Curriculum
Science — Second Preparatory
Unit 1: Matter and Energy
0/8
Unit 2: Matter and Chemical Reactions
0/6
Unit 3: Energy Flow in Photosynthesis and Respiration
0/4
Unit 4: Geological Processes
0/4
Text lesson
The Chemical Equation
The Chemical Equation
Common mistakes
Common mistakes
| Comparison aspect | Main idea | Example | Keywords |
|---|---|---|---|
| Mistake | changing subscripts to balance an equation | writing H₂O₂ instead of H₂O. Correct: change only the coefficients | changingsubscriptsbalanceequation |
| Mistake |
| — | forgettingcountoxygenatoms |
| Mistake | thinking that the coefficient multiplies only the first atom of the formula. Correct: the coefficient multiplies every atom in the formula | — | thinkingcoefficientmultipliesfirst |
| Mistake | thinking that an equation is complete as soon as the reactants and products are written. Correct: an equation is scientifically complete only when it is balanced | — | thinkingequationcompletesoon |
The Chemical Equation · 6 / 7