Is C2H5OH Ethanol Soluble or Insoluble in Water

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Is C2H5OH (Ethanol) soluble or insoluble in water? The answer is that Ethanol is soluble in water. It is polar compound which readily dissolves in water. • For alcohols, like methanol we have a small polar molecule. Since water is also polar the C2H5OH will be attracted to, and surrounded by, water molecules. For this reason Ethanol molecules will spread out in the water (dissolve) and form a homogeneous solution. • For alcohols with longer chains of carbon atoms, like CH3(CH2)9OH (Decanol) much of the molecule is nonpolar (or only very slightly polar) and the molecule will therefore be insoluble in water. But for C2H5OH , which only has one Carbon, this is not the case and it will be soluble in water. For a list of solubility of alcohols, see https://chemed.chem.purdue.edu/genche... • • For ionic compounds, unlike Ethanol, we can use these basic rules for solubility (see • Solubility Rules: Explanation Prac... ): • Salts of: • Group I elements (Li+, Na+, K+, Cs+, Rb+) are • NH4+ (Ammonium ion) are soluble. • the nitrate ion (NO3-) are generally soluble. • of Cl-, Br-, and I- are soluble. Exceptions Ag+, Pb2+, and (Hg2)2+ • most sulfates are soluble. Exceptions: Ba2+, Ca2+, Pb2+, Ag+, Sr2+ • most hydroxide salts are only slightly soluble. Exceptions: NH4+, Li+, Na+, K+ • most carbonates (CO32-) are insoluble. Exceptions: Group 1 and NH4+ • Note: Rules at the top supersede any lower rules.

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