Three reactions involving H2PO–
4 are given below:
(i) H3PO4 + H2O → H3O+ + H2PO–
4
(ii) H2PO–
4 + H2O → HPO2–
4 + H3O+
(iii) H2PO–
4 + OH– → H3PO4 + O2+
In which of the above does H2PO–
4 act as an acid?
|
Solubility product of silver bromide is 5.0 × 10–13. The quantity of potassium bromide (molar mass taken as 120 g mol–1) to be added to 1 litre of 0.05 M solution of silver nitrate to start the precipitation of AgBr is |
Answer |
|
One dm3 solution containing 10–5 moles each of Cl– ions and CrO4–2 ions is treated with 10–4 mole of silver nitrate. Which one of the following observations is made? [KSP of Ag2CrO4 = 4 × 10–12] [KSP of AgCl = 1 × 10–10] |
Answer |
|
The first and second dissociation constants of an acid H2A are 1.0 × 10–5 and 5.0 × 10–10 respectively.The overall dissociation constant of the acid will be |
Answer |
|
pH value of which one of the following is NOT equal to one? |
Answer |
|
Hydroxyl ion concentration of 1M HCl is |
Answer |
|
Solid Ba(NO3)2 is gradually dissolved in a 1.0 × 10–4 M Na2CO3 solution. At what concentration of Ba2+ will a precipitate begin to form? (Ksp for BaCO3 = 5.1 × 10–9) |
Answer |
|
If, in the reaction N2O4 ⇌ 2NO2, $x$ is that part of N2O4 which dissociates, then the number of molecules at equilibrium will be |
Answer |
|
The solubility of Ca3(PO4)2 in water is y moles/litre. Its solubility product is |
Answer |
|
Consider the following gaseous equilibria with equilibrium constants K1 and K2 respectively. SO2(g) + $\dfrac{1}{2}$O2(g) ⇌ SO3(g) 2SO3(g) ⇌ 2SO2(g) + O2(g) The equilibrium constants are related as ______. |
Answer |
|
Three reactions involving H2PO– (i) H3PO4 + H2O → H3O+ + H2PO– (ii) H2PO– (iii) H2PO– In which of the above does H2PO– |
Answer |