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23 May, 01:51

Congo red is called a "pH indicator". What does this mean?

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  1. 23 May, 02:05
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    A pH indicator is able to tell what level of pH the substance is at. It can tell how acidic a substance is. If a substance has more hydrogen ions than hydroxide ions then it is acidic. If it has more hydroxide ions that hydrogen ions it is an akaline. the acidic scale is from 0 to 14. lower numbers means more acidic and higher numbers means it is an alkaline.

    Explanation:

    pH stands for potential Hydrogen.
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