Using the table of relative acid/base strengths from your PowerPoint notes (post
ID: 498101 • Letter: U
Question
Using the table of relative acid/base strengths from your PowerPoint notes (posted in Course Resources if you haven't already printed them out), select every reaction that is expected to favor the products.
NH4+ + HCO3- <--> NH3 + H2CO3
PO4-3 + H2PO4- <--> 2 HPO4-2
HSO4- + F - <--> SO4-2 + HF
H - + OH - <--> H2 + O-2
HNO3 + HSO4- <--> H2SO4 + NO3-
NH4+ + HCO3- <--> NH3 + H2CO3
PO4-3 + H2PO4- <--> 2 HPO4-2
HSO4- + F - <--> SO4-2 + HF
H - + OH - <--> H2 + O-2
HNO3 + HSO4- <--> H2SO4 + NO3-
Explanation / Answer
We know that if the acid is weak then its conjugate base is strong and vice versa
Similarly with the base also
(1) NH4+ + HCO3- <--> NH3 + H2CO3
The above reaction is favor since NH4+ is strong acid & HCO3- strong base
(2) PO4-3 + H2PO4- <--> 2 HPO4-2
Here PO4-3 & H2PO4- both are strong bases so it is not-favor
(3) HSO4- + F - <--> SO4-2 + HF
HSO4- is a weak base & F - is strong base so reaction is not-favor
(4) H - + OH- <--> H2 + O-2
On combination it produces H2O , so it is also not favor
(5) HNO3 + HSO4- <--> H2SO4 + NO3-
HNO3 strong acid & HSO4- is weak base so it is favor
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