The pKb of CNΘ is 4.7. The pH is solution prepared by mixing 2.5mol of 2.5mol of KCN of 2.5mol of HCN in water and making the total volume upto 500mL is
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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 ?
Which has the highest pH?
The Ksp of Ag2CrO4,AgCl,AgBr and AgI are respectively, 1.1×10−12,1.8×10−10,5.0×10−13,8.3×10−17. Which one of the following salts will precipitate last if AgNO3 solution is added to the solution containing equal moles of NaCl,NaBr,NaI and Na2CrO4 ?
Equal volume of solutions pH values 8,10,12 are mixed with each other, the pH of resultant solution is nearly
Which of the following molecules acts as a Lewis acid?
The solubility product of a sparingly soluble salt AX2 is 3.2×10−11. Its solubility (in mo/L) is
The conjugate acid of NΘH2 is
The solubility of a saturated solution of calcium fluoride is 2×10−4 mol/L. Its solubility product is