Red litmus paper is used to test for basicity. If it is exposed to a basic solution, it will turn blue. In contrast, it remains red in acidic solutions.
Here's how each solution would affect red litmus paper:
- Soap: Soap is typically basic, so it would turn red litmus paper blue.
- Vinegar: Vinegar is acidic (contains acetic acid), so the red litmus paper would remain red.
- Lemon Juice: Lemon juice is also acidic (contains citric acid), so the red litmus paper would remain red.
- Antifreeze: Antifreeze (ethylene glycol) is typically neutral to slightly acidic, depending on the formulation. It would likely not cause a color change in the red litmus paper.
The conclusion is that soap would result in a color change of the red litmus paper.
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