When a monoprotic weak acid is titrated with a strong base, the titration curve contains these many inflection points:
a.zero
b.one
c.two
d.three
Can you also explain why you choose your answer to this question...thanks
To determine the number of inflection points in the titration curve of a monoprotic weak acid titrated with a strong base, we need to consider the nature of the acid and the base, as well as the stoichiometry of the reaction.
In this case, a monoprotic weak acid refers to an acid that can donate only one proton (H+ ion) per molecule in a chemical reaction. When it is titrated with a strong base, the acid reacts with the base to form water and a salt. The reaction equation can be represented as follows:
Weak Acid (HA) + Strong Base (BOH) → Salt (BA) + Water (H2O)
During the titration, as we gradually add the strong base to the weak acid, the pH of the solution increases due to the neutralization of the acid by the base. The titration curve shows the change in pH as a function of the volume of the added base.
Now, since we are dealing with a monoprotic weak acid, there will be only one equivalence point, which is the point at which the moles of acid are stoichiometrically equivalent to the moles of base. At this point, all the weak acid molecules have reacted with the strong base, resulting in a neutral solution. This single equivalence point represents a sudden change in the pH, and it is the only inflection point on the titration curve for a monoprotic weak acid.
Therefore, the correct answer to the question is (b) one.
Explanation: The titration of a monoprotic weak acid with a strong base produces a titration curve with only one inflection point at the equivalence point.