Separating Materials
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The water has evaporated, leaving behind the salt crystals.
Separating Materials
- 2. Soluble : will dissolve or spread all through the liquid Insoluble : will not dissolve in the liquid Solute : a solid dissolved in a liquid Solvent : the liquid a solid dissolves in
- 3. No Materials/ Condition after Dissolve / not Mixture/ substances mixing with water dissolve solution 1 Sugar The sugar seems Dissolve Solution disappear 2 Salt The salt seems Dissolve Solution disappear 3 Instant The water colour Dissolve Solution coffee change into brown 4 Sand The sand sink Not dissolve Mixture 5 Flour After a while the flour Not dissolve Mixture sink again 6 Red syrup The water colour Dissolve Solution change into red 7 Baking There is bubles Not dissolve (the Mixture Powder produced and the bubbles show reaction powder sink that produce gas)
- 4. Tools for separating mixture 1. sieves 3. colander 2. paper sieves
- 5. Ways of separation Water and sand Decanting Liquid Solids
- 6. Ways of Mixture separation Oil Water Evaporate the water
- 7. Ways of Water and salt separation Evaporate the Filtering using water paper sieve
- 8. 1. State true or false for each sentence! A. Salt will dissolve in water. ( ) B. Sugar dissolves quicker in hot water than cold water. ( ) C. When sweet tea is heated, the sugar evaporates. ( ) D. Stirring makes insoluble solids dissolve quicker. ( )
- 10. a. What can they do to make Stage A quicker? b. What substance is removed at Stage B? c. What substance remains in the evaporating dish at Stage C? d. Complete these two sentences. Choose words from the list. insoluble solvent solid soluble solution A solid dissolved in water is a ……………. A substance that can dissolve in water is ……….
- 11. Which student has the correct answer to the teacher’s question? Choose from student A, B, C or D.
- 12. A. What has happened to the salt? B. She then pours some of the solution into a basin and heats it.
- 13. When the salt solution is heated salt crystals are formed. What has happened to the water?