why is the concentration of h3po4 solution 0.67 M and that of hcl 2.00 M? - calc
ID: 1014382 • Letter: W
Question
why is the concentration of h3po4 solution 0.67 M and that of hcl 2.00 M?- calculate the theoretical standard molar enthalpies for the neutralization reaction using the standard molar enthalpies of formation ( write net ionic equation first, then search for standard molar enthalpies of formation in thermodynamic data table). why is the concentration of h3po4 solution 0.67 M and that of hcl 2.00 M?
- calculate the theoretical standard molar enthalpies for the neutralization reaction using the standard molar enthalpies of formation ( write net ionic equation first, then search for standard molar enthalpies of formation in thermodynamic data table).
- calculate the theoretical standard molar enthalpies for the neutralization reaction using the standard molar enthalpies of formation ( write net ionic equation first, then search for standard molar enthalpies of formation in thermodynamic data table).
Explanation / Answer
the concentration of H+ ions in 0.67 M H3PO4 solution is equivalent to 2 M HCl solution because 1 mol of H3PO4 gives 3 mols of H+ ion and 1 mol of HCl gives 1 mol of H+ ion, hence 0.67 mol H3PO4 will give 3*0.67 = 2 mol H+ which is equal to H ion from 2 mol HCl.
Theoritical heat of neutralisation is equal to heat of formation of water beacause 1 eq of acid and base gets neutralized then formation of ! mol water takes place
Heat of neutralisation = 13.7 Kcal/mol
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