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Things to definitely know for your exAM 

Things to definitely know for your exAM . Periodic Trends. The names of the four we looked at How to explain at least one of your own choosing. Chemical Reactions. Classifying the main types: synthesis, single displacement, double displacement, decomposition, combustion

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Things to definitely know for your exAM 

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  1. Things to definitely know for your exAM

  2. Periodic Trends • The names of the four we looked at • How to explain at least one of your own choosing

  3. Chemical Reactions • Classifying the main types: synthesis, single displacement, double displacement, decomposition, combustion • Creating them given a word equation • How to use solubility rules • How to determine the products given the reactants only – ESPECIALLY double displacement!

  4. Mass-Mole-Particle Conversions • These need to be second nature! m-n-p • Calculations for molar mass, converting moles to mass, mass to particles and back Empirical/Molecular Formulas • Calculations given percent composition • Know the difference between the two types of formula and be able to explain! Calculating Percent Composition

  5. Stoichiometry Problems • Convert mass to moles first • If given the mass of two reactants, find limiting reagent (solve for product TWICE) • Use limiting reagent to find mass of product • Use formula and given actual yield to calculate percent yield • Discuss possible errors in an experiment that can contribute to a less than 100% yield

  6. Concentration Calculations • HINT HINT: c = n/V is the most important • Know how to determine the concentration of an ion given the concentration of the entire compound

  7. Net Ionic Equations • Make a net ionic equation given reactants only – double displacement, balancing, include states, separate aqueous compounds into ions (with CHARGES), remove spectator ions

  8. Dilutions • What quantities change in a dilution? Which remain the same? (volume, concentration, moles of solute) • Calculations using c1V1 = c2V2

  9. Acids and Bases • Conjugate acid-base pairs – given the reactants only, determine the acid and base, products, and conjugate acid and base • Meaning of amphoteric • Calculating the pH of a solution (**especially review how to calculate the pH of a base!!!)

  10. Gas Relationships • How pressure, volume and temperature of gases are related (Charles’, Boyle’s and Gay-Lussac’s laws!!!) • Know the 5 assumptions of the Kinetic-Molecular Theory • Calculations, especially involving PV = nRT

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