Question

Identify whether each species functions as a Brønsted-Lowry acid or a Brønsted- Lowry base in this net ionic equation. 

In this reaction: 

The formula for the conjugate _______  of H2SO3 is _______ 

The formula for the conjugate _______ of HCO3- is _______ 

Compare the conjugate bases of these three acids. 

Acid 1: hypochlorous acid, HCIO 

Acid 2: sulfurous acid, H2SO3 

Acid 3: hydrogen carbonate , HCO3- What is the formula for the weakest conjugate base? _______ 

Answer 1

According to the bronsted Lowry acid base concept.

An acid is the proton donar. While a base is a proton acceptor.

In the given problem,

H2SO3 donates a proton , therefore it is an acid. While , HCO3- accept a proton ,so it is base. in the right hand side of the equation, HSO3- is base because it accepts a proton while ,H2CO3 is an acid because it donates proton.

The formula for the conjugate base of H2SO3 will be HSO3- . BECAUSE H2SO3 is an acid itself therefore it will donate a proton to generate it's conjugate base.

the formula for the conjugate Acid of HCO3-( base, because it will accept proton to generate it's conjugate acid) will be H2CO3.Coming on to the next problem.

we have to find the weakest conjugate base.

we should know that, The stronger the acid , more weaker will be it's conjugate base and vice versa.

Therefore among , HOCl, H2SO3- ,HCO3-,

the most strongest acid is , H2SO3- ,

To find it's conjugate base , when it donates a proton it converts into HSO3-. Which is the conjugate base of H2SO3-.

Therefore,

the formula for weakest conjugate base= HSO3-.

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