What is the Reaction of Ethanol with Sodium?

S6-SA4-0199

Grade Level:

Class 10

AI/ML, Physics, Biotechnology, Space Technology, Chemistry, Engineering, Medicine

Definition

What is it?

The reaction of ethanol with sodium is a chemical process where ethanol (an alcohol) reacts with active sodium metal to produce sodium ethoxide and hydrogen gas. This reaction is a type of displacement reaction, showing the acidic nature of the hydrogen atom attached to oxygen in ethanol.

Simple Example

Quick Example

Imagine you have a small piece of sodium metal, like a tiny shiny pebble. If you drop it into a bottle of ethanol (which is like the alcohol used in sanitizers or some medicines), you'll see fizzing. This fizzing is hydrogen gas being released, similar to how a fizzy drink releases gas, and a new compound called sodium ethoxide forms.

Worked Example

Step-by-Step

Let's write the balanced chemical equation for the reaction of ethanol with sodium.

Step 1: Identify the reactants. Reactants are ethanol (CH3CH2OH) and sodium (Na).
---Step 2: Identify the products. When an alcohol reacts with an active metal like sodium, the hydrogen from the -OH group is displaced. This forms an alkoxide (sodium ethoxide in this case) and hydrogen gas (H2).
---Step 3: Write the unbalanced equation: CH3CH2OH + Na → CH3CH2ONa + H2.
---Step 4: Balance the hydrogen atoms. There are 2 hydrogen atoms on the product side (in H2) and 1 on the reactant side (from -OH). To balance, we need 2 molecules of ethanol and 2 molecules of sodium ethoxide, and 2 atoms of sodium.
---Step 5: Balance the sodium atoms. We now have 2 sodium atoms on the product side (in 2 CH3CH2ONa), so we need 2 sodium atoms on the reactant side.
---Step 6: Write the final balanced equation: 2CH3CH2OH + 2Na → 2CH3CH2ONa + H2.
---Answer: The balanced chemical equation is 2CH3CH2OH + 2Na → 2CH3CH2ONa + H2.

Why It Matters

Understanding this reaction is crucial for careers in chemistry and medicine, especially in drug synthesis and creating new materials. For example, pharmacists use similar reactions to create specific drug compounds, and engineers in biotechnology might use these principles to design chemical processes. It also helps us understand how different chemicals behave with metals, which is key in various industries.

Common Mistakes

MISTAKE: Students often forget to balance the hydrogen gas (H2) and write H instead of H2. | CORRECTION: Hydrogen always exists as a diatomic molecule (H2) when released, so always write H2 and balance the equation accordingly.

MISTAKE: Assuming the reaction is not vigorous or forgetting to mention hydrogen gas is released. | CORRECTION: This reaction is quite vigorous and produces hydrogen gas, which can be identified by a 'pop' sound if a burning splinter is brought near it.

MISTAKE: Confusing sodium ethoxide with sodium hydroxide. | CORRECTION: Sodium ethoxide (CH3CH2ONa) is formed when sodium reacts with ethanol. Sodium hydroxide (NaOH) is formed when sodium reacts with water.

Practice Questions

Try It Yourself

QUESTION: What gas is produced when ethanol reacts with sodium metal? | ANSWER: Hydrogen gas (H2)

QUESTION: Write the chemical formula for sodium ethoxide. | ANSWER: CH3CH2ONa

QUESTION: If 0.2 moles of ethanol react completely with sodium, how many moles of hydrogen gas will be produced? (Hint: Use the balanced chemical equation.) | ANSWER: From the balanced equation 2CH3CH2OH + 2Na → 2CH3CH2ONa + H2, 2 moles of ethanol produce 1 mole of H2. So, 0.2 moles of ethanol will produce 0.1 moles of H2.

MCQ

Quick Quiz

Which of the following is a product of the reaction between ethanol and sodium?

Sodium hydroxide

Sodium ethoxide

Water

Carbon dioxide

The Correct Answer Is:

When ethanol reacts with sodium, the hydrogen atom from the -OH group is displaced by sodium, forming sodium ethoxide (CH3CH2ONa) and releasing hydrogen gas. Sodium hydroxide and water are formed when sodium reacts with water, not ethanol.

Real World Connection

In the Real World

This reaction, while vigorous, helps us understand how alcohols behave with active metals. In chemical labs across India, chemists use similar reactions to prepare various organic compounds. For instance, in pharmaceutical companies, specific alkoxides might be formed as intermediate steps to synthesize medicines, ensuring the drug has the correct structure and properties.

Key Vocabulary

Key Terms

ETHANOL: An alcohol with the chemical formula CH3CH2OH, commonly found in alcoholic beverages and as a solvent. | SODIUM: A highly reactive alkali metal with the symbol Na. | SODIUM ETHOXIDE: The salt formed when sodium reacts with ethanol, with the formula CH3CH2ONa. | DISPLACEMENT REACTION: A chemical reaction in which one element replaces another element in a compound. | HYDROGEN GAS: A colorless, odorless, highly flammable gaseous element, H2.

What's Next

What to Learn Next

Now that you understand how ethanol reacts with sodium, you can explore other reactions of alcohols, like esterification or oxidation. These reactions will build on your knowledge of functional groups and help you understand how different organic compounds are formed and used in daily life.