Question:medium
The pH of an aqueous solution of a salt is 9. The types of acid and base from which this salt is formed are:
The pH of an aqueous solution of a salt is 9. The types of acid and base from which this salt is formed are:
Updated On: Feb 6, 2026
- weak acid and weak base
- weak acid and strong base
- strong acid and weak base
- strong acid and strong base
Show Solution
The Correct Option is B
Solution and Explanation
Step 1: Understanding pH and Salt Formation:
Solution pH reflects acidity or alkalinity; a pH of 9 indicates slight alkalinity (basic). Salts form from acid-base reactions, with the resulting salt solution's pH dependent on the reactants' strengths.
Step 2: Salt Nature Identification:
- Strong acid + Strong base salt: Neutral pH (~7).
- Strong acid + Weak base salt: Acidic pH (< 7).
- Weak acid + Strong base salt: Basic pH (> 7).
A pH of 9 (slightly alkaline) signifies the salt originated from a weak acid and a strong base. Sodium acetate (from acetic acid and sodium hydroxide) is an example.
Step 3: Conclusion:
The salt is derived from a weak acid and a strong base, evidenced by the pH of 9. This is characteristic of salts formed from weak acids and strong bases dissolved in water.
Solution pH reflects acidity or alkalinity; a pH of 9 indicates slight alkalinity (basic). Salts form from acid-base reactions, with the resulting salt solution's pH dependent on the reactants' strengths.
Step 2: Salt Nature Identification:
- Strong acid + Strong base salt: Neutral pH (~7).
- Strong acid + Weak base salt: Acidic pH (< 7).
- Weak acid + Strong base salt: Basic pH (> 7).
A pH of 9 (slightly alkaline) signifies the salt originated from a weak acid and a strong base. Sodium acetate (from acetic acid and sodium hydroxide) is an example.
Step 3: Conclusion:
The salt is derived from a weak acid and a strong base, evidenced by the pH of 9. This is characteristic of salts formed from weak acids and strong bases dissolved in water.
Was this answer helpful?
2
Top Questions on Acids, Bases And Salts
- Given below are a few elements: Li, K, Cs, F.
Identify the element which:
(a) has the least atomic radius.
(b) has two valence electrons.
(c) is the most electropositive.
- ICSE Class X board - 2026
- Chemistry
- Acids, Bases And Salts
- 5.6 litres of gas Z weighs 32 g at STP. What is the molecular weight and vapour density of Z?
- ICSE Class X board - 2026
- Chemistry
- Acids, Bases And Salts
- Equal volumes of ammonia gas and chlorine gas are kept in two different containers under the same conditions of temperature and pressure. Find the number of molecules contained in chlorine gas when the mass of ammonia is 34 g. (Atomic weight: Cl = 35.5, H = 1, N = 14)
- ICSE Class X board - 2026
- Chemistry
- Acids, Bases And Salts
- Assertion (A): Dilute Sulphuric acid is a stronger electrolyte than concentrated Sulphuric acid.
Reason (R): Dilute Sulphuric acid has a higher concentration of mobile ions than concentrated Sulphuric acid.- ICSE Class X board - 2026
- Chemistry
- Acids, Bases And Salts
- Want to practice more? Try solving extra ecology questions todayView All Questions
