Dissolving, Mixtures and Changes of State - Presentation is part of the lesson Dissolving, Mixtures and Changes of State    Students will learn about dissolving, mixtures and changes of state as part of their learning about properties and changes of materials, as specified by the national curriculum in England: science programmes of study.

<p>In this engaging chemistry lesson, students delve into the fascinating world of solutions, mixtures, and changes of state. They are prompted to explore and identify the components of a solution, such as the solute—the substance that dissolves, typically a solid—and the solvent, which is usually a liquid like water. The lesson uses an example of a common solution, ocean water, where salt acts as the solute and water as the solvent. Through a science program watched by characters Mario and Kelly, students learn that solutions are a type of mixture that can be separated by physical means, making the process reversible and distinct from chemical changes where new substances are formed. The lesson further clarifies that when a solute like salt dissolves, it does not disappear but occupies spaces between the solvent's molecules.</p>

<p>Practical experiments in the lesson allow students to investigate solubility by mixing various solids with water to determine if they form solutions. They discover that soluble solids can be dissolved to create solutes within the solvent, while insoluble solids do not. The concept of solubility is expanded upon with discussions on how temperature affects the ability of a solute to dissolve, revealing that higher temperatures can increase solubility. Additionally, the lesson covers the reversible nature of changes of state with water, examining how ice, water, and steam are all the same substance in different states, and can transition from one state to another through processes like melting, evaporating, condensing, and freezing. Through these explorations, students gain a deeper understanding of the principles of dissolving, the formation of mixtures, and the reversible changes of state in materials.</p>

Dissolving, Mixtures and Changes of State - Lesson Plan is part of the lesson Dissolving, Mixtures and Changes of State    Students will learn about dissolving, mixtures and changes of state as part of their learning about properties and changes of materials, as specified by the national curriculum in England: science programmes of study.

Dissolving, Mixtures and Changes of State - Lesson Plan

Dissolving, Mixtures and Changes of State - Teacher Explanation is part of the lesson Dissolving, Mixtures and Changes of State    Students will learn about dissolving, mixtures and changes of state as part of their learning about properties and changes of materials, as specified by the national curriculum in England: science programmes of study.

Teacher Explanation

Dissolving, Mixtures and Changes of State - Teacher Explanation

Dissolving, Mixtures and Changes of State - Objectives Labels is part of the lesson Dissolving, Mixtures and Changes of State    Students will learn about dissolving, mixtures and changes of state as part of their learning about properties and changes of materials, as specified by the national curriculum in England: science programmes of study.

Objectives Labels

Dissolving, Mixtures and Changes of State - Objectives Labels

Dissolving, Mixtures and Changes of State - Results Tables is part of the lesson Dissolving, Mixtures and Changes of State    Students will learn about dissolving, mixtures and changes of state as part of their learning about properties and changes of materials, as specified by the national curriculum in England: science programmes of study.

Results Tables

Dissolving, Mixtures and Changes of State - Results Tables

Dissolving, Mixtures and Changes of State - Self Assessment is part of the lesson Dissolving, Mixtures and Changes of State    Students will learn about dissolving, mixtures and changes of state as part of their learning about properties and changes of materials, as specified by the national curriculum in England: science programmes of study.

Self Assessment

Dissolving, Mixtures and Changes of State - Self Assessment

<p>This lesson focuses on teaching pupils how to demonstrate that dissolving, mixing, and changes of state are reversible changes. They will learn how to compare and group everyday materials based on properties such as hardness, solubility, transparency, conductivity, and response to magnets. This lesson covers topics learned in previous years including states of matter, properties of everyday materials, and how to change the shape of solid objects.</p> <p>The cross-curricular links include ICT, where pupils can research the contents of seawater, and Maths, where pupils can create graphs of their experimental results. Additionally, pupils can learn about the history of metalworking and the transition from Bronze to Iron Age. Some common misconceptions, such as pure orange juice being a pure substance and air being a single substance, will be corrected in this lesson.</p> <h2>Keywords</h2> <ul> <li>Solute</li> <li>Solvent</li> <li>Solution</li> <li>Dissolving</li> <li>Soluble</li> <li>Insoluble</li> <li>Saturated</li> <li>Mixture</li> <li>Reversible</li> </ul> <h2>Influential Scientists</h2> <ul> <li>Mary Maynard</li> <li>Daly</li> <li>Linus Pauling</li> <li>Rosalind Franklin</li> <li>Stephanie Kwolek</li> </ul> <h2>Important Lesson Guidance</h2> <p>Citric acid and bicarbonate of soda are needed for the activity and can be obtained from a local secondary school or online. Bicarbonate of soda can also be purchased from a local supermarket.</p> <h2>Activity: Making a Solution</h2> <p>In this activity, each pupil in the group will be given a clear plastic cup and a solid such as salt, sugar, sand, or soil. They will fill the cup with half water, add one teaspoon of the solid, and observe if the solid dissolves. The group will share their results and fill in the table to determine if the solid is soluble or insoluble.</p> <h2>Activity: Solubility of Solutes</h2> <p>In this activity, each pupil will have their own cup, solute (salt, bicarbonate of soda, granulated sugar, or citric acid), and a set of measuring cylinders. They will measure 30ml of water, add a flat teaspoon of the solute, and stir well. The pupils will observe the water to see if the solute has dissolved and repeat the process until the saturation point is reached. The pupils will record their results and rank the solubility of each solute.</p> <p>The science behind this activity is explained by the solutes moving into the gaps between water particles when they dissolve. Once the spaces are filled, no more solute can dissolve and the saturation point is reached. The pupils will learn that the four solids being tested are solutes and the water is the solvent.</p>

Dissolving, Mixtures and Changes of State

Science

Year 5

Properties and Changes of Materials

Dissolving, Mixtures and Changes of State - Presentation

Pzaz is a specialist, primary science provider, with schemes written for the non-specialist primary teacher. Created by a science education expert, Pzaz covers every statement of the National Curriculum for Reception to Year 6.