why insoluble bases do not affect indicators?
Answers
Explanation:
These are two question, the answers are "yeah" and "nope".
The reason why I don't write "yes" and "no" is because both questions can be interpreted in different ways, and therefore the answers are slightly uncertain.
Litmus tests the pH in aqueous solutions. Whether these solutions became basic or acidic because of alkali bases or organic bases or anything else does not matter. The reserve I have with this answer is that you can actually not test any base itself, only a solution can be tested with litmus.
Dry compounds can not be tested for pH. Think about the definition of pH: negative logarithm of the H+ concentration. What is the H+ concentration in your solid? Furthermore, if you're doing the testing with a chemical indicator, the indicator itself needs to react with the free H+, and it does so in (water) solution and not in poorly mixed solid state reactions. The reserve I have with this question is that you now do not explicitly ask for a pH indicator, and I'm sure many dry compounds can be tested with all kinds of other indicators for a whole range of properties. Furthermore this question is asked in the negative
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