Part A
What is the pH of an aqueous solution with [H3O+]=2×10−14
M?
Express the pH numerically using one decimal place.
|
|
Part B
Carbonated cola is more acidic than coffee or even orange juice
because cola contains phosphoric acid.
What is the molar concentration of H3O+ in a cola that has a pH
of 3.120?
Express the molar concentration numerically using three
significant figures.
Answer
Part A :
[H3O+]=2×10^−14 M
pH = – log [H3O+] = -log (2×10^−14 )
= 13.7
pH = 13.7
Part B)
pH = 3.120
[H3O+] = 10^-pH = 10^-3.120
= 7.59 x 10^-4 M
[H3O+] = 7.59 x 10^-4 M
![What is the pH of an aqueous solution with [H3O+] = 2×10−14M ?
Express the pH numerically using one decimal place.?](https://nethercraft.net/wp-content/plugins/contextual-related-posts/default.png "What is the pH of an aqueous solution with [H3O+] = 2×10−14M ?
Express the pH numerically using one decimal place.?")
![Calculate [h3o+] and [oh−] for each of the following solutions at 25 ∘c given the ph.](https://nethercraft.net/wp-content/uploads/2022/10/Calculate-h3o-and-oh−-for-each-of-the-following-solutions.png "Calculate [h3o+] and [oh−] for each of the following solutions at 25 ∘c given the ph.")