |
 73%
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Ionization constant of CH3COOH is 1.7×10-5 and concentration of H+ ion is 3.4×10-4. Then initial concentration of CH3COOH is

1. 3.4×10-4

2. 3.4×10-3

3. 6.8×10-4

4. 6.8×10-3

Subtopic:  Ionisation Constant of Acid, Base & Salt |
 70%
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At 25°C the dissociation constant of a base, BOH is 1.0×10-12, the concentration of hydroxyl ions 0.01 M aqueous solution of the base would become

1. 2.0×10-6 mol L-1

2. 1.0×10-5 mol L-1

3. 1.0×10-6 mol L-1

4. 1.0×10-7 mol L-1

Subtopic:  Ionisation Constant of Acid, Base & Salt |
 68%
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The solubility product of AgI at 25°C is 1.0×10-16 mol2 L-2. The solubility of AgI in 10-4 N solution of KI at 25°C is :  (in mol L-1)

1. 1.0×10-10

2. 1.0×10-8

3. 1.0×10-16

4. 1.0×10-12

Subtopic:  Solubility Product |
 77%
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When 0.1 mole of CH3NH2 (ionization constant Kb=5×10-4) is mixed with 0.08 mol HCl and the volume is made up of 1 litre. The [H+] of resulting solution is -

(log 4 =  0.60)

1. 8×10-2

2. 2×10-11

3. 1.23×10-4

4. 8×10-11

Subtopic:  pH calculation |
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The solution with pH value close to 1.0 among the following is:

1. 100 ml of (M/10) HCl + 100 ml of (M/10) NaOH
2. 55 ml of (M/10) HCl + 45 ml of (M/10) NaOH
3. 10 ml of (M/10) HCl + 90 ml of (M/10) NaOH
4. 85 ml of (M/10) HCl + 15 ml of (M/10) NaOH

Subtopic:  pH calculation |
 59%
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If Ag++2NH3Ag(NH3)2+; K1=1.8×107

Ag++Cl-AgCl; K2=5.6×109

Then for

AgCl+2NH3[Ag(NH3)2]++Cl-,

Equilibrium constant will be

1. 0.32×10-2

2. 3.11×102

2. 10.08×1016

4. 1.00×10-17

Subtopic:  Kp, Kc & Factors Affecting them |
 80%
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There sparingly soluble saltrs A2X, AX and AX3 have the same solubility product.Their solubilities will be in the order

1. AX3>AX>A2X

2. AX3 < A2X>AX

3. AX>AX3>A2X

4. AX>A2X>AX3

Subtopic:  Solubility Product |
 57%
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