question archive PART A What is the pH of an aqueous solution with [H3O+] = 4×10?13M ? PART B: Carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid

PART A What is the pH of an aqueous solution with [H3O+] = 4×10?13M ? PART B: Carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid

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PART A What is the pH of an aqueous solution with [H3O+] = 4×10?13M ?

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?

PART C:

Rank from most to least acidic. To rank items as equivalent, overlap them. pH = 10 Most acidic Least acidic

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PART A :

pH = -log[H3O+]

pH = -log[4 x 10-13M]

pH = 12.4

PART B

Molar concentration of H3O+ =10-pH

= 10-3.120

Molar concentration of H3O+ = 7.6 x 10-4

PART C

pH = -log[H3O+] = -log[10-2]= 2

pH = -log[H3O+] = -log[10-4]= 4

Therefore the order is

Most acidic

[H3O+] = 10-2

pH = 3

pH = 3.5

[H3O+] = 10-4

Least Acidic

pH =10 is basic

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