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

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

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

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pH indicator Phenolphthalein (pH indicator) bel...

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

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

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Sodium sulfate (also known as sodium sulphate o...

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Sodium thiosulfate is used predominantly in dye...

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