Titration Practical

Watch the following video and use it to answer the questions that follow.

When measuring out an acid or base with a 25ml pipette, the [ a) top || b) bottom  || c) middle ] of the meniscus should touch the line.

The figure shows a simple titration setup.

The long glass tube is called a   [ a) pipette  || b) dropper  ||  c) burette ]

The flask is called a/an   [ a) Erlenmeyer flask   || b) volumetric flask  || c) beaker ]

During a titration procedure, your first run is a test run to get a general sense of the equivalence point. You should   [ a) use || b) not use ] this run when calculating the average titre volume.

After the test run, you should have about   [ a) one || b) three  || c) fifteen ] more good trials, and find the average across these trials.

When bromothymol blue is used as an indicator, it is added to the    [ a) acid || b) base ]. The base is placed in an Erlenmeyer flask while the acid is added to the    [ a) pipette  || b) burette  ]

With bromothymol blue, when the equivalence point of the titration is reached when the solution turns     [ a) green/yellow ||  b) dark blue  ||  c) colorless/transparent  ]

Which of the following correctly states the formula connecting molar mass, number of moles and measured mass?

[ a) number of moles = molar mass/ mass ||  b) mass * number of moles = molar mass  ||  c) mass = molar mass/ number of moles ||  d) number of moles = mass/molar mass  ]

Which of the following correctly states the formula connecting concentration (mol/dm³), volume (dm³) and number of moles?

[ a) concentration = number of moles * volume ||  b) number of moles = concentration * volume  ||  c) number of moles = concentration/ volume ||  d) volume = concentration/number of moles]

A neutralization reaction is carried out between sodium hydroxide and sulfuric acid as shown below.

2NaOH(s) + H₂SO₄(aq) ⟶ Na₂SO₄(aq) + H₂O(l)

If 20 moles of sulfuric acid were used up, how many moles of sodium hydroxide were used up.

Answer:   (enter a whole number)

A neutralization reaction is carried out between calcium hydroxide and sulfuric acid as shown below.

Ca(OH)₂(s) + H₂SO₄(aq) ⟶ CaSO₄(aq) + 2H₂O(l)

If 20 moles of sulfuric acid were used up, how many moles of calcium hydroxide were used up.

Answer:   (enter a whole number)