pH = -log[H⁺]
pOH = -log[OH⁻]
pH + pOH = 14
[H⁺] × [OH⁻] = 10⁻¹⁴ (Kₙ)
Strong acid: completely ionized ∈ water, e.g., HCl, H₂SO₄
Weak acid: partially ionized ∈ water, e.g., CH₃COOH, H₃PO₄
Salt: ionic compound formed by reaction between acid and base
Neutralization: reaction between acid and base to form salt and water
Acid + Base → Salt + Water

🪤 The 5 Mistakes That Cost Marks

Not understanding the difference between strong and weak acids
Forgetting the formula pH + pOH = 14
Not knowing the Kₙ value (10⁻¹⁴)
Confusing acid and base with salt
Not being able to identify the type of salt formed ∈ a reaction

✏️ 3 Solved PYQs

What is the pH of a solution with [H⁺] = 10⁻⁵ M? Step 1: Use the formula pH = -log[H⁺] Step 2: Substitute the value of [H⁺] into the formula Step 3: Calculate the pH value Answer: pH = -log(10⁻⁵) = 5
A salt X is formed by the reaction between a strong acid and a weak base. What type of salt is X? Step 1: Identify the properties of strong acid and weak base Step 2: Determine the type of salt formed Answer: X is a basic salt
What is the pOH of a solution with pH = 8? Step 1: Use the formula pH + pOH = 14 Step 2: Substitute the value of pH into the formula Step 3: Calculate the pOH value Answer: pOH = 14 - pH = 14 - 8 = 6

🧠 The One Thing Most Students Get Wrong

Most students get confused between the terms acid, base, and salt, and are unable to identify the type of salt formed ∈ a reaction
To avoid this mistake, it is essential to understand the definitions and properties of acids, bases, and salts
Practice identifying the type of salt formed ∈ different reactions to build confidence

👁️ Ayush's Note

To excel ∈ acids, bases, and salts, focus on understanding the concepts and formulas
Practice solving problems and past year questions to build confidence and speed
Make a list of important formulas and reactions, and revise them regularly
Use flashcards to memorize key terms and concepts

🔁 Last 5 Minutes Box

Quick revision of important formulas: pH, pOH, Kₙ
Check the types of acids and bases: strong, weak, monoacidic, diacidic
Review the properties of salts: acidic, basic, neutral
Go through the common reactions: neutralization, hydrolysis
Recall the definitions: acid, base, salt, pH, pOH

📝 Practice MCQs

1. What is the pH of a solution with [H⁺] = 10⁻⁴ M?

A) 4

B) 6

C) 10

D) 14

Answer: A) 4. Explanation: Use the formula pH = -log[H⁺]

2. What type of salt is formed by the reaction between a strong acid and a weak base?

A) Acidic salt

B) Basic salt

C) Neutral salt

D) Normal salt

Answer: B) Basic salt. Explanation: Strong acid and weak base reaction

3. What is the pOH of a solution with pH = 9?

A) 5

B) 6

C) 14 - 9 = 5

D) 14 + 9 = 23

Answer: C) 5. Explanation: Use the formula pH + pOH = 14

4. Which of the following is a strong acid?

A) CH₃COOH

B) HCl

C) H₂O

D) NaOH

Answer: B) HCl. Explanation: Strong acid is completely ionized ∈ water

5. What is the value of Kₙ?

A) 10⁻⁷

B) 10⁻¹⁴

C) 10⁻²¹

D) 10⁻²⁸

Answer: B) 10⁻¹⁴. Explanation: Kₙ value is constant at 10⁻¹⁴

🚀 Ready to Ace Your Exam?

Put your knowledge to the test! Take the free Practice Mock Test now and track your progress against thousands of students.

🎬 Watch video explanations on YouTube →

This post was curated by Jules, Exam Compass Bot, and edited for accuracy by Ayush.

📚 Related Topics

Continue your revision with these related guides:

pH = -log[H⁺]
pOH = -log[OH⁻]
pH + pOH = 14
[H⁺] × [OH⁻] = 10⁻¹⁴ (Kₙ)
Strong acid: completely ionized ∈ water, e.g., HCl, H₂SO₄
Weak acid: partially ionized ∈ water, e.g., CH₃COOH, H₃PO₄
Salt: ionic compound formed by reaction between acid and base
Neutralization: reaction between acid and base to form salt and water
Acid + Base → Salt + Water

🪤 The 5 Mistakes That Cost Marks

Not understanding the difference between strong and weak acids
Forgetting the formula pH + pOH = 14
Not knowing the Kₙ value (10⁻¹⁴)
Confusing acid and base with salt
Not being able to identify the type of salt formed ∈ a reaction

✏️ 3 Solved PYQs

What is the pH of a solution with [H⁺] = 10⁻⁵ M? Step 1: Use the formula pH = -log[H⁺] Step 2: Substitute the value of [H⁺] into the formula Step 3: Calculate the pH value Answer: pH = -log(10⁻⁵) = 5
A salt X is formed by the reaction between a strong acid and a weak base. What type of salt is X? Step 1: Identify the properties of strong acid and weak base Step 2: Determine the type of salt formed Answer: X is a basic salt
What is the pOH of a solution with pH = 8? Step 1: Use the formula pH + pOH = 14 Step 2: Substitute the value of pH into the formula Step 3: Calculate the pOH value Answer: pOH = 14 - pH = 14 - 8 = 6

🧠 The One Thing Most Students Get Wrong

Most students get confused between the terms acid, base, and salt, and are unable to identify the type of salt formed ∈ a reaction
To avoid this mistake, it is essential to understand the definitions and properties of acids, bases, and salts
Practice identifying the type of salt formed ∈ different reactions to build confidence

👁️ Ayush's Note

To excel ∈ acids, bases, and salts, focus on understanding the concepts and formulas
Practice solving problems and past year questions to build confidence and speed
Make a list of important formulas and reactions, and revise them regularly
Use flashcards to memorize key terms and concepts

🔁 Last 5 Minutes Box

Quick revision of important formulas: pH, pOH, Kₙ
Check the types of acids and bases: strong, weak, monoacidic, diacidic
Review the properties of salts: acidic, basic, neutral
Go through the common reactions: neutralization, hydrolysis
Recall the definitions: acid, base, salt, pH, pOH

📝 Practice MCQs

1. What is the pH of a solution with [H⁺] = 10⁻⁴ M?

A) 4

B) 6

C) 10

D) 14

Answer: A) 4. Explanation: Use the formula pH = -log[H⁺]

2. What type of salt is formed by the reaction between a strong acid and a weak base?

A) Acidic salt

B) Basic salt

C) Neutral salt

D) Normal salt

Answer: B) Basic salt. Explanation: Strong acid and weak base reaction

3. What is the pOH of a solution with pH = 9?

A) 5

B) 6

C) 14 - 9 = 5

D) 14 + 9 = 23

Answer: C) 5. Explanation: Use the formula pH + pOH = 14

4. Which of the following is a strong acid?

A) CH₃COOH

B) HCl

C) H₂O

D) NaOH

Answer: B) HCl. Explanation: Strong acid is completely ionized ∈ water

5. What is the value of Kₙ?

A) 10⁻⁷

B) 10⁻¹⁴

C) 10⁻²¹

D) 10⁻²⁸

Answer: B) 10⁻¹⁴. Explanation: Kₙ value is constant at 10⁻¹⁴

🚀 Ready to Ace Your Exam?

Put your knowledge to the test! Take the free Practice Mock Test now and track your progress against thousands of students.

🎬 Watch video explanations on YouTube →

This post was curated by Jules, Exam Compass Bot, and edited for accuracy by Ayush.

📚 Related Topics

Continue your revision with these related guides: