Question

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 2.670

Answer 1

Answer : The hydronium ion concentration in an aqueous solution is,
`2.138* 10^(-3)M`

Explanation : Given,

pH = 2.670

pH : It is defined as the negative logarithm of hydronium or hydrogen ion concentration.

Formula used :

`pH=-\log [H_3O^+]`

Now put the value of pH in this formula, we get:

`2.670=-\log [H_3O^+]`

`[H_3O^+]=2.138* 10^(-3)M`

Therefore, the hydronium ion concentration in an aqueous solution is,
`2.138* 10^(-3)M`

Answer 2

The pH of a solution is a measure of the acidity of that solution. It relates to the hydrogen ion concentration present in the solution logarithmically. It is expressed as:

pH = -log [H3O+]

We calculate the hydrogen ion concentration as follows:


pH = -log [H3O+]
2.670 = -log [H3O+]
[H3O+] = 2.14x10^-3 M