Chemistry Chapter 1.1: How are physical quantities measured? (Experimental Chemistry)

Measurements/units. What apparatus is commonly used in lab to MAKE MEASUREMENTS?

SI Unit/Common Unit of Mass

SI: kg. Common: g

SI Unit/Common unit of Time

SI/Common: s.

SI Unit/Common unit of Temperature

SI: K. Common: °C

SI Unit/Common unit of Volume

SI: m³. Common: cm³

SI Unit/Common unit of Amount of Substance

SI: mole. Common: mol

SI Unit/Common unit of Concentration

SI/Common : mol/dm³

SI Unit/Common unit of Density

SI: kg/m³. Common: g/cm³

Electronic Balance

Readings taken to ±0.01, 2d.p

Digital Stopwatch

Readings taken to ±1s e.g. 9s

Thermometer

Readings taken to ±0.5 e.g. 42.0, 16.5, 15.5

Measuring Cylinder

Readings taken to nearest cm³ e.g. 12m³, 42cm³ or stated otherwise in instruction ± 0.5cm³ e.g. 12.0cm³, 41.5cm³

Beaker

Used to estimate the volume of liquid only. E.g. 50cm³ or 100cm³. Normally used to hold/contain liquid, mix liquids together or heating liquid.

Burette

Can accurately measure between 0.00cm³ and 50.00cm³ of a solution to ±0.05cm³. E.g. 26.00cm³ or 35.65cm³

Pipette

Used to measure exactly, a fixed volume of 20.0 or 25.0cm³ of a solution, and nothing else. (Not 25.1 or 20.7)

Conical Flask

Can be used to measure approximately 50cm³ and 100cm³ of a solution.