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Science · Grade 10

Stoichiometry and Conservation

Balanced equations become quantitative tools. Learners use mole ratios to predict amounts, carry out mass-to-mass calculations and check them against conservation of mass, decide which reactant runs out first, and compare the theoretical yield with what a real reaction produces.

  • 4 lessons
  • About 120 minutes
  • Stoichiometry check: 10 questions
  • Ways to answer: balance equations, choose an answer, draw a graph, match pairs, type a number and put in order
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What learners will discover

  • Use the mole ratios in a balanced equation to relate the amounts of any two substances in a reaction.
  • Calculate the mass of a reactant or product from a given mass, and verify the result with conservation of mass.
  • Identify the limiting reactant, and calculate the maximum product and the amount of excess reactant left over.
  • Calculate theoretical and percent yield and explain why actual yields differ from theoretical yields.

Lessons

  1. Mole ratios 6 steps4 practiceabout 25 min
  2. Mass-to-mass calculations 6 steps4 practiceabout 30 min
  3. Limiting and excess reactants 7 steps4 practiceabout 33 min
  4. Theoretical and percent yield 6 steps4 practiceabout 32 min
  5. Stoichiometry check 10 questions at the end

Keep exploring

More 10th grade science

Guide for grown-ups