Presentation on theme: "Mole Ratios in Chemical Equations LG: I can predict the amount (moles) of reactant or product used or created during a chemical reaction."— Presentation transcript:
Mole Ratios in Chemical Equations LG: I can predict the amount (moles) of reactant or product used or created during a chemical reaction
Mole Ratios Balanced chemical equations indicate the ratio of one chemical to another used in a reaction This ratio indicates the relative number of entities, not the mass, of each substance Example: 2 H 2(g) + O 2(g) 2 H 2 O (g)
Gimme S’more Stoichiometry! Use the recipe for S’mores to investigate the ratios of reactants and products in chemical reactions
Example The Haber process is used to manufacture ammonia, used in fertilizer, from hydrogen and nitrogen gas N 2(g) + H 2(g) NH 3 Balance the equation above to determine the mole ratio in the reaction – How many moles of hydrogen would be required to react with 6.2 mol of nitrogen gas? – If the amount of nitrogen was unlimited, how many moles of ammonia could be produced from 10.8 mol of hydrogen? – If you had 3.0mol of N 2 and 8.0mol of H 2, which substance would run out first (limiting reagent)? How much product could be made? How much excess reagent would remain after the reaction?