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Grade 7 Science Solutions
Solutions… a review zA homogeneous mixture ie. they appear as ONE substance Examples: tap water, vinegar, gold jewelry, etc.
Solutions have 2 parts: Solute zThe substance that dissolves (found in less amounts) Solvent z The substance in which the solute dissolves (found in the greatest amounts)
Dissolving... zTo mix completely ie. the solute dissolves into the solvent. zSome substances are able to dissolve better than others.
zThe Particle Theory of Matter states that “there are attractive forces between the particles”.
zIn order to dissolve, the particles must be more strongly attracted to the particles of the solvent than to themselves. This means that the solute is soluble in that solvent.
zIf the particles of the solute are more attracted to their own particles than the solvent particles, dissolving does NOT occur. The solute is said to be insoluble in that solvent. (ie. Mechanical)
Soluble or Insoluble? soluble insoluble
Solvent or Not? Some materials are good solvents for some solutes but not others. For example, oil is insoluble in water but soluble in gasoline.
Does it Dissolve? Complete Activity 8-1C Page 259
States of Solutes and Solvents Air Solute: oxygen, carbon dioxide, other gases Solvent: nitrogen Gas
Soda Solute: carbon dioxide Solvent: water Gas Liquid
Vinegar Solute: acetic acid Solvent: water Liquid
Filtered Sea Water Solute: Salt and other minerals Solvent: Water Solid Liquid
Brass Solute: zinc Solvent: copper Solid **Alloy: Solutions made from two or more metals.
WHAT ARE SOLUTIONS? How are they useful in our everyday lives?
Matter (Review and New)
Chapter 3 Elements, Compounds, and mixtures Introduction to Matter
Investigation 9A What does it mean to dissolve? Solubility.
Properties of Solutions
Grade 7 Science: Pure Substances and Mixtures By: Michelle and Rawan
What makes a mixture a solution?
Classification of Matter Matter – anything that has mass and takes up space Pure Substance - matter that CANNOT be physically separated Compound – made.
Solutions. Describe the properties of a solution. Identify the solute and solvent in the preparation of a solution. Describe and give examples of.
Grade 7 Science Solutions.
Review What’s the difference between a pure substance and a mixture? What’s the difference between a mechanical mixture and a solution? Of mechanical.
Pure Substances and Mixtures
Highland Science Department Types of Solutions. Highland Science Department Types of Solutions Solution: a homogeneous mixture of two or more substances.
Lesson 12: What Happens When Substances are Mixed with Water?
UNIT 4 EXTENSION Solutions and Solubility. What is a solution? solution homogeneous A solution is a homogeneous mixture of 2 or more substances. evenly.
When talking about a liquid-what does the word “solution” mean?
Mixtures, Elements and Compounds
A Matter of Fact.
Chapter 5 State Standards: 3.b; 5.a; 7.c 1. Chapter 5-1: Elements 2.
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