John is still thinking, and even better, because he is starting to cool off. He
ID: 695939 • Letter: J
Question
John is still thinking, and even better, because he is starting to cool off. He is still contemplating the liquid and solid states in his glass. Why doesn’t the water just fly out of his glass?
A) He figured he was sweating so much that he was losing too much salt. So he dissolved some table salt, NaCl, in his drink. Describe the intermolecular forces that are occurring between the salt and the water molecules in his drink and explain why they occur.
B) Now that wasn’t too tasty, so he found some ethanol and he added it to his drink. Ethanol has the structure below. Describe the intermolecular forces that are occurring between the ethanol and the water molecules and why are occur.
H3C-----CH2-----OH
Explanation / Answer
a) NaCl dissolved in water will lead to dissociation of ions , so the intermolecular force that will operate is ion dipole force as water is also a polar molecule
b) ethanol and water forms hydrogen bonding ,which makes it completely soluble in water
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