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13 May, 10:07

Water is a polar solvent. Which of the following will not dissolve in water?

A. table salt

B. Olive oil

C. Vinegar

D. Surgar

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Answers (1)
  1. 13 May, 11:15
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    Answer: option B. olive oil.

    Explanation.

    The general rule of thumb when you analyze the ability of a solvent to dissolve a solute is that lke dissolves like.

    That means:

    1) polar solvents dissolve ionic or polar solutes

    2) Non-polar solvents dissolve non-polar solutes

    3) Non-polar solvents do not dissolve polar and ionic solutes

    4) Polar solvents do not dissolve non-polar solutes.

    There are exceptions, but the rule is applicable in here.

    A. table salt: it is NaCl, a ionic compound, so the water which is a polar solvent will dissolve the table salt.

    B. Olive oil: the oils are non-polar organic compounds, so it will not be dissolved in a polar solvent.

    C. Vinegar: vinegar is acetic acid, which is a polar organic compound, so it will be dissolved in water.

    D. Sugar: sugar (sucrose) is a polar organic compound, so it will get dissovled in water.
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