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Science · Grade 10

Equilibrium, Acids and Bases

Learners discover that many reactions run in both directions and settle into a dynamic equilibrium, and they predict how equilibria respond to changes using Le Chatelier's principle. They then define acids and bases by proton transfer, connect pH to hydrogen-ion concentration on a logarithmic scale, balance neutralisation equations and calculate unknown concentrations from titration data.

  • 4 lessons
  • About 120 minutes
  • Equilibrium and acids check: 10 questions
  • Ways to answer: balance equations, choose an answer, match pairs, type a number, place on a number line and put in order
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What learners will discover

  • Describe dynamic equilibrium in reversible reactions and use Le Chatelier's principle to predict the effect of changing concentration, pressure, temperature or adding a catalyst.
  • Identify acids, bases and conjugate pairs using the Arrhenius and Brønsted–Lowry definitions.
  • Relate pH to hydrogen-ion concentration on a logarithmic scale and distinguish strong from weak acids.
  • Balance neutralisation equations and calculate an unknown concentration from titration data.

Lessons

  1. Dynamic equilibrium and Le Chatelier's principle 7 steps3 practiceabout 32 min
  2. What makes an acid or a base 5 steps3 practiceabout 26 min
  3. The pH scale 6 steps4 practiceabout 30 min
  4. Neutralisation and titration 7 steps5 practiceabout 32 min
  5. Equilibrium and acids check 10 questions at the end

Keep exploring

More 10th grade science

Guide for grown-ups