SQA Advanced Higher Chemistry Area 3 Researching Chemistry overview quiz quiz

A measuring cylinder

A pipette

A beaker

A conical flask

To separate liquids by boiling point

To heat a reaction mixture for a long time without losing volatile substances

To precipitate a solid

To measure a melting point

Distillation

Recrystallisation

Titration

Colorimetry

An impure solid

A pure solid

A liquid mixture

A coloured complex

To weigh the product

To monitor reaction progress and check purity by comparing spots

To measure the boiling point

To deliver an accurate volume

n = m divided by M

n = c times V

n = m times M

n = V divided by c

To speed up the reaction

To ensure all of the ion is precipitated so the full amount is weighed

To change the colour

To lower the melting point

A titration done in reverse order

Adding a known excess of reagent, then titrating the leftover excess

A titration with no indicator

A titration of a coloured solution

The desired product mass with the total reactant mass

The actual product obtained with the theoretical maximum

The number of moles of acid and base

The accuracy with the precision

They mean the same thing

Accuracy is closeness to the true value; precision is closeness of repeats to each other

Accuracy is closeness of repeats; precision is closeness to the true value

Accuracy applies only to titrations

Systematic error

Random error

Both equally

Neither

a random error

a systematic error

perfect accuracy

no error at all

To make the report longer

To reflect the precision of the apparatus and let the reader judge reliability

To avoid doing calculations

To change the conclusion

To increase the word count

To acknowledge other work, allow it to be checked, and avoid plagiarism

To replace the results section

To improve the accuracy of measurements