LAB 1-2 : Properties of Compounds and MIxtures
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13 terms
Terms | Definitions |
|---|---|
 what will this experiment demonstrate | difference between a mixture and a (pure) substance & the difference between molecular and ionic compounds |
| (pure) substances | elements on the periodic table or chemical combinations of elements (compound) |
| compound | combination of elements |
| How do you make or break down a compound? | chemical reactions |
| ionic compounds | electrically CHARGED particles called ions in water, they conduct electricity because of charged particles |
| electrolyte | ionic compounds in water (soluble)-can dissolve in water |
| molecular compounds | electrically NEUTRAL particles in water, they DO NOT conduct electricity because it is no neutral |
| mixture | physical combinations of two or more substances material composed of two or more elements or compounds that are physically mixed together but not chemically combined |
| purpose- | test pure water with an electrical conductivity tester to determine whether it is an ionic or molecular compound |
| aqueous solution | solution of substance dissolved in pure water |
| distillation process | boiling aqueous salt solution and then causing vapor/steam to condense by cooling it |
| condensate | collected vapor from distillation |
| how can you tell if it is a mixture or pure substance? | if vapor can be separated when cooled then = mixture if vapor cannot be separated when cooled then = pure substance |
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