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The difference between solvent and water
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petroleum additives in oil
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A yellow liquid mixed with a blue chemical reagent, a drop of a blue solution in a flask experiment research laboratory

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22520167
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硫酸銅(II)との変位反応。 反応性が高い金属が銅を溶液から置き換えるにつれ、硫酸銅は無色に変わる

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