The diagram shows a burette and a measuring cylinder, both of which contain a liquid.
Which row shows the correct reading for both?
|
Burette |
Measuring cylinder |
|
|
A |
18.4 |
34 |
|
B |
18.4 |
56 |
|
C |
17.8 |
34 |
|
D |
17.8 |
56 |
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Measuring volumes of liquids is a fundamental aspect of experimental chemistry. The diagram shows three different pieces of apparatus used for this task.
Which row is correct?
|
1 |
2 |
3 |
|
|
A |
burette |
measuring cylinder |
pipette |
|
B |
burette |
pipette |
measuring cylinder |
|
C |
pipette |
measuring cylinder |
burette |
|
D |
measuring cylinder |
burette |
pipette |
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A student dissolved ammonium chloride in water when investigating energy changes in reactions.
Which terms best describes each substance?
| ammonium chloride | water | |
| A | solute | solvent |
| B | solvent | solution |
| C | solution | solvent |
| D | solute | solution |
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A student prepared crystals of copper sulfate from copper carbonate and sulfuric acid.
The student separated the excess copper carbonate from the solution using filtration.
What word describes the excess copper carbonate?
Residue
Filtrate
Solvent
Solution
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A student carries out a titration to determine the volume of hydrochloric acid needed to neutralise 25 cm3 of sodium hydroxide.
She measured 25 cm3 sodium hydroxide into a conical flask.
Which piece of equipment should she use to do this?
Burette
Measuring cylinder
Beaker
Pipette
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A student wants to investigate the rate of reaction between marble chips and hydrochloric acid by measuring the volume of carbon dioxide produced with different concentrations of acid.
The equation for the reaction is as follows:
2 HCl + MgCO3 → MgCl2 + CO2 + H2O
Which of the following lists of equipment can she use to measure the volume of the gas produced?
Gas syringe, cotton wool, bung, delivery tube
Gas syringe, conical flask, bung, delivery tube
Gas syringe, beaker, bung, balance
Balloon, conical flask, stopper, balance
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The steps below are for an acid-base titration.
| 1 | Record the final volume of hydrochloric acid in the burette |
| 2 | Add hydrochloric acid from the burette into the conical flask until the indicator changes colour |
| 3 | Record the initial volume of hydrochloric acid in the burette |
| 4 | Add a fixed volume of sodium hydroxide to a conical flask using a pipette |
| 5 | Add indicator |
What is the correct order of these steps?
3 → 4 → 2 → 5 → 1
4 → 3 → 2 → 1 → 5
4 → 5 → 3 → 2 → 1
5 → 3 → 2 → 1 → 4
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A student is following the written procedure for an experiment. The instruction states:
'Quickly add 25 cm3 of sodium hydroxide'
Which piece of apparatus would be most suitable to use?
Burette
Conical flask
Measuring cylinder
Volumetric pipette
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W, X, Y and Z are pieces of laboratory apparatus.
Which row describes the most appropriate use of the apparatus for the measurement taken?
| Apparatus | Measurement taken | |
| A | W | 0.5 cm3 of acid to add to marble chips in a rate of reaction investigation |
| B | X | 20 cm3 of sodium hydroxide for use in a titration |
| C | Y | 26.70 cm3 of hydrochloric acid added to sodium hydroxide in a titration |
| D | Z | 85 cm3 of gas given off in a rate of reaction investigation |
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A student decided to investigate the rate of reaction between marble chips and dilute hydrochloric acid at 35 oC.
She had access to the following apparatus:
W a balance
X a thermometer
Y a measuring cylinder
Z a stopwatch
Which pieces of apparatus did she use?
X, Y and Z only
W, Y and Z only
W, X and Z only
W, X, Y and Z
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A student prepared a solution of copper(II) sulfate by mixing dilute sulfuric acid with an excess of copper(II) oxide.
They filtered the mixture using the apparatus below.
Which terms best describes each substance?
| Solvent | Solute | Filtrate | Residue | |
| A | water | copper(II) sulfate | copper(II) sulfate solution | copper(II) oxide |
| B | dilute hydrochloric acid | copper(II) oxide | water | copper(II) oxide |
| C | water | copper(II) sulfate solution | copper(II) oxide | copper(II) sulfate |
| D | copper(II) sulfate solution | water | dilute hydrochloric acid | water |
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A student performed a titration to find the volume of hydrochloric acid required to neutralise 25.0 cm3 of sodium hydroxide using the following method.
Another student suggested the following changes.
| 1 |
Use a pipette to measure the sodium hydroxide |
| 2 |
Use universal indicator as the indicator |
| 3 |
Repeat the experiment until the results are concordant |
| 4 |
Ensure that the initial volume of hydrochloric acid reads 0.00 cm3 on the burette |
Which suggestions would improve the experiment?
1 and 2
1 and 3
2 and 3
3 and 4
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A student titrated sodium carbonate solution against 25 cm3 of hydrochloric acid.
They used methyl orange as an indicator.
What is the colour changed observed at the end point?
red to yellow
yellow to orange
yellow to red
red to orange
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Why is it important to fill the space below the tap in a burette with acid or alkali before beginning a titration?
To give a more accurate result
The burette's scale does not include this volume
To give concordant results
An incorrect volume would be recorded
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