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Grade. 7. Science. Solutions. Solutions…. a. review.  A. homo g eneous. mixture. ie. they. appear. as. ONE. substance. Examples:. tap. water, jewelry,. vinegar,. gold. et c . Solutions. have. 2. par t s:. Solute  The substa n ce dissolves. Solvent.  The.

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  1. Grade 7 Science Solutions

  2. Solutions… a review A homogeneous mixture ie. they appear as ONE substance Examples: tap water, jewelry, vinegar, gold etc.

  3. Solutions have 2 parts: Solute Thesubstancedissolves Solvent The substance that in which the solute (found dissolves inthe (found in less greatest amounts) amounts)

  4. Dissolving... To mix completely ie. the solute dissolves into the solvent. Some substances are able to dissolve better than others.

  5. The Particle Theory of Matter statesthat “there are attractive forces between the particles”.

  6. In order to dissolve, the particles stronglyparticles must be more attracted to the of the solvent than to themselves. This means that that the solute is soluble in solvent.

  7. If the particles of the solute are more attractedto their own particles than the solvent particles, dissolving Thesolute does NOT occur. is said to be insoluble in that solvent. (ie. Mechanical)

  8. Soluble or Insoluble? soluble insoluble

  9. Solvent or Not? Some materials are good solutes solvents for some but not others. For insoluble example, oil is in water but soluble in gasoline.

  10. Does it Dissolve? Complete Activity 8-1C Page 259

  11. States of Solutes and Solvents Air oxygen, Solute: carbon gases Gas dioxide, other Gas Solvent: nitrogen

  12. Soda Solute: carbon Solvent:water Gas Liquid dioxide

  13. Vinegar Solute: aceticacid Solvent:water Liquid Liquid

  14. FilteredSeaWater Solute: Salt and Solid other minerals Solvent:Water Liquid

  15. Brass Solute: zinc Solid Solidmade Solvent: **Alloy: from two copper Solutions or more metals.

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