Acid-Base Titrations Quiz

What piece of equipment is used to accurately measure and deliver a variable volume of a titrant?

• Measuring cylinder

• Burette

• Pipette

• Beaker

Which of the following indicators is best for a weak acid-strong base titration?

• Methyl orange

• Phenolphthalein

• Bromothymol blue

• Litmus

Which statement about titration is incorrect?

• A) The analyte is always in the conical flask

• B) The titrant is always in the burette

• C) The equivalence point always occurs at pH 7

• D) A colour change occurs at the endpoint

A student incorrectly over-titrates by adding too much NaOH. How will this affect the final calculated concentration of the acid?

• It will be too high

• It will be too low

Fill in the blank: The equivalence point in a titration is the point at which the amount of titrant added is ______ to the amount of substance in the sample.

• equal

• greater

• less

True or False: The titrant is always a strong acid or base.

• True

• False

In a titration, if the pH at the equivalence point is greater than 7, what type of titration is likely being performed?

• Strong acid-strong base

• Weak acid-strong base

• Strong acid-weak base

Which of the following is true about the endpoint of a titration?

• It is the same as the equivalence point

• It is indicated by a color change

• It occurs before the equivalence point

Which section of a titration curve represents the buffer region?

• Before the equivalence point

• At the equivalence point

• After the equivalence point

• There is no buffer region

A student titrates a 0.200 mol L⁻¹ NaOH solution with HCl. The volume of NaOH used was 20.00 mL, and the final pH was measured at 6.8. What is the most likely reason for this?

• The solution was contaminated

• The NaOH was weaker than expected

• The pH meter was faulty

• The student did not reach the equivalence point