A solution with a pH of 11 has a [H] of:
11
1x 10-3
1x 10-11
1x 1011
1x 103

1 x 10⁻¹¹moldm⁻³

Explanation:

Given parameters:

pH of the solution  = 11

Unknown:

[H] = ?

Solution:

The hydrogen ion concentration is unknown.

From:

                      PH  = - log[H⁺]  

       So;

                     11 = -log[H⁺]

               [H⁺] = 1 x 10⁻¹¹moldm⁻³

it should be all of them because it asks if you included all of those in your answer

explanation:

the dependant variable is spilled water

the independent is the heat