What is the ph of a solution with [h3o+] = 7.5 x 10-9 m?

pH = 8.125

Explanation:

The pH of a solution can be defined as measure or the quantity of hydrogen ion that is present in a solution. The pH of a solution determines how acidic or basic a solution is.

In order to be able to determine the pH of a solution, the molar concentration of the Hydronium ion  [H3O+] in the solution must be known.

The pH is then calculated using the formula :

pH = - log [H3O+].

[H3O+] = 7.5 x 10⁻⁹ M

pH = - log[7.5 x 10⁻⁹M]

pH = 8.125

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

1.solid

2.carbon dioxide

3.helium