WorksheetsAcid-Base Titrations
Total questions: 12
Worksheet time: 6mins
A titration involves the chemical reaction between an analyte solution and the
titrant
titrator
standard
all of the above
Back titrations are used when
the direct titration would be tediously slow
the analyte is completely insoluble
the end point cannot be visualized with any chemical indicators
a front titration just won't do
If the Erlenmeyer flask contains acidic solution and a few drops of phenolphthalein, its color will be
pink
blue
red
colorless
The equivalence point is the
theoretical halfway point of the reaction
empirically derived completion of the reaction using phenolphthalein
theoretical completion of the reaction
the actual measurement based on the presence of the indicator
What makes KHP a primary standard?
available in highly pure crystals
highly stable and can be dried of atmospheric moisture
reacts precisely and reproducibly
can be precisely massed and molecular mass known
all of the above
In addition to neutralization, what other class of reaction occurs between KHP and NaOH solutions?
combustion
double replacement
single replacement
composition
What is the normal pH of gastric (stomach) juices?
3
6
9
I don't drink juice
Common basic salts in antacid tablets include all except
calcium dihydrogen phosphate
aluminum chloride
magnesium hydroxide
sodium bicarbonate
If a 40 mL solution of HCl required only 10 mL of NaOH titrant to reach the equivalence point, the relative molar concentration ratio (base:acid) is
1/4
1
1:1
4
If NaOH solution added to a solution at physiological pH raises the pH to the phenolphthalein end point (around pH 8.35), the acidity of the solution has
increased 10x
decreased 1x
decreased 10x
increased 1x
What is the impact of not transferring all of the KHP from your weigh boat to the Erlenmeyer in Part A?
lower volume of KHP needed
lower volume of base needed
concentration of base will be underestimated
no impact at all
What is the impact of adding small volume of water to the KHP in the Erlenmeyer in Part A?
dilutes KHP so less base solution required to neutralize
need to add a lil bit more KHP to even things out
must redo titration
no impact; only need approximate KHP solution volume for Part A
