Answer:
The conjugate acid of CH3CH2O- is CH3CH2OH.
Explanation:
I can get the conjugate acid of any base by simply adding a proton to it. Usually, if i have the specie, CH3CH2O-, I will try to write the acid - base reaction.
This acid - base reaction occur as follows; CH3CH2OH + :B ⇄ HB + CH3CH2O-. Note that the specie :B refers to a base.
It is easy to see that I obtained the base CH3CH2O- by removing a proton from CH3CH2OH.
It then follows that CH3CH2OH is the conjugate acid of CH3CH2O-.
