Measurement and Experimental Techniques

In an experiment, a student needs to measure out 36.50 cm³ of a solution.

Which piece of apparatus would measure this volume most accurately?

• beaker

• burette

• measuring cylinder

• pipette

A student wishes to add exactly 13.2 cm³ of acid to exactly 25.0 cm³ of an alkali as part of an experiment.

Which apparatus should the student use to measure these volumes?

• acid : pipette

  alkali : burette

• acid : burette

  alkali : measuring cylinder

• acid : burette

  alkali : pipette

• acid : measuring cylinder

  alkali : pipette

Which piece of apparatus should be used for the accurate measurement of 26.0 cm³ of a liquid?

• beaker

• burette

• measuring cylinder

• pipette

A student sets up the following apparatus for an experiment.

What are Q and R?

• Q : balance

  R : burette

• Q : burette

  R : balance

• Q : burette

  R : pipette

• Q : pipette

  R : balance

Students do an experiment that produces a soluble gas.

Which apparatus allows them to measure the volume of the gas most accurately?

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A student intends to measure the rate of the reaction between a stated volume of hydrochloric acid and a lump of calcium carbonate.

 

CaCO₃ (s) + 2HCl (aq) --> CaCl₂(aq) + H₂O(l) + CO₂(g)

 

Which piece of apparatus is not required?

• stopwatch

• downward delivery

• measuring cylinder

• thermometer

A student carried out an experiment to study the rate of reaction when a piece of magnesium was added to some dilute hydrochoric acid.

Which piece of apparatus is not required for this experiment?

• conical flask

• stop watch

• gas syringe

• Bunsen burner

The diagrams show two methods of collecting gases.

Which row gives the properties of a gas which can be collected by both methods?

• property 1 : insoluble in water

  property 2 : denser than air

• property 1 : insoluble in water

  property 2 : less dense than air

• property 1 : soluble in water

  property 2 : denser than air

• property 1 : soluble in water

  property 2 : less dense than air

The apparatus used to measure the rate of a chemical reaction is shown.

For which reaction is the apparatus suitable?

• Mg + Cl₂ --> MgCl₂

• MgCO₃ + 2HCl --> MgCl₂ + CO₂ + H₂O

• MgO + 2HCl --> MgCl₂ + H₂O

• Mg(OH)₂ + 2HCl --> MgCl₂ + 2H₂O

Which pieces of apparatus must be used to carry out an experiment to measure the change in temperature when 1g of magnesium powder is added to excess dilute hydrochloric acid?

1 a balance

2 a gas syringe

3 a stopwatch

4 a thermometer

• 1 and 2

• 1 and 4

• 2 and 3

• 3 and 4