Used water from homes, industry and agriculture.

The solid collected after sedimentation during treatment of  wastewater.

The fluid component obtained after sedimentation during the treatment of wastewater.

A process that occurs in the presence of oxygen.

A process that occurs in the absence of oxygen.

Wastewater treatment

Combined science

Separating mixtures (including formulations)

Solutions

Filtration

Crystallisation

Chromatography: paper

Interpreting chromatograms

Chromatography: separating a mixture of inks

Distillation: simple distillation

Distillation: separating a mixture of inks

Distillation: fractional distillation

Potable water

Water sample analysis: pH

Water sample analysis: dissolved solids

Water sample analysis: distillation

In the Making Salts unit, pupils will build on their understanding of separation techniques to learn about the process of making salts and writing balanced chemical equations.

In the Separation Techniques unit, pupils learned about various methods for separating mixtures, including filtration, evaporation, distillation, and chromatography.

This unit explores purification techniques, including filtration, crystallisation, and distillation. It explains formulations, uses chromatographic methods to identify pure and impure substances, and interprets chromatograms with Rf values. The emphasis is on accurate measurements.

Separating substances

Which process used in wastewater treatment involves bacteria breaking down organic matter?

Which of the following might lead to wastewater production?

water that is clean and suitable for drinking

water that comes from sinks, showers and washing machines 

water that is used for industrial processes

What is the purpose of sedimentation in wastewater treatment?

What can the anaerobic treatment of sludge produce?

What is the final step involved in wastewater treatment before it is released into the environment?

used water from homes, industry and agriculture

Which of these is a solid component collected after sedimentation during wastewater treatment?

Which process occurs in the presence of oxygen?

screening removes large insoluble objects

sedimentation removes small, insoluble particles settle out of the water source

filtration removes very small, insoluble particles

sterilisation kills bacteria and other microbes

Put the steps for making potable water from groundwater or freshwater into the correct order.

Why is it important to treat wastewater before releasing it into the environment?

Wastewater treatment

Lesson outcome