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Universal indicator is an aqueous solution of many indicators: methanol, propan-1-ol, phenolphthalein sodium salt, methyl red and monosodium salts of bromothymol blue and thymolblue. Most of these have a very complicated process associated with it during its manufacture.

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14y ago
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15y ago

Universal indicator is almost always a solution. You add a few drops of it to your solution, shake and look at the colour of the indicator. Generally red means acid, green means neutral and blue means alkaline.

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13y ago

I believe phenolpthalien (sp?) is a universal indicator. It turns blue for bases, and red for acids...

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13y ago

it reacts with water

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Q: How do you make a universal indicator?
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