Litmus in an alkaline solution appears as which color?

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

Multiple Choice

Litmus in an alkaline solution appears as which color?

Explanation:
Litmus is a simple pH indicator that changes color with acidity or basicity. In basic (alkaline) solutions, the litmus dye shifts to blue, while in acidic solutions it becomes red. This color change happens because the dye’s form changes with the hydrogen ion concentration, altering its color. Neutral solutions tend to give a purple color, but for an alkaline condition the blue hue is produced. So, in an alkaline solution litmus appears blue.

Litmus is a simple pH indicator that changes color with acidity or basicity. In basic (alkaline) solutions, the litmus dye shifts to blue, while in acidic solutions it becomes red. This color change happens because the dye’s form changes with the hydrogen ion concentration, altering its color. Neutral solutions tend to give a purple color, but for an alkaline condition the blue hue is produced. So, in an alkaline solution litmus appears blue.

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