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Sodium carbonate is a basic salt because it is a salt of a
- a)strong acid and strong base
- b)weak acid and weak base
- c)strong acid and weak base
- d)weak acid and strong base
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Sodium carbonate is a basic salt because it is a salt of aa)strong aci...
Explanation:
Definition of a basic salt:
Components of sodium carbonate:
Acidic and basic properties of the ions:
Neutralization reaction:
Conclusion:
Sodium carbonate (Na2CO3) is a basic salt because it is the salt of a weak acid and a strong base. Here's why:
Definition of a basic salt:
A basic salt is a salt that is formed from the neutralization of a weak acid with a strong base. It has a pH greater than 7 and can act as a base when dissolved in water.
Components of sodium carbonate:
Sodium carbonate consists of the sodium ion (Na+) and the carbonate ion (CO3^2-).
Acidic and basic properties of the ions:
The sodium ion (Na+) is derived from a strong base (sodium hydroxide, NaOH) and is therefore neutral and does not contribute to the basic nature of the salt.
The carbonate ion (CO3^2-) is derived from a weak acid (carbonic acid, H2CO3) and a strong base (sodium hydroxide, NaOH). The carbonate ion can accept protons (H+) from water, making it a weak base.
Neutralization reaction:
When sodium carbonate reacts with water, it undergoes hydrolysis:
Na2CO3 + H2O → 2NaOH + H2CO3
The hydrolysis of the carbonate ion produces hydroxide ions (OH-) which make the solution basic.
Conclusion:
Sodium carbonate is a basic salt because it is the salt of a weak acid (carbonic acid) and a strong base (sodium hydroxide).
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Sodium carbonate is a basic salt because it is a salt of aa)strong aci...
Understanding Sodium Carbonate as a Basic Salt
Sodium carbonate (Na2CO3) is classified as a basic salt due to its origin from a weak acid and a strong base. Here’s a detailed explanation of why this is the case:
1. Composition of Sodium Carbonate
- Sodium carbonate is formed from the reaction of sodium hydroxide (a strong base) and carbonic acid (a weak acid).
- The chemical reaction can be represented as:
NaOH (strong base) + H2CO3 (weak acid) → Na2CO3 + H2O
2. Nature of Acids and Bases
- Strong Base: Sodium hydroxide completely dissociates in water, resulting in a high concentration of hydroxide ions (OH⁻). This leads to a strong alkaline solution.
- Weak Acid: Carbonic acid does not completely dissociate in water, resulting in a lower concentration of hydrogen ions (H⁺). This means it has a weaker acidic nature compared to strong acids.
3. pH of Sodium Carbonate Solution
- When sodium carbonate is dissolved in water, it hydrolyzes to form sodium ions (Na⁺) and carbonate ions (CO3²⁻).
- The carbonate ions react with water, producing hydroxide ions and increasing the pH of the solution:
CO3²⁻ + H2O ⇌ HCO3⁻ + OH⁻
- This reaction leads to a basic solution, indicating that sodium carbonate is a basic salt.
Conclusion
- Sodium carbonate is classified as a basic salt because it is derived from a weak acid (carbonic acid) and a strong base (sodium hydroxide).
- This results in a solution that exhibits basic properties, confirming that the correct answer is option 'D'.
Sodium carbonate (Na2CO3) is classified as a basic salt due to its origin from a weak acid and a strong base. Here’s a detailed explanation of why this is the case:
1. Composition of Sodium Carbonate
- Sodium carbonate is formed from the reaction of sodium hydroxide (a strong base) and carbonic acid (a weak acid).
- The chemical reaction can be represented as:
NaOH (strong base) + H2CO3 (weak acid) → Na2CO3 + H2O
2. Nature of Acids and Bases
- Strong Base: Sodium hydroxide completely dissociates in water, resulting in a high concentration of hydroxide ions (OH⁻). This leads to a strong alkaline solution.
- Weak Acid: Carbonic acid does not completely dissociate in water, resulting in a lower concentration of hydrogen ions (H⁺). This means it has a weaker acidic nature compared to strong acids.
3. pH of Sodium Carbonate Solution
- When sodium carbonate is dissolved in water, it hydrolyzes to form sodium ions (Na⁺) and carbonate ions (CO3²⁻).
- The carbonate ions react with water, producing hydroxide ions and increasing the pH of the solution:
CO3²⁻ + H2O ⇌ HCO3⁻ + OH⁻
- This reaction leads to a basic solution, indicating that sodium carbonate is a basic salt.
Conclusion
- Sodium carbonate is classified as a basic salt because it is derived from a weak acid (carbonic acid) and a strong base (sodium hydroxide).
- This results in a solution that exhibits basic properties, confirming that the correct answer is option 'D'.
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