Chem Lab- Science Olympiad Questions and Answers Rated A+

Chem Lab- Science Olympiad Questions and Answers Rated A+ What is the formula for Molarity? moles of solute/liters of solution What is an acid? An acid is a source of hydrogen ions, H+, has a pH less than 7 Strong bases (usually salts), NaOH, KOH, Ca(OH)2, Mg(OH)2 What are physical properties? characteristics of a substance that can be observed without changing it into another substance What are examples of physical properties viscosity, conductivity, malleability, hardness, melting point, boiling point, and density What are intensive properties? properties that do not depend on the amount of matter present What are extensive properties? properties that depend on the amount of matter that is present What are examples of extensive properties? mass, length, volume, solubility What are examples of intensive properties? Conductivity Density Color Temperature Resistance Magnetism What is a base? A substance with a pH greater than 7 What is an aqueous solution? a solution in which water is the solvent Examples of aqueous solutions Saltwater, Cola, rain, acid solutions Exothermic Chemical Reaction in which energy is primarily given off in the form of heat Endothermic (of a chemical reaction or compound) occurring or formed with absorption of heat What happens when acetic acid, a weak electrolyte, dissolves in water? Hydronium ions form, The solution will conduct electricity, and most of acid remains as non ionized molecules in equilibrium with ions. The stronger the acid.... _____ the weaker its conjugate base is. The weaker the acid....._____ the stronger