Photosynthesis Worksheets - Free Printable

Problem Description:

The task involves writing the word equation and the balanced chemical equation for photosynthesis. Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy stored in glucose, using carbon dioxide and water.

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Solution:

#### Part A: Write the Word Equation
The word equation for photosynthesis describes the reactants and products in simple terms without using chemical formulas. Here's how it is written:

- Reactants: Carbon dioxide (CO₂) and Water (H₂O)
- Products: Glucose (C₆H₁₂O₆) and Oxygen (O₂)

The word equation is:

$$
\text{Carbon dioxide} + \text{Water} \xrightarrow{\text{Light energy}} \text{Glucose} + \text{Oxygen}
$$

So, filling in the blanks:

| Reactant 1 | + | Reactant 2 | → | Product 1 | + | Product 2 |
|------------|---|------------|---|-----------|---|-----------|
| Carbon dioxide | + | Water | → | Glucose | + | Oxygen |

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#### Part B: Write the Balanced Chemical Equation
The chemical equation for photosynthesis uses chemical formulas to represent the reactants and products. The balanced equation ensures that the number of atoms of each element is the same on both sides of the equation.

1. Reactants:
- Carbon dioxide (CO₂)
- Water (H₂O)

2. Products:
- Glucose (C₆H₁₂O₆)
- Oxygen (O₂)

The unbalanced equation is:

$$
\text{CO}_2 + \text{H}_2\text{O} \rightarrow \text{C}_6\text{H}_{12}\text{O}_6 + \text{O}_2
$$

To balance this equation:
- Start with glucose (C₆H₁₂O₆). It contains 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.
- On the left side, we need 6 CO₂ molecules to provide 6 carbon atoms and 12 oxygen atoms.
- We also need 6 H₂O molecules to provide 12 hydrogen atoms and 6 additional oxygen atoms.
- This gives us a total of 12 oxygen atoms on the left side (from 6 CO₂ and 6 H₂O).
- On the right side, we have 6 oxygen atoms in glucose and need 6 more to balance the equation, which comes from 6 O₂ molecules.

The balanced chemical equation is:

$$
6\text{CO}_2 + 6\text{H}_2\text{O} \xrightarrow{\text{Light energy}} \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2
$$

So, filling in the blanks:

| Reactant 1 | + | Reactant 2 | → | Product 1 | + | Product 2 |
|------------|---|------------|---|-----------|---|-----------|
| \(6\text{CO}_2\) | + | \(6\text{H}_2\text{O}\) | → | \(\text{C}_6\text{H}_{12}\text{O}_6\) | + | \(6\text{O}_2\) |

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Final Answer:

$$
\boxed{
\text{A) Carbon dioxide + Water} \xrightarrow{\text{Light energy}} \text{Glucose + Oxygen}
}
$$
$$
\boxed{
\text{B) } 6\text{CO}_2 + 6\text{H}_2\text{O} \xrightarrow{\text{Light energy}} \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2
}
$$