Which of the following substances would you expect to dissolve in water?

Question

Which of the following substances would you expect to dissolve in water?

a) K2SO4

b) CH3OH

c) H3COCH3

d) C (diamond)

e) CH3CN

Answer 1

K2SO4 is an ionic compound and dissolves readily in water. Methanol (CH3OH) and Acetonitrile (CH3CN) are both polar organic molecules that readily dissolve in water.

Dimethyl ether (H3COCH3) is a small non-polar organic molecule that is soluble in water. This runs counter to like dissolves like rule you have probably been introduced to. O is very electronegative relative to C, thus each of the C molecules carries a small partial posiive charge and the O carries a partial negative charge. In that sense, it is similar to water, though not as polar.

Diamond does not dissolve in water.

I would expect a, b, c, and e to dissolve in water.

Answer 2

most group 1 ionic compounds are soluble in water, so "a" will

"b" is methanol, miscible with water due to the -OH functional group having a negative partial charge. This is also what makes sugars soluble.

dimethyl ether...hmmm... organic compound similar to methanol, but with no -OH functional group...what do you think?

diamond?? let's be serious.

e....hmmm might have to look that one up. Try a chemistry online q/a site for that one.

good luck!

Answer 3

All but the diamond.

The others are ionic or polar compunds