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As you can see, I narrowed down the choices between A and D and didn't know if the products would be ions or not.
Do dissolution reactions always yield ions? (AAMC 9 spoiler alert)
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Anyone? I feel like they always do, but just want reassurance 🙂
when it is a salt, like NH4NO3, it would.
you could have picked D or A by realizing that in order for the compound to be neutral its fragments had to have equal and opposite charges.
Also you can think of each fragment.
NH4, N would have a positive charge when bonded to 4 hydrogen atoms. You can figure this out by designating formal charges. N has 5 valence electrons - 4 electrons from bonds = +1, while the Hs have no charges. Thus, the overall fragment will have a +1 charge. (hope this makes sense)
To answer your more general question, no. Salts will, as already mentioned, but other substances that are polar (but not charged) can also dissolve in polar solvents such as water. Ethanol is a good example--it is very soluble in water but is not charged, only polar.
Thus another way to look at the problem is to notice that NH4 is not polar, therefore in order to dissolve in water it most be charged. Then you count the number of electrons and notice it's positively charged, if you didn't know that off the top of your head already.
Thus another way to look at the problem is to notice that NH4 is not polar, therefore in order to dissolve in water it most be charged. Then you count the number of electrons and notice it's positively charged, if you didn't know that off the top of your head already.
