Reactants and Products worksheet - Free Printable

Let's solve the problem step by step.

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Part 1: Choose the correct word (reactant or product) for each description

We are given a table with descriptions, and we need to fill in whether each describes a reactant or a product.

| Question | Answer |
|--------|--------|
| Found on the left side of the equation. | Reactant |
| In the equation Na + Cl → NaCl, it's the NaCl molecule. | Product |
| Molecules that enter into a chemical reaction. | Reactant |
| You witness a chemical reaction. Afterwards, you see water vapor has condensed on the sides of the container. Water must be a ... | Product |
| Found on the right side of the equation. | Product |
| Molecules that decrease during a chemical reaction. | Reactant |
| In the equation Na + Cl → NaCl, it's the Na and the Cl molecules. | Reactant |
| Molecules that are formed in a chemical reaction. | Product |
| Molecules that increase during a chemical reaction. | Product |
| The statue of liberty is made of copper. Over the years it has reacted with oxygen to create a copper oxide, which is what makes it green. Copper and oxygen are examples of... | Reactant |

> ✔ Explanation:
> - Reactants are the starting substances (on the left side of the arrow), consumed during the reaction.
> - Products are the substances formed (on the right side of the arrow), created during the reaction.

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Part 2: Fill in the chemical equation using the scenario

Scenario:
Carbon monoxide (CO) and oxygen (O₂) react to form carbon dioxide (CO₂).

The unbalanced equation is:

```
CO + O₂ → CO₂
```

Now, let’s balance it:

- Left side: 1 C, 1 O from CO, and 2 O from O₂ → total 3 O atoms
- Right side: 1 C and 2 O in CO₂

So we need to balance:

→ Use 2 CO and 1 O₂ to make 2 CO₂

Balanced equation:
```
2CO + O₂ → 2CO₂
```

Now, place the correct symbols in the table:

| Reactants | Products |
|----------|---------|
| CO | O₂ | → | CO₂ |

But the table shows:

```
Reactants: CO [ ] [ ] [ ]
Products: [ ]
```

We need to drag the words and symbols into the correct spots.

From the balanced equation:
Reactants: CO and O₂
Products: CO₂

So the correct placement is:

| Reactants | Products |
|----------|---------|
| CO | + | O₂ | → | CO₂ |

> ✔ So, the blanks should be filled as:
> - First blank after CO: +
> - Second blank: O₂
> - Third blank: →
> - Fourth blank (under Products): CO₂

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✔ Final Answers:

#### Table 1: Questions & Answers

| Question | Answer |
|--------|--------|
| Found on the left side of the equation. | Reactant |
| In the equation Na + Cl → NaCl, it's the NaCl molecule. | Product |
| Molecules that enter into a chemical reaction. | Reactant |
| You witness a chemical reaction. Afterwards, you see water vapor has condensed on the sides of the container. Water must be a ... | Product |
| Found on the right side of the equation. | Product |
| Molecules that decrease during a chemical reaction. | Reactant |
| In the equation Na + Cl → NaCl, it's the Na and the Cl molecules. | Reactant |
| Molecules that are formed in a chemical reaction. | Product |
| Molecules that increase during a chemical reaction. | Product |
| The statue of liberty is made of copper. Over the years it has reacted with oxygen to create a copper oxide, which is what makes it green. Copper and oxygen are examples of... | Reactant |

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#### Formula Section:

Reactants:
- CO
- +
- O₂
- →

Products:
- CO₂

✔ So the completed formula is:

```
CO + O₂ → CO₂
```

(Note: The actual balanced version is 2CO + O₂ → 2CO₂, but since the worksheet likely expects the basic form, CO + O₂ → CO₂ is acceptable unless specified otherwise.)

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✔ Summary:

- Reactants go on the left; they are used up.
- Products go on the right; they are formed.
- In the catalytic converter example:
Reactants: CO and O₂
Product: CO₂

This helps reduce toxic emissions! 🌍💚