Chapter 14 - Titrations

What glass instrument is needed for titration experiments?

Burette

In a titration experiment, where is the titrant placed?

In the burette

In acid-base titrations, what is the equivalence point referring to?

It is the point at which moles of H+ ions are equal to the moles of OH- ions

In acid-base titrations, what is the buffering region referring to?

The buffering region refers to the portion of the curve where the pH of the solution has not drastically changed with the addition of titrant

What is the formula for calculating normality based off of molarity?

N = M x n.

'M' being molarity of solution and 'n' being number of H+ or OH- ions per molecule

What is the normality for 3M of HCl?

N = 3 x 1. As such, 3

What is the normality for 10M of H2SO4?

H2SO4 is a strong polyprotic acid that can donate 2 H+ per H2SO4. As such, N = 10 x 2

Will the reaction between a strong acid and weak base result in an equivalence point above or below a pH of 7?

Below pH 7

Will the reaction between a weak acid and strong base result in an equivalence point above or below a pH of 7?

Above pH 7

Why are indicators used in acid-base titration?

To provide a visual indication of when the endpoint has been reached

When picking an effective indicator, what should be taken into consideration regarding the indicator's pKa?

The indicator should have a pKa value close to the pH at which the equivalence point takes place in order to provide an accurate visual cue

A weak acid is to be titrated with strong base. If an indicator were to be used, should it have a slightly acidic pH range or slightly basic pH range for visualization?

Slightly basic pH, as titration between a weak acid and strong acid will result in. an equivalence point above pH of 7

What two products form in a neutralization reaction?

Water and an insoluble salt

What would be the equivalence point for titrations involving a monoprotic strong acid and a monoprotic strong base?

An equivalence point at pH of 7

H2SO4 is a polyprotic strong acid. How many equivalence points do you expect to see if H2SO4 is titrated with a base?

Two, as H2SO4 can donate 2 H+ per H2SO4