7 Classification of Matter Pure SubstanceMatter that has only 1 set of chemical and physical properties.Example: Pure water always has the exact same chemical and physical properties under the same conditions.When is water not considered a pure substance?
8 Pure Substances Pure substances can also be divided into 2 categories: elementscompounds
9 Pure Substances Elements Substances made up of only one type of atom. - Cannot be separated by any physical OR chemical process.Examples:Carbon - CHelium - HeGold - Au
10 Pure Substances Compound Two or more elements chemically bonded together.Examples:Carbon Dioxide (CO2)Water (H2O)Salt (NaCl)Sucrose (C12H22O11)
11 Pure SubstancesCompounds have only 1 set of properties. They cannot be separated by any physical process.- Can only be separated by a chemical reaction.Water can be separated into Hydrogen and Oxygen by a process called Electrolysis.
12 MixturesMixtureTwo or more pure substances mixed together. Each substance in the mixture retains its own set of chemical and physical properties.Even though it may look different, it is still copper and zinc. Each metal retains its own properties like melting point.Example: Copper and Zinc can be mixed together to produce brass.
13 MixturesUnlike pure substances, mixtures can always be separated by physical means.How could we separate the copper and zinc back out?
14 MixturesIf a sample of sand contains iron and salt, how could you separate them from the other minerals?
15 What are the two types of mixtures? HeterogeneousHomogeneous
16 Types of Mixtures Heterogeneous mixture Uneven distribution of substances.- You can see the different parts.Examples:SandGraniteWoodMilkBlood
17 Mixtures Homogeneous Mixture Components are evenly mixed. Cannot see the parts.Salt water contains salt and water, but are mixed all the way to the atomic level, but it can still be separated by physical means.Seawater distillation plant
18 What are the types of Heterogeneous Mixtures? SuspensionsColloids
19 Heterogeneous Mixtures Suspensions Suspension: a mixture in which particles of a material are more or less evenly dispersed throughout a liquid or gasNatural orange juice contains particles of pulp.Particles in a suspension are large and settle out.Particles in a suspension may settle over time.Particles in a suspension may be filtered out.
25 Homogeneous Mixtures Homogeneous mixtures are solutions. solution: a homogeneous mixture throughout which two or more substances are uniformly dispersedsolute: in a solution, the substance that dissolves in the solventsolvent: in a solution, the substance in which the solute dissolves
27 Homogeneous Mixtures Miscible liquids mix to form solutions. Water and vinegarImmiscible liquids do not mix to form solutions.Oil and water
28 Anything that has mass and takes up space Matter
29 Heterogeneous Mixture MatterCan be separated physicallyCannot be separated physicallyMixturePure SubstanceCannot see the partsCan be separated chemicallyCan see the partsCannot be separatedHeterogeneous MixtureHomogeneous MixtureCompoundElementSolute/solventColloidSuspensionSolutionTyndall EffectParticles settle out
30 Matter Student Worksheet Fill-in the boxes with the appropriate label. Write key words next to each box to help you identify each category.Matter