Pure Substances and Mixtures PDF

Pure substances and mixtures  Pure and impure substances Pure substances have only one type of particle. Elements are examples of pure substances. We can find a list of elements on the Periodic Table. A gold ring would be an example of a pure substance.  Pure and impure substances...

Pure substances and mixtures  Pure and impure substances Pure substances have only one type of particle. Elements are examples of pure substances. We can find a list of elements on the Periodic Table. A gold ring would be an example of a pure substance.  Pure and impure substances Impure substances are a mixture of different types of particles. Mixtures can be solids mixed with other solids. Solids mixed with liquids Liquids mixed with other liquids Gases mixed with other gases Gases mixed with liquids  Mixtures The air is a mixture of different gases like nitrogen, oxygen and carbon dioxide.  Mixtures A bucket of stones and sand is a mixture of two solids Mixtures Cappuccino Mocha Blood is a mixture  A: pure: only blue single particles B: pure: only red paired particles C: pure: only triplet particles, each one is made of 1 blue and 2 red parts D: a mixture: three different types of molecule, it is a mixture of A, B and C Which of these are mixtures? B, C and G are mixtures  Separating mixtures Chemists often want to separate the different parts of a mixture. There are many different techniques which depend on the properties of the particles in the mixture including: the size of the particles, the mass of the particles, the solubility of the particles- whether they dissolve, and what their boiling point is. There are physical and chemical methods used to separate mixtures  Mixtures are physical combinations of two or more pure substances. A physical combination means substances do not change into other substances when they became part of a mixture. For example, when copper sulfate powder is added to water, a mixture (solution) of copper sulfate and water is created. The components look different, but no new substance is created.  Since they are formed by physically combining substances, mixtures can be physically separated. For example, if a copper sulfate solution is boiled, the water evaporates away and the copper sulfate powder remains.  Notes- Pure substances and Mixtures Pure substances have only one type of particle. A gold ring would be an example of a pure substance. Impure substances are a mixture of different types of particles. Mixtures can be solids, gases or liquids or combinations of particles in these different states Mixtures contain particles that can be easily separated because they are not chemically bonded together. Examples of mixtures: air, coffee, blood, brass, saltwater Draw each picture below and label it as pure or a mixture.  Notes- Pure substances and Mixtures _______ substances have only one type of particle. A gold ring would be an example of a pure substance. Impure substances are a m_______ of different types of particles. Mixtures can be solids, gases or liquids or combinations of particles in these different states Mixtures contain particles that can be easily s__________d because they are not ch__________y bonded together. Examples of mixtures: air, coffee, blood, brass, saltwater Draw each picture below and label it as pure or a mixture. Extension: work out if these are mixtures: ink, tropical juice, crude oil, mayonnaise, shampoo, milk explain your reasoning.