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The turmeric solution will turn red by a...

The turmeric solution will turn red by an aqueous solution of

A

potassium acetate

B

copper sulphate

C

sodium sulphate

D

ferric chloride

Text Solution

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The correct Answer is:
To determine which aqueous solution will turn turmeric solution red, we need to analyze the nature of each given solution and how it interacts with turmeric. ### Step-by-Step Solution: 1. **Understand the Nature of Turmeric Solution**: - Turmeric contains a compound called curcumin, which acts as a pH indicator. It turns red in basic (alkaline) conditions and remains yellow in acidic conditions. 2. **List the Given Aqueous Solutions**: - The options provided are: - Potassium acetate (CH3COOK) - Copper sulfate (CuSO4) - Sodium sulfate (Na2SO4) - Ferric chloride (FeCl3) 3. **Analyze Each Solution**: - **Potassium Acetate (CH3COOK)**: - It is a salt formed from a weak acid (acetic acid, CH3COOH) and a strong base (potassium hydroxide, KOH). - The solution will be basic, which means it will turn turmeric red. - **Copper Sulfate (CuSO4)**: - This salt is formed from a strong acid (sulfuric acid, H2SO4) and a weak base (copper hydroxide, Cu(OH)2). - The solution will be acidic, so it will not turn turmeric red. - **Sodium Sulfate (Na2SO4)**: - This salt is formed from a strong acid (sulfuric acid, H2SO4) and a strong base (sodium hydroxide, NaOH). - The solution will be neutral, so it will not turn turmeric red. - **Ferric Chloride (FeCl3)**: - This salt is formed from a strong acid (hydrochloric acid, HCl) and a weak base (ferric hydroxide, Fe(OH)3). - The solution will be acidic, so it will not turn turmeric red. 4. **Conclusion**: - The only solution that will turn the turmeric solution red is **Potassium Acetate (CH3COOK)** because it creates a basic environment. ### Final Answer: The turmeric solution will turn red by an aqueous solution of **Potassium Acetate (CH3COOK)**. ---
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