Science Class 10
Chemical Reactions and Equations
Write a chemical change as a balanced equation, name its shape, and follow the oxygen.
13 lessons · ~102 min total
Track progress — 0 of 13 lessons read 0%
Lessons in this topic
- 0 Start here A roadmap: write a change exactly, balance the count, and name its shape. · 4 min You are here
- 1 What a new substance means A chemical reaction makes a new substance. The starting side is reactants, the new side is products. · 8 min
- 2 From words to formulae A word equation names reactants and products in words. A skeleton equation writes the same names as formulae. · 8 min
- 3 Balancing the count Atoms only rearrange in a reaction, so each kind must count the same on both sides of the arrow. · 10 min
- 4 Many become one A combination reaction joins reactants into one product. The balanced equation fixes the exact proportion. · 9 min
- 5 One becomes many A decomposition reaction splits one reactant into many products, pushed by heat, light or electricity. · 9 min
- 6 Somebody takes somebody else's place A free element can take another's place in a compound. Two compounds can also swap partners. · 9 min
- 7 Oxygen on the move Gaining oxygen is oxidation, losing it is reduction, and both happen together in one redox event. · 9 min
- 8 Slow reactions, all around Corrosion and rancidity are slow reactions with oxygen. Taking one ingredient away slows the reaction. · 9 min
- 9 Writing the swapped formulas Cross the ion charges to write each new formula. A solid that forms is a precipitate. · 9 min
- 10 Checkpoint: the shapes of reactions Six marked questions on balancing and the shapes of reactions. · 6 min
- 11 The big picture The whole chapter on one screen: write it exactly, then read its shape. · 4 min
- 12 Track quiz Ten quick questions, one or two for each lesson. Use the table if you get stuck. · 8 min
0%
Take this year's practice exam →
Draws questions from every track in this subject's year, not just this one — a Practice result, never official.