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Date: 30-1-2017
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How dissolving happens
Why do some things dissolve in one solvent and not another? For example, oil and water don’t mix to form a solution, but oil does dissolve in gasoline.
There’s a general rule of solubility that says like-dissolves-like in regards to polarity of both the solvent and solutes. A polar material is composed of covalent bonds with a positive and negative end of the molecule. (For a rousing discussion of water and its polar covalent bonds. A polar substance such as water dissolves polar solutes, such as salts and alcohols. Oil, however, is composed of largely nonpolar bonds, so water doesn’t act as a suitable solvent for oil.
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بكل عزيمة ونشاط.. كيف يمكن للطلبة مواجهة الامتحانات؟
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المجمع العلمي يُصدِر الكتاب الخامس من سلسلة (علماؤنا السابقون)
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