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Given that the data for neutralization o...

Given that the data for neutralization of a weak acid (HA) and strong acid with a strong base is:
`HA +OH^(-) rArr A^(-) + H_(2)O: DeltaH = -41.80kJ , H^(+) + OH^(-) rArr H_(2)O, Delta H= -55.90kJ`
The enthalpy of dissociation of weak acid would be

A

Phenolphthalein (8,3-10.0)

B

Methyl orange (3,1-4.4)

C

Methyl red ( 4,2-6,3)

D

Litmus (4.5 -8.3)

Text Solution

Verified by Experts

The correct Answer is:
A
Weak acid Vs strong base
` rArr ` pH at neutralization ` gt 7`
` therefore ` phenolphthalein
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Knowledge Check

  • Given that C + O_2 rarr CO_(2) , DeltaH^@ = -xkJ 2CO + O_2 rarr 2CO_2 , DeltaH^@ = -y kJ The enthalpy of formation of carbon monoxide will be

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