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Year 7 - Science

Saturated solutions

Solutions

Unit Summary

This unit explores the concepts of pure substances, mixtures, and diffusion in liquids and gases. It emphasises accuracy, precision, and the use of appropriate techniques during investigations. The focus is on making predictions and recording reliable observations.

Lesson Summary

You will learn to compare data involving the solubility of different solutes and use it to describe saturation.

Key Notes

  • At a given temperature, there is a limit to how much solute can dissolve in a solvent.
  • Solutes may become insoluble as a solution cools.
  • Lines of best fit can be used to predict unknowns values if one variable is known.
  • Data from multiple investigations can be plotted on the same graph for ease of comparison.

Vocabulary To Learn

  • saturated solution: A saturated solution is one in which no more solute can dissolve in the solvent at a given temperature.
  • solubility: Solubility refers to how well a solute is able to dissolve in a solvent to create a solution.
  • line of best fit: A line that depicts the trend of scattered data plots on a graph.

Common Mistakes To Avoid

  • Pupils are reluctant/struggle to plot multiple sets of data on one graph.

3 Quick Questions (With Answers)

1. Explain the scientific idea in this lesson using two key points.

At a given temperature, there is a limit to how much solute can dissolve in a solvent. Solutes may become insoluble as a solution cools.

2. Define this scientific word and use it in context. 'saturated solution'

A saturated solution is one in which no more solute can dissolve in the solvent at a given temperature. Include the word in a full scientific explanation, not as a single label.

3. Correct this common scientific misunderstanding.

Mistake: Pupils are reluctant/struggle to plot multiple sets of data on one graph. Correction: Fold the table of results so pupils are only looking at one set of data at a time when plotting. Use different plot symbols/colours too.

More Lessons In This Unit

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