The Question is from neet-chemistry chemical-equilibrium , and it was created by the author P SRAVAN KUMAR

Question

The indicator used in the titration of sodium carbonate with sulphuric acid is

P SRAVAN KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
**Primary Concept**: Acid-Base Titration Indicators
**Related Topics**: Titration, pH, Acid-Base chemistry
**Prerequisites**: Understanding of acid-base titrations and the role of indicators.
## SOLUTION PATHWAY
**Given Information**:
     - Titration of sodium carbonate (a basic salt) with sulphuric acid (a strong acid).
     - The question asks for the appropriate indicator.
**Method & Steps**:
    1. Identify the type of titration: Strong acid-weak base titration
    Reasoning: Sodium carbonate is a salt of a weak acid and a strong base, hence it is a basic salt. Sulphuric acid is a strong acid. This is a strong acid-weak base titration
    2. Recall the appropriate pH range for the titration endpoint: The endpoint of such a titration occurs in the acidic range.
    3. Select the indicator that changes color in the acidic range: Methyl orange changes color in the acidic pH range.
**Result**: Methyl orange is the correct indicator for this titration.
## OPTION ANALYSIS
[A] :x: Potassium ferrocyanide is not an acid-base indicator.
[B] :x: Potassium ferricyanide is not an acid-base indicator.
[C] ✓: Methyl orange is a suitable indicator for a strong acid-weak base titration.
[D] :x: Phenolphthalein is a suitable indicator for a strong base-weak acid titration, and changes color in the basic pH range.
## LEARNING AIDS
**Common Mistakes**:
    1. Confusing indicators: Remembering the pH ranges for different indicators is crucial.
    2. Incorrectly identifying the type of titration: The nature of the acid and base determines the appropriate indicator.
**Quick Tips**:
    1. Memorize common indicators and their pH ranges.
    2. Understand the pH at the equivalence point of different titration types.

P SRAVAN KUMAR · Answer

Potassium ${\rm{ferrocyanide}}$

P SRAVAN KUMAR · Answer

Potassium ${\rm{ferricyanide}}$

P SRAVAN KUMAR · Answer

The correct Option is "Methyl orange"

P SRAVAN KUMAR · Answer

Phenolphthalein

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