Saturated solutions
I can compare data involving the solubility of different solutes and use it to describe saturation.
Saturated solutions
I can compare data involving the solubility of different solutes and use it to describe saturation.
Lesson details
Key learning 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.
- 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.
Keywords
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 misconception
Pupils are reluctant/struggle to plot multiple sets of data on one graph.
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.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What happens to most solutes as the temperature of a solvent increases?
Q2.When drawing a graph in science, which of the following graphs have their variables plotted correctly?
Q3.What is typically used in science to predict values from a graph?
Q4.Solubility is a description of how well a solvent can dissolve into a solute.
Q5.What type of graph is most appropriate for showing the relationship between suggested variables? KEY: Independent variable (IV) | Dependent variable (DV)
IV: hair colour | DV: number of students
IV: mass of sugar | DV: time taken to dissolve
IV: shoe size | DV: favourite food
Q6.The term for the measure of how much a substance can dissolve in a given amount of solvent at a specific temperature is...
Assessment exit quiz
6 Questions
Q1.What observation indicates that a solution has become saturated?
Q2.A line of best fit on a solubility graph can be used to predict the solubility of a solute at temperatures not directly tested.
Q3.When solutes become insoluble as a solution cools, it may lead to the formation of...
Q4.The process of a solute dissolving in a solvent until no more can dissolve at a particular temperature is known as reaching...
Q5.Match the following key terms to their descriptions.
Describes something that can dissolve in a solvent.
Describes something that cannot dissolve in a solvent.
A solution that cannot dissolve any more solute.
The mixture formed between solute and solvent.
A measure of how well something dissolves.
A substance that can dissolve to form a solution.
Q6.Use the graph to determine the mass (in grams) of sugar that will dissolve in 100 cm³ of water at 85℃. (Give the number to the nearest hundred).
