Question

select all true statements (check all that apply) the equivalence point means the point where the moles of acid equals the moles of base. the end point has more base than acid the beginning of the reaction has more acid than base the beginning of the reaction has more base than acid the end point has more acid than base

Explanation:

• The equivalence point in an acid - base reaction is defined as the point where the moles of acid equal the moles of base.
• At the beginning of an acid - base reaction (assuming we are adding base to acid), there is more acid than base.
• The end - point (due to the indicator used) may not be the same as the equivalence point. But in a typical acid - base titration where we start with an acid in the flask and add base from the burette:
• The end - point is just a bit beyond the equivalence point (due to the indicator's color change), so there is more base than acid at the end - point.

Answer:

• The equivalence point means the point where the moles of acid equals the moles of base.
• The end point has more base than acid.
• The beginning of the reaction has more acid than base.