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Filter paper is a semi-permeable paper barrier pla...

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A universal indicator is a pH indicator made of a ...

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Sodium chloride /ˌsoʊdiəm ˈklɔːraɪd/, [8] commonly...

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pH indicator Phenolphthalein (pH indicator) below ...

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An alum (/ˈæləm/) is a type of chemical compound, ...

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Sodium hydroxide, also known as lye and caustic so...

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Ammonium ferrous sulfate

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Sodium sulfate (also known as sodium sulphate or s...

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