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Sagot :
Answer:
CH3OCH3
Explanation:
In order for a substance to be soluble in a solution, it has to contain similar properties (think, like dissolves like). As such, we need to look for a molecule that possesses different properties to what we are dissolving into in order to find which compound is least soluble.
The important property to look at in water is the fact that it is polar, meaning that its Lewis Dot structure is asymmetrical. As such, our answer will be a symmetrical compound, which we can determine by drawing the structure in the order it is written while disregarding any H following C:
- CH3OCH3 looks correct, as it would be drawn as COC without the H, which would be symmetrical
- CH3CHO is incorrect because it would be drawn as CCO without the H following C, which is asymmetrical
- CH3CH2OH is incorrect because it would be drawn as CCOH without the H following C, which is asymmetrical
- CH3NH2 is incorrect because it would be drawn as CNH2 without the H following C, which is asymmetrical
Since CH3OCH3 is the only symmetrical, therefore nonpolar molecule, it is not similar to water and is the least soluble.
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