Problem 103 - Chemistry Matter and Change

Question

Photosynthesis Identify the products in the following reaction that occurs in plants: Carbon dioxide and water react to produce glucose and oxygen.

Step-by-Step Solution

Answer

The products are glucose and oxygen.

Step 1: Understand Photosynthesis

Photosynthesis is a chemical process in plants where carbon dioxide and water are converted into glucose and oxygen, using sunlight as energy. The general equation is: \[ 6CO_2 + 6H_2O + light ightarrow C_6H_{12}O_6 + 6O_2 \] This tells us that plants take in carbon dioxide and water to produce glucose and oxygen.

Step 2: Identify Reactants and Products

Identify the reactants and products from the photosynthesis equation. The reactants are the substances that start the chemical reaction: carbon dioxide \( (CO_2) \) and water \( (H_2O) \). The products are the substances formed as a result of the reaction: glucose \( (C_6H_{12}O_6) \) and oxygen \( (O_2) \).

Step 3: Write the Products of the Reaction

According to the photosynthesis equation, the products are glucose \( (C_6H_{12}O_6) \) and oxygen \( (O_2) \). These are the end results of the photosynthesis process that occurs in plants.

Key Concepts

Chemical Reaction

Photosynthesis is fundamentally a chemical reaction. It is a process where substances undergo a transformation to become new substances. In this case, plants use light energy from the sun to convert carbon dioxide and water into new substances: glucose and oxygen.

This entire process takes place in the chloroplasts of plant cells. The energy from sunlight is captured by chlorophyll, a green pigment in these cells. The absorbed light energy is used to break and rearrange the molecular bonds of the reactants—carbon dioxide and water. This rearrangement leads to the formation of glucose and oxygen.

• The reactants are carbon dioxide and water.
• The products are glucose and oxygen.
• Light energy is critical for this transformation.

Chemical reactions like photosynthesis are essential for life on Earth because they allow the conversion of energy from the sun into a form that can be used by living organisms.

Glucose Formation

Glucose formation is one of the primary outcomes of photosynthesis. Glucose, a simple sugar with the formula \( C_6H_{12}O_6 \), is a critical form of energy storage in plants.

During photosynthesis, plants rearrange carbon dioxide and water molecules to synthesize glucose. Glucose serves several important roles in plants:

• It is used as an immediate energy source, fueling cellular respiration.
• It acts as a building block for more complex carbohydrates like starches and cellulose.
• It can be stored to be used later when sunlight is not available.

In essence, glucose formation provides the foundation for the plant's energy needs and growth. Without glucose, plants wouldn't have the necessary resources to develop and sustain themselves.

Oxygen Production

One of the significant benefits of the photosynthesis chemical reaction is the production of oxygen. Oxygen is released as a by-product when water molecules are split during the process.

Understanding oxygen production is crucial because:

• Oxygen is vital for the survival of most living creatures, including humans.
• It contributes to maintaining the balance of gases in the Earth's atmosphere.
• As plants produce oxygen during the daytime, it helps to replenish the oxygen consumed by respiration and combustion processes on Earth.

Through this production of oxygen, plants not only support the life of other organisms but also play a crucial role in sustaining ecosystems globally.