Experimental Techniques (Cambridge (CIE) IGCSE Chemistry)
Flashcards
1/32What is the name of this piece of apparatus?
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Cards in this collection (32)
What is the name of this piece of apparatus?
This piece of apparatus is called a gas syringe.
True or False?
A temperature probe is more precise than a thermometer.
True.
A temperature probe is more precise than a thermometer.
What is the name of this piece of apparatus?
This piece of apparatus is called a measuring cylinder.
Give an advantage of using a temperature probe over a thermometer.
Advantages of using temperature probes include:
More precise readings.
Easy to make multiple readings.
Can be automated to run over long periods of time.
Name the piece of apparatus which could be used to time the length of a reaction.
The piece of apparatus which could be used to time the length of a reaction is a stopwatch / stopclock / timer.
Name the piece of apparatus which could be used to measure the volume of gas produced when marble chips are added to hydrochloric acid.
The piece of apparatus which could be used to measure the volume of gas produced when marble chips are added to hydrochloric acid is a gas syringe.
True or False?
A measuring cylinder is more accurate than a pipette for measuring a fixed volume of liquid.
False.
A measuring cylinder is less accurate than a pipette for measuring a fixed volume of liquid.
What is the volume on the burette to one decimal place?
The volume on the burette to one decimal place is 17.8 cm3.
Name the piece of apparatus which could be used to measure out 0.5 g of magnesium powder.
The piece of apparatus which could be used to measure out 0.5 g of magnesium powder is a balance.
What is the standard unit of mass in chemistry?
The standard unit of mass in chemistry is grams.
True or False?
The solvent in a mixture of salt and water is the salt.
False.
The solvent in a mixture of salt and water is the water.
True or False?
The filtrate is a liquid or solution that passes through a filter.
True.
The filtrate is a liquid or solution that passes through a filter.
Define the term solute.
A solute is the substance which dissolves in a liquid to form a solution.
Define the term solvent.
A solvent is the substance that dissolves a solute.
Define the term solution.
A solution is a mixture of one or more solutes dissolved in a solvent.
What is meant by a saturated solution?
A saturated solution is a solution containing the maximum concentration of a solute dissolved in the solvent at a specified temperature.
What word is used to describe the substance that remains in the funnel?
The word is used to describe the substance that remains in the funnel is the residue.
True or False?
Residue refers to a substance that remains after separation process.
True.
Residue refers to a substance that remains after separation process.
Identify the solvent and solute in a solution of salt water.
In a solution of salt water, the salt is the solute and the water is the solvent.
Define the term filtrate.
A filtrate is a liquid / solution that has passed through a filter.
What is an acid-base titration used for?
An acid-base titration is a method used to determine the concentration of an unknown acid or alkali.
State what is meant by concordant results.
Concordant results are results that are within 0.1 cm3 of each other.
What is the purpose of the indicator in a titration?
The indicator is used to identify the endpoint of the titration by changing colour sharply when the reaction is complete.
True or False?
Leaving a funnel in the burette during a titration is acceptable.
False.
The funnel should be removed from the burette before starting the titration, as it can drip liquid into the burette, making the initial reading false.
What is the name of this piece of apparatus?
This piece of apparatus is a pipette.
Why is it important to repeat a titration?
Repeating a titration and achieving concordant results increases the accuracy of the measurement.
State what is meant by the term endpoint.
The endpoint is when an indicator changes colour sharply during a titration, signalling the completion of the reaction.
What is the purpose of swirling the flask during a titration?
Swirling the flask during a titration ensures thorough mixing of the solutions and helps to identify the endpoint more accurately.
Name the piece of equipment used to transfer a fixed volume of acid / alkali into a conical flask for a titration.
The piece of equipment used to transfer a fixed volume of acid / alkali into a conical flask for a titration is a volumetric pipette.
Why is a white tile placed underneath the conical flask during a titration?
A white tile placed underneath the conical flask during a titration because it allows the colour change to be observed more easily.
Name the piece of apparatus that measures a variable volume of acid / alkali during a titration.
The piece of apparatus that measures a variable volume of acid / alkali during a titration is a burette.
What is the name of this piece of apparatus?
This piece of apparatus is called a burette.