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Photosynthesis Formula

The synthesis of carbohydrates from CO2 and H2O with the help of external energy is known as carbon assimilation, which with the help of chlorophyll and light with subsequent evolution of oxygen is termed as photosynthesis.

Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

The overall new reaction for Photosynthesis Formula according to Ruban and Kamen (1941) is given below.

Photosynthesis is an energy transformation in which solar energy in the form of light is used to make carbohydrate molecules.

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Photosynthesis Problems

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Solved problems based on photosynthesis are given below.

Solved Examples

Question 1: Photosynthesis in plants generates sugars such as glucose (C6H12O6) and oxygen from carbon dioxide and water. How many kilograms of oxygen are produced from the photosynthesis of 330kg of carbon dioxide?
For photosynthesis the information given in the question enables us to work out the equation is unbalanced. After balancing the equation we get,

6CO2(g) + 6H2O(l) $\rightarrow$ C6H12O6(s) + 6O2(g)

In our equation 1 to 1 mole ratio of CO2 to O2

330kg CO2 $\times \frac{1000g\ CO_{2}}{1kg\ CO_{2}} \times \frac{1mol\ CO_{2}}{44.01g\ CO_{2}} \times \frac{6mol\ O_{2}}{6mol\ CO_{2}} \times \frac{32.00g\ O_{2}}{1mol\ O_{2}} \times \frac{1kg\ O_{2}}{1000g\ O_{2}}$

= 240kg O2


Question 2: Write the word equation and balanced symbol equation for photosynthesis.
The word equation for photosynthesis is

Carbon dioxide + water $\xrightarrow[chlorophyl]{light}$ glucose + oxygen

The balanced symbol equation is

6CO2 + 6H2O $\rightarrow$ C6H12O6 + 6O2


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