Arrhenius bases

[golgiapparatus88]

The question is simple: which of the following is an Arrhenius base?
A. HClO
B. HBrO2
C. Li2CO3
D. HNO3

The answer is C. My reasoning is that in water Li2CO3 is dissolved into 2Li+ and CO3^(2-) and then hydrated to HCO3- and OH-

I guess the easiest way to answer a question like this is to look for hydrogens? Since A,B,D all can donate a proton as soon as they are ionized in water, they are considered Arrhenius acids. Correct?

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[loveoforganic]

That's correct. However, just looking for hydrogens is not going to lead you to the right answer all the time - ch3Li is a very strong base. You have to be able to recgnize acids and bases