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Unit 4

Emma is cooler than you

TermDefinition
Solubility the ability of a substance to be dissolved
Acids Substances that can donate a hydrogen ion to another substance
Bases Substances that can except a hydrogen or hydroxide ions in solutions
pH Measurements of the concentration of H+ ions related to the power of concentration
Matter can be either a pure substance or a mixture
Pure substance has a composition that is the same throughout and does not vary can be either a element or a compound
Mixture a blend of two or more kinds of matter
Heterogeneous mixture are not uniform throughout
Homogeneous mixture are uniform in composition (also called solutions)
Solvent a dissolving medium in a solution (ex. water)
Solute the substance being dissolved (ex. sugar)
Neutral Substances Have a pH of 7
pOH measurement of concentration of OH- ions
Electrolytes solutions that conduct electricity because of the free movement of ions
Buffers help prevent a change in pH or pOH
Mole refers to a measurement of molecules that is relative to its molecular weight
Molarity term for telling how many moles of a substance are DISSOLVED in a solution (usually water)
Electrolyte substance that DISSOLVES IN WATER to create a solution that CONDUCTS ELLECTRIC CURRENT
non- electrolyte substance that dissolves in water but DOESNT CONDUCT AN ELECTRIC CURRENT
Alloys solid solutions in which the atoms of two or more metals are uniformly mixed (ex. brass;silver)
Suspensions mixtures in which particles of a material are more or less evenly dispersed throughout a liquid or gas (ex. muddy water)
Colloids particles that are immediate in size between those in solutions and suspensions form mixtures
Tyndall effect Colloids appear homogeneous but can scatter light. Can be used to distinguish between a colloid and a solution If you see light beams, its a colloid If you don't, its a solution
Brownian Motion individual particles of a colloid can be detected under a microscope if a bright light is cast one the specimen at a right angle. due to collisions of rapidly moving molecules
Solution Equilibrium is reached when the physical state in which the opposing process of dissolution and crystallization of a solute occurs at equal rates
Insolubility inability of one solution to dissolve in another substance
Saturated solution that contains the MAXIMUM AMOUNT of dissolved solute is described as a saturated solution
Unsaturated contains less solute then a saturated solution
Supersaturated contains more dissolved solute then a saturated solution
Created by: Gr9