Acid–Base Indicator Laboratory - Interactive Simulation

🧪 Acid–Base Indicator Virtual Laboratory

Class X Physical Science | Acids, Bases and Salts

🎯 Learning Objectives

• Identify acidic, basic and neutral solutions.
• Understand the action of acid–base indicators.
• Observe colour changes produced by different indicators.
• Relate indicator colour to the pH of a solution.
• Record observations from a virtual experiment.

🔬 Select Your Experiment

Select Test Solution 🍋 Lemon Juice 🥗 Vinegar 💧 Distilled Water 🧂 Baking Soda Solution 🧼 Soap Solution ⚗️ Hydrochloric Acid 🧪 Sodium Hydroxide

Select Indicator 🔵🔴 Litmus 🟠 Methyl Orange 💗 Phenolphthalein 🌈 Universal Indicator

⚗️ Virtual Laboratory

Test Solution

🍋 Lemon Juice

Indicator: Litmus

Observed Indicator Colour

Select an indicator and click Add Indicator.

📊 Observation Table

Test Solution	Nature	Approx. pH	Indicator	Colour
—	—	—	—	—

🌈 Indicator Colour Guide

Indicator	Acidic	Neutral	Basic
Litmus	Red	Purple	Blue
Methyl Orange	Red	Orange	Yellow
Phenolphthalein	Colourless	Colourless	Pink
Universal Indicator	Red / Orange	Green	Blue / Violet

📚 What is an Indicator?

An acid–base indicator is a substance that changes colour depending on whether a solution is acidic or basic.

📝 Student Activity

1. Select a test solution.
2. Select an indicator.
3. Click Add Indicator.
4. Observe the colour change.
5. Identify whether the solution is acidic, neutral or basic.
6. Record your observation.
7. Repeat using another indicator.

🎓 Learning Outcome

Students will be able to identify acidic, neutral and basic solutions using suitable indicators and relate indicator colour changes to the pH scale.

Interactive Virtual Chemistry Laboratory
Pallerla Surender