Identify the acid/conjugate base and base/conjugate acid pairs for the following reactions
H2CO3(aq) + H2O(l) <===> H3O+(aq) + HCO3
-(aq)
C5H5N(aq) + H2O(l) <===> C5H5NH+(aq) + OH-(aq
H2CO3(aq) + H2O(l) <===> H3O+(aq) + HCO3
H2O accepted a proton to become (H3O^+; therefore it must be the base and H3O^+ the conjugate acid.
H2CO3 gave a H away to H2O, therefore, H2CO3 must be the acid in this reaction and HCO3^- must be the conjugate base (what's left of the acid is the base).
Alright, let's break this down with a little humor!
For the first reaction:
Acid: H2CO3 (aqueous) is like a carbonated joke - it can fizz, but it's not in its most stable state. So, H2CO3 is our acid.
Conjugate Base: HCO3- (aqueous) is like a CO3 molecule hanging out with its friends, just one less H atom. So, HCO3- is our conjugate base.
Now for the second reaction:
Base: C5H5N (aqueous) is like a nitrogen molecule looking for a little excitement. It's ready to grab a proton like a ninja! So, C5H5N is our base.
Conjugate Acid: C5H5NH+ (aqueous) is like the proton-grabbing version of C5H5N - it's got its hands on a hydrogen! So, C5H5NH+ is our conjugate acid.
I hope this helps clarify the acid/base pairs for you! Remember, chemistry can be a little clowny sometimes.
For the first reaction:
Acid: H2CO3(aq)
Conjugate Base: HCO3-(aq)
Base: H2O(l)
Conjugate Acid: H3O+(aq)
For the second reaction:
Acid: C5H5N(aq)
Conjugate Base: C5H5NH+(aq)
Base: H2O(l)
Conjugate Acid: OH-(aq)
To identify the acid/conjugate base and base/conjugate acid pairs in a chemical reaction, you need to recognize which substances donate or accept protons (H+ ions).
Let's examine the given reactions:
1. H2CO3(aq) + H2O(l) <===> H3O+(aq) + HCO3-(aq)
In this reaction, H2CO3 donates a proton (H+) to H2O and becomes its conjugate base, HCO3-. H2CO3 is the acid, and HCO3- is its conjugate base. On the other hand, H2O accepts the proton and becomes hydronium ion, H3O+. H2O is the base, and H3O+ is its conjugate acid.
Acid: H2CO3
Conjugate base: HCO3-
Base: H2O
Conjugate acid: H3O+
2. C5H5N(aq) + H2O(l) <===> C5H5NH+(aq) + OH-(aq)
In this reaction, C5H5N donates a proton (H+) to H2O and becomes its conjugate base, C5H5NH+. C5H5N is the acid, and C5H5NH+ is its conjugate base. Conversely, H2O accepts the proton and becomes hydroxide ion, OH-. H2O is the base, and OH- is its conjugate acid.
Acid: C5H5N
Conjugate base: C5H5NH+
Base: H2O
Conjugate acid: OH-
To summarize:
Reaction 1:
Acid: H2CO3
Conjugate base: HCO3-
Base: H2O
Conjugate acid: H3O+
Reaction 2:
Acid: C5H5N
Conjugate base: C5H5NH+
Base: H2O
Conjugate acid: OH-