February 27, 2017

Homework Help: Chemistry

Posted by anonymous on Tuesday, May 19, 2009 at 10:28am.

1. Ethanoic acid (acetic acid) is very soluble in water. However, naturally ocurring long-chain carboxylic acids such as palmitic acid (CH3(CH2)14COOH) are insoluble in water. Explain why.
My guess: Long-chain carboxylic acids have stronger relative strength of intermolecular forces between them, which made them unsoluble in water as they had strong intermolecular forces between their long carbon chains.

2. Why did the characteristics below apply to transition metals?
a. Ions vary in charge.
b. Many of their solids are colored.
c. Many are hard solids.
My guess:
a. It was because unpaired Delectrons can move to the outer energy level, such that they can form ions vary in charge.
b. No ideas.
c. They had more unpaired electrons in the d sublevel? This made their melting and boiling pionts higher and thus increase their hardness?

Thank you!

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