Representations of a mole (RAM 1 d.p.)
I can accurately represent a set number of moles of various substances.
Representations of a mole (RAM 1 d.p.)
I can accurately represent a set number of moles of various substances.
Lesson details
Key learning points
- Manipulating apparatus correctly ensures both accurate results and safety in the lab.
- Interconversion between units like grams, moles, volume, density & particles is fundamental in chemical calculations.
- Successful interconversion is only possible if the units match.
- Using the appropriate apparatus for a required measurement can help to reduce uncertainty.
Common misconception
Pupils mistake that the same mass of different substances = the same number of particles.
This activity reinforces the mathematical relationship between relative formula mass of a substance, the number of particles present and the mass measured in the lab.
Keywords
Mole - something is 6.02 × 10²³ of it. The mass of a mole of a substance is its relative mass expressed in grams.
Apparatus - is a piece of equipment that is designed for a particular use.
Interconversion - is the ability to change between two units of measurement
Accuracy - refers to how close a measured value is to the true or standard value.
Uncertainty - is the range of measurements within which the true value can be expected to be found. On apparatus, it is half the value of one resolution marking.
Equipment
balance, weigh boat or equivalent, spatula, measuring cylinders, dropping pipettes, syringes, water, ethanol, sodium chloride, zinc, sodium hydrogencarbonate, sulfur, beakers, boiling/test tubes
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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