What color does universal indicator show at pH 5?

Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

What color does universal indicator show at pH 5?

Explanation:
Universal indicator uses a blend of dyes that change color as the hydrogen ion concentration changes. As solutions become more acidic (lower pH), the color shifts toward red; as they become more basic (higher pH), it shifts toward blue or purple. At pH 5, the solution is mildly acidic, so the color sits in the orange to yellow range. This is why orange or yellow is the correct color for pH 5. Red would indicate stronger acidity, while blue or purple would indicate basic conditions.

Universal indicator uses a blend of dyes that change color as the hydrogen ion concentration changes. As solutions become more acidic (lower pH), the color shifts toward red; as they become more basic (higher pH), it shifts toward blue or purple. At pH 5, the solution is mildly acidic, so the color sits in the orange to yellow range. This is why orange or yellow is the correct color for pH 5. Red would indicate stronger acidity, while blue or purple would indicate basic conditions.

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy