4.1.1: Photosynthetic reaction
Not started yet — this one needs some love.
Photosynthesis is represented by: carbon dioxide + water → glucose + oxygen.
Chemical equation: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.
Photosynthesis is an endothermic reaction in which energy is transferred from the environment to the chloroplasts by light.
The chemical symbols are CO₂, H₂O, O₂ and C₆H₁₂O₆.
Common exam mistakes
Do not say photosynthesis makes, creates or produces energy; energy is transferred by light.
Do not put carbon dioxide or water on the product side of the equation.
Do not confuse photosynthesis with respiration; photosynthesis uses carbon dioxide and produces oxygen.
In symbol equations, keep the formulae precise: CO₂, H₂O, O₂ and C₆H₁₂O₆.
Do NOT write CO2, CO² or Co2 for carbon dioxide; the 2 must be a small subscript: CO₂. Use subscripts in H₂O, O₂ and C₆H₁₂O₆ too.