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10 January, 21:25

An unknown substance turns blue litmus paper to red. Which additional test could be used to confirm the substance's identity?

It should turn phenolphthalein from colorless to pink because it is a base.

It should turn phenolphthalein from pink to colorless because it is a base.

It should turn methyl orange to orange because it is an acid.

It should turn methyl orange to red because it is an acid.

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  1. 10 January, 21:36
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    The right answer for the question that is being asked and shown above is that: "It should turn phenolphthalein from colorless to pink because it is a base." An unknown substance turns blue litmus paper to red. The additional test could be used to confirm the substance’s identity is that It should turn phenolphthalein from colorless to pink because it is a base.
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