stoichiometry

• What is the number of particles in a mole?

  6.02*10^23
• What does molar mass represent?

  Mass of 1 mole of a substance
• How many decimal points should molar mass have?

  Two decimal points, except lead
• What does 'n' represent in chemistry?

  Moles (mol)
• What does 'm' represent in chemistry?

  Mass (g)
• What does 'v' represent in chemistry?

  Volume (L)
• What does 'M' represent in chemistry?

  Molar mass (g/mol)
• What does 'C' represent in chemistry?

  Concentration (mol/L)
• What is stoichiometry?

  Combination of writing equations and mole calculations
• What are the assumptions of reactions?

  Spontaneous, fast, quantitative, stoichiometric
• What is a spontaneous reaction?

  Happens without external influence
• What is proof that not all reactions are quantitative?

  Some reactions reach equilibrium
• What is a stoichiometric reaction?

  Simple whole number ratio of reactants and products
• How many reactions are stoichiometric?

  Almost all reactions
• What is a decomposition reaction?

  Compound breaks into elements
• What are the most common oxides in combustion reactions?

  CO2, H2O, NO2, SO2
• What happens to metals in combustion reactions?

  They become metal oxides
• What is the environment for single replacement reactions?

  Aqueous environment
• What occurs in single replacement reactions?

  Metal replaces metal, non-metal replaces non-metal
• What is the environment for double replacement reactions?

  Aqueous environment
• What happens to bonds in chemical reactions?

  Bonds are broken and formed, releasing energy
• What is the result of a metal reacting with water?

  Metal hydroxide and hydrogen gas
• What is the equation for % yield?

  % yield = experimental/predicted × 100%
• What is the equation for % difference?

  % difference = |predicted - experimental| / predicted × 100%
• What is the experimental result?

  Recovered amount from experiment
• What is the predicted amount?

  Stoichiometric amount (max amount)
• What is random error?

  Uncertainty in experiment
• What is systematic error?

  Faulty measuring device or experiment
• What is filtration?

  Collection of solid suspended in liquid
• What is the rule for measuring mass of filter paper?

  Must be measured dry
• What is a precipitate?

  Solid formed when two solutions mix
• What is a mixture in filtration?

  What will be poured through filter paper
• What is the filtrate?

  The liquid below the funnel
• Where is precipitate collected?

  In filter paper
• When should you measure the mass of filter paper containing residue?

  After the paper has dried
• What are nonionic equations?

  Compounds and elements in normal forms
• What are total ionic equations?

  Soluble ionic compounds in dissociated form
• What are net ionic equations?

  Species that change from reactants to products
• What often happens for a complete chemical reaction?

  One reactant is in excess
• What are the two types of double replacement reactions?

  • Precipitation
  • Neutralization