In qualitative analysis, the metals of Group I can be separated from other ions by precipitating them as chloride salts. A solution initially contains Ag+ and Pb2+ at a concentration of 0.10 M. Aqueous HCl is added to this solution until the Cl– concentration is 0.10 M. What will the concentration of Ag+ and Pb2+ at equilibrium?
(Ksp for AgCl = 1.8 × 10-10)
(Ksp for PbCl2 = 1.7 × 10-5)
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The reaction-
begins with the concentrations of A and B both at an initial value of 1.00 M. When equilibrium is reached, the concentration of D is measured and found to be 0.25 M. The value for the equilibrium constant for this reaction is given by the expression:
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Consider the following reaction:
A2(g) + B2(g) ⇋ 2AB(g)
At equilibrium, the concentrations of A2 = 3.0×10–3 M; B2 = 4.2×10–3 M and AB = 2.8×10–3M.
The value \(K_C\) for the above-given reaction in a sealed container at 527°C is:
1. | 3.9 | 2. | 0.6 |
3. | 4.5 | 4. | 2.0 |
Given that the equilibrium constant for the reaction
has a value of 278 at a particular temperature, the value of the equilibrium constant for the following reaction at the same temperature will be:
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1. | 7.00 | 2. | 7.87 |
3. | 5.13 | 4. | 6.13 |
The hydrogen ion concentration of a 10-8 M HCl aqueous solution at 298 K (Kw = 10-14) is:
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The following pair constitutes a buffer is:
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