ISAT Preparation Chemistry Mixtures, Physical, and Chemical Changes Vocabulary Pure substanceSolute MixtureSolvent ConcentrationDiluteSaturatedSupersaturated Physical Change Chemical Change Chemistry Pure Substance matter that consists of only one type of atom or the same molecule Ex. Water, salt, copper, gold, chocolate Mixture a combination of two or more substances that can be physically separated Chemistry Chemistry Solute Substance dissolved in a solution Solvent a solid, liquid, or a gas that dissolves the solute Concentration measure of how much solute there is in a solution Chemistry Chemistry Dilute a less concentrated solution -contains less solute Saturated a solution that has as much solute as it can hold Supersaturated a solution that has too much solute and a high concentration Chemistry Chemistry 1.Do you think steel is a pure substance? 2.What is a key feature that would make salt water a mixture? 3.How can I make a mixture supersaturated? 4.What is a good example of a dilute solution? Chemistry Mixture Madness Materials: Beaker, Salt, Water, Triple Beam Balance, Spoon Measure mass of one spoonful of salt Pour 50 mL of water into beaker. Stir water and slowly put a little of the salt in the water until it cant hold any more. Measure the remaining salt that is left. Starting mass of salt remaining salt = amount of salt that the water can hold. Try again with hot water