The enthalpy of neutralization of four acids HA, HB ,HC and HD with NaOH are -13, -12, -11 ,-10 kcal/ mol. Which salt has maximum degree of hydrolysis ?
The enthalpies of neutralization of a weak acid HA and a weak acid HB by NaOH are -6900 cal/equivalent at -2900 cal/equivalent, respectively. When one equivalent of NaOH is added to a solution containing one equivalent of HA and one equivalent of HB, the enthalpy change was -3900 cal. The ratio in which the base distributed between HB and HA is x/y then x + y is
The enthalpy of neutralization of weak monoprotic acid, HA in 1M solution with a strong base is -55.95 KJ/mol if the unionised acid requires 1.4 KJ/mol heat for its complete ionization and enthalpy of neutralisation of the strong monobasic acid with a strong monoacidic base is = -57.3 KJ/mol. What will be % ionization of weak acid in molar solution is
The percentage degree of hydrolysis of a salt of weak acid (HA) and weak base (BOH) in its 0.1 M solutions is found to be 10% If the molarity of the solution is 0.05M , the percentage hydrolysis of the salt should be :
A weak acid HX has the dissociation constant 1xx 10 ^(-5) M.It forms a salt NaX on reactions with alkali. The percentage hydrolysis of 0.1 M solution of NaX is :
Acic base + Redox titration 1^(st) titration : M/10 reacts with oxalic acid as well as H_(2)SO_4 according to equation H_(2)C_(2)O_4 + NaOH rarrNa_(2)C_(2)O_4 + H_(2)O, H_(2)SO_(4) + NaOH rarr Na_(2)SO_(4) + H_(2)O 2^(nd) titration : The mixture solution is titrated with M/10KMnO_4 solution which will reacts with oxalic acid (redox titration) in the presence of H_(2)SO_(4) H_(2)C_(2)O_(4) + underset(("Purple"))(KMnO_4)+H_(2)SO_(4) rarr K_(2)SO_(4) +underset(("Colourless"))( MnSO_4)+H_2O+CO_2 The reactionof oxalic acid with KMnO_4 is very slow therefore the oxalic acid solution is heated to 60-70^@C initially. Once the reation has started, its rate automatically increases. MnO_4^(-) acts as an oxidising agent. MnO_(4)^(-)overset(H^(+))rarrunderset("colourless")(Mn^(++),MnO_(4)^(--) ,MnO_(4) underset(H_2O)rarroverset("Brown ppt")(MnO_2) In the permanganate titration, the solution of reductant is always made acidic by adding H_2SO_4 rather than HCl or HNO_3 because
NARENDRA AWASTHI-IONIC EEQUILIBRIUM-Assertin-Reason Type Questions
