ChemistryChapter 18: Alcohol
Acidity (weak) — Na Metal
2ROH + 2Na -> 2RONa + H2.
Learning objectives
- Define na metal using accurate chemistry terms.
- Explain why na metal matters within acidity (weak).
- Apply the learning unit to an FBISE-style example, comparison, diagram, or calculation.
Definition
2ROH + 2Na -> 2RONa + H2. Alkoxide is a strong base (named). Safety: Na and alcohols — teacher demo, not a home experiment. Phenol more acidic than aliphatic alcohol — resonance stabilised phenoxide named. This page separates the idea from the wider topic “ACIDITY (WEAK)” so it can be revised and assessed on its own.
Important terms
- Na METAL
- 2ROH + 2Na -> 2RONa + H2.
- ACIDITY (WEAK)
- Alcohols are very weak acids (weaker than water in some comparisons, book-dependent).
Overview
Study this learning unit in three steps:
Key Idea
2ROH + 2Na -> 2RONa + H2. Alkoxide is a strong base (named). Safety: Na and alcohols — teacher demo, not a home experiment. Phenol more acidic than aliphatic alcohol — resonance stabilised phenoxide named.
Examples Alkoxide named · Strong base · Not a carbonate fizz
Exam Application
Exam tell alcohol vs acid: carboxylic acid + carbonate -> CO2 alcohol + carbonate -> no CO2 both may have OH in the formula, different groups
Examples Alkoxide named · Strong base · Not a carbonate fizz
WHAT — ACIDITY (WEAK) — NA METAL
2ROH + 2Na -> 2RONa + H2. Alkoxide is a strong base (named). Safety: Na and alcohols — teacher demo, not a home experiment. Phenol more acidic than aliphatic alcohol — resonance stabilised phenoxide named. This page separates the idea from the wider topic “ACIDITY (WEAK)” so it can be revised and assessed on its own.
WHY — Why this topic matters
ACIDITY (WEAK) — NA METAL is an independent FBISE learning unit because students must use its definitions, conditions, equations, or trends separately in explanations and calculations.
HOW — How it works
2ROH + 2Na -> 2RONa + H2. Alkoxide is a strong base (named). Safety: Na and alcohols — teacher demo, not a home experiment. Phenol more acidic than aliphatic alcohol — resonance stabilised phenoxide named. Examples: Alkoxide named; Strong base; Not a carbonate fizz. Exam use: Exam tell alcohol vs acid: carboxylic acid + carbonate -> CO2 alcohol + carbonate -> no CO2 both may have OH in the formula, different groups
Explanation
2ROH + 2Na -> 2RONa + H2. Alkoxide is a strong base (named). Safety: Na and alcohols — teacher demo, not a home experiment. Phenol more acidic than aliphatic alcohol — resonance stabilised phenoxide named. Examples: Alkoxide named; Strong base; Not a carbonate fizz. Exam use: Exam tell alcohol vs acid: carboxylic acid + carbonate -> CO2 alcohol + carbonate -> no CO2 both may have OH in the formula, different groups
In simple words
Federal Board Class 11 Chemistry learning unit. Easy wording; no provincial-board material added.
Key points
- H2 gas
- carbonate test
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.Acidity (weak) — Na Metal
Sticky Notes · Quick Revision
Core idea
- 2ROH + 2Na -> 2RONa + H2. Alkoxide is a strong base (named). Safety: Na and alcohols — teacher demo, not a home experiment. Phenol more acidic than aliphatic alcohol — resonance stabilised phenoxide named. This page separates the idea from the wider topic “ACIDITY (WEAK)” so it can be revised and assessed on its own.
WHAT
- 2ROH + 2Na -> 2RONa + H2.
WHY
- ACIDITY (WEAK) — NA METAL is an independent FBISE learning unit because students must use its definitions, conditions, equations, or trends separately in explanations and calculations.
HOW
- 2ROH + 2Na -> 2RONa + H2. Alkoxide is a strong base (named). Safety: Na and alcohols — teacher demo, not a home experiment. Phenol more acidic than aliphatic alcohol — resonance stabilised phenoxide named. Examples: Alkoxide named; Strong base; Not a carbonate fizz. Exam use: Exam tell alcohol vs acid: carboxylic acid + carbonate -> CO2 alcohol + carbonate -> no CO2 both may have OH in the formula, different groups
Common misconception
- Do not treat na metal as the same as every other part of acidity (weak); define this unit and use its own evidence, steps, or conditions.
FBISE exam check
- Define acidity (weak) — na metal, explain how it works, and support the answer with one relevant example.
60-second revision
- 2ROH + 2Na -> 2RONa + H2.
- Alkoxide named
- Exam link: H2 gas.
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