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The enthalpy of neutralisation of four a...

The enthalpy of neutralisation of four acids HA,HB,HC and HD witgh NaOH are 13,-12,-11,-10 Kcal//mol. Which salt has maximum degree of hydrolysis?

A

1 M NaA

B

1 M NaB

C

1 M NaC

D

1 M NaD

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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 ?

The enthalpies of neutralization of a weak acid HA & a weak acid HB by NaOH are -6900 Cal/equivalent & -2900 Cal/equivalent repsectively. When one equivalent of NaOH is added to a solution containing one equivalent of HB, the enthalpy change was -3900 Calories. In what ratio is the base distribute between HA & HB ?

Knowledge Check

  • The enthalpies of neutralization to two weak acids HA and HB with NaOH are -10.1 and -11.8 Kcal//g . eq respectively. Which of the following relation is correct regarding acidic strengths of HA and HB :-

    A
    `HAgtHB`
    B
    `HAltHB`
    C
    `HA=HB`
    D
    Connot be predicted

  • 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 :

    A
    `AgtBgtCgtD`
    B
    `AgtDgtCgtB`
    C
    `DgtCgtBgtA`
    D
    `DgtBgtCgtA`

  • The heats of neutralization of four acids A,B,C,D are -13.7,-9.4,-11.2 and -12.4 kcal respectively when they are neutralized by common base. The acidic character obeys the order.

    A
    `A gt B gt C gt D`
    B
    `A gt D gt C gt B`
    C
    `D gt C gt B gt A`
    D
    `D gt B gt C gt A`

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    Statement-I : The enthalpy of neutralization of the reaction between HCl and NaOH is -13.7 kCal/mol. If the enthalpy of neutralization of oxalic acid (H_(2)C_(2)O_(4)) by a strong base is -25.4 kCal/mol, then the enthalpy change (|Delta_(r)H|) of the process H_(2)C_(2)O_(4) rarr 2H^(+)+C_(2)O_(4)^(2-) is 11.7 kCal/mol. Statement-II : H_(2)C_(2)O_(4) is a weak acid.

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