How do we recognize the endpoint of this tirtation? O the first fiash of pink th

Question

How do we recognize the endpoint of this tirtation? O the first fiash of pink the first appearance of pink that does not disappear on stirring O a deep strong pink color O a transition from pink to colorless QUESTION 5 1 points Saved The point in a titration when the amount of acid and base that have been added are exactly enough to completely neutralize without either being present in excess is the O reaction point O neutralization point O stoichiometric point O end point Click Saue and Submit bu sale and stahmitCHck Sore Atl Ansuers to suve all sensuers.

Explanation / Answer

Stoichiometric point / equivalence point : (amount of moles of acid and base are the same)

The point where both the acid and base are mixed in exact stoichiometric ratio. i.e all the acid has been neutralized by the base.

HCl + NaOH ----------------> NaCl + H2O

The point where the reaction has just been completed also known as equivalent point and refers to the stoichiometric quantities of reactants. For example ,when we added 1 mole HCl to 1 mole of NaOH. Generally polyprotic acid will have morethan one equivalent point.

End point :

The point where the indicator changes the color of the solution. It would take one or two more drops of acid or base to get to this point. Depending on the pH range of the indicator different indicators will give different colors.

Hopu understand. please feel free to ask if u have any doubt.

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