Question #6615d

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↳Redirected from "An electron in a hydrogen atom drops from energy level n=5 to n=3. What is the energy transition using the Rydberg equation?"

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Answer 1 · 2017-06-13T20:06:46

Here's my explanation.

The hydrogen carbonate ion, #"HCO"_3^"-"#, does not exist by itself.

It must be paired with a positive ion such as #"Na"^"+"# or #"NH"_4^"+"#.

So, we can have compounds like #"NaHCO"_3# and #"NH"_4"HCO"_3#, and they are all solids at room temperature.

However, in aqueous solution, the ions separate from each other, as in

#"NaHCO"_3"(s)" → "Na"^"+""(aq)" + "HCO"_3^"-""(aq)"#

I suppose you would say that in this case the hydrogen carbonate ion is in an "aqueous" state.