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The heats of neutralisation of four acid...

The heats of neutralisation of four acids `a`, `b`, `c` and `d` when neutralised against a common base are `13.7`, `9.4`, `11.2` and `12.4` kcal respectively. The weakest among these acids is

A

p

B

q

C

r

D

s

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The correct Answer is:
B
For weakest acid heat of neutralisation is least.
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The heats of neutralisation of four acids A,B,C and D are -13.7,-9.4,-11.2 and -12.4kcal respectively, when they are neturalised by a common base. The acidic character obeys the order :

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The enthalpies of neutralisation of a string acid HA and a weaker acid HB by NaOH are -13.7 and -12.7 kcal Eq^(-1) , respectively. When one equivalent of NaOH is added to a mixture containing one equivalent of HA and HB , the enthalpy change was -13.5kcal . In what ratio is the base distributed between HA and HB ?

A solubility contains one mole each of HA and HB (both are weak acids) in one litre solution. Now 1 mole of NaOH is added to this solution so that both the acids are partly neutralised. Heat of neutralisation for HA and HB are- 11.8 and- 12.4 kcal respectively and the heat produced during partial neutralisation of HA and HB is- 12.25 kcal. Mole ratio of neutralisation of HA and HB is:

A solubility contains one mole each of HA and HB (both are weak acids) in one litre solution. Now 1 mole of NaOH is added to this solution so that both the acids are partly neutralised. Heat of neutralisation for HA and HB are- 11.8 and- 12.4 kcal respectively and the heat produced during partial neutralisation of HA and HB is- 12.25 kcal. pH of solution, if hydrolysis constant for A^(-) is 10^(-9) :

A solubility contains one mole each of HA and HB (both are weak acids) in one litre solution. Now 1 mole of NaOH is added to this solution so that both the acids are partly neutralised. Heat of neutralisation for HA and HB are- 11.8 and- 12.4 kcal respectively and the heat produced during partial neutralisation of HA and HB is- 12.25 kcal. The ratio of dissociation constant of two acids are:

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