the enthalpies of neutralisation of a weak acid HA and a weak acid HB by NaOH are -6900 cal/equivalent and -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. in what ratio is the ratio is the base distributed between HB and HA?

The enthalpies of neutralization of a weak acid HA and a weak acid HB by NaOH are
6900 cal/equivalent and 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. In what ratio is the base distributed between
HB and HA ?
 
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