Question

A sample of pure water has a hydronium concentration of 1.0 × 10-7 M. What is the pH of the water?

Answer 1

pH of the water would be 6.79

Answer 2

Answer:The pH of the water is 7.

Explanation;

The pH of the solution is defined as negative logarithm of $H^+$ or hydronium ions ions in the solution.

$pH=-\log[H^+]$

So, $H^+$ concentration of water = $1.0\times 10^{-7} m$

$pH=-\log[1.0\times 10^{-7}]=7$

The pH of the water is 7.