Answer:
Kindly check the attached picture for the diagram showing the titration curve.
Explanation:
The term "titration" is an important part of chemistry because it is being used in the Determination of the concentration is the unknown.
In this question, the titration is done between a polyprotic weak acid, that is Phosphoric acid (H3PO4) and a strong base, NaOH.
H3PO4 + OH^- -----------------> H2O + H2PO4^-.
H2PO4^-2 + OH^- ---------------> H2O + HPO4^2-
HPO4^- + OH^- ------------------> H2O + PO4^3-.
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Hey there!:
Given that;
SO2 (g ) = (-296.8 kJ/mol) and SO3 (g )= (-395.7 Kj/mol)
2 SO2(g) + O2(g) --------------> 2 SO3(g)
ΔH reaction = ΔH of product - ΔH of reactant
We know that ΔH O2 = 0 kj
ΔH reaction = [2 x - 395.7] - [2 x - 296.8 +0.0 KJ]
= - 791.4 - (- 593.6)
= - 791.4 + 593.6
= - 197.8 kJ
Because there are 2 mole of SO2 coverted into 2 mole of SO3 :
=- 197.8 kJ/2 mol
ΔH°rxn = - 98.9 kJ/ mol
Hope that helps!