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Unit 2-JAMP

Pure Substances and Mixtures

QuestionAnswer
Matter •Has mass (g, kg). •Takes up space or volume (mL,L or cm3, m3). •EVERYTHING AROUND US.
Mixture •Made up of 2 or more substances. •Can be made up in different ways (ie. different concentrations, or combinations), therefore, a mixture does not have fixed chemical composition, or a chemical formula.
Heterogeneous •Heterogeneous is an adjective that describes substances or materials. •means not the same throughout. •Usually more than 1 visible phase is obvious with the naked eye (without a magnifier
Solutions •Homogeneous mixtures. •Made up of a solute and solvent. •Solute dissolves into the solvent. •Solutions can be made up of solids, liquids and gases. •A solution of metals is called an alloy (brass is copper and zinc; steel is iron, chromium and nickel
Homogeneous •Homogeneous is an adjective that describes substances or materials. •means the same throughout – same composition and concentration – uniform appearance. •One visible phase is seen with the naked eye (without a magnifier). No visible “bits” or layers
Pure Substances •Are compounds or elements. •Are truly homogenous - with the same composition and concentration throughout. •Have one visible phase. •Can be described with a chemical formula and has a fixed ratio of elements. •Properties of pure substances do not var
Compounds •Made up of 2 or more elements bonded together to make a molecule. •Compounds of the same substance have the same chemical formula and the same chemical composition. For example, water is always H2O – 2 hydrogen atoms bonded to 1 oxygen atom. •Examples:
Elements •Made up of atoms. •One visible phase – the same composition and concentration throughout. •Elements can be found on the periodic table. •Atoms are the building blocks of matter. •Examples: iodine crystal – I, iron – Fe, H – hydrogen, C – carbon.
Solid •A state of matter • Definite shape •Definite volume •Particles are very close together •Particles stay in the same position but rotate a litt
Liquid a state of matter with a definite volume, but no definite Shape; a liquid takes the shape of the container
Gas a state of matter that does not have a definite shape; a gas takes the shape and volume of the container.
Plasma the fourth state of matter. A gas is the electirically charged mainly in stars and nebulas in outer space. does not have definte shape or volume.
Particle theory theory based on the idea of all matter is made of particales.
Mechanical Mixture a mixture with a different parts that you can see
Change of State going from liguide to gas then solid
Solute the smaller part of the soluition that dissolvesin the solvent.
Solvent The larger part of the solution in to which the solutes dissolves.
Types of Solutions solution are liquide on solide or gas mixed togther to make something.
Solubility a measure of how much solute can dissolve in certain solvent to form a saturated solution at a particular temerature and volume.
Factors that Affect Solubility Temperture. crushing soilds, stirring the solution.
Created by: jpolito
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