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| style="height:20px; width:200px; text-align:center;" |When blue '''litmus''' is placed in an [[acid]] it turns red.
| style="height:20px; width:200px; text-align:center;" |When blue '''litmus''' is placed in an [[alkali]] it stays blue.
| style="height:20px; width:200px; text-align:center;" |When blue '''litmus''' is placed in a [[Neutral (Chemistry)|neutral]] [[solution]] it stays blue.
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