Calculate the (H+), and indicate whether it is an acid, base, or neutral for a
solution with a concentration of [OH-] = 8.8 x 10^-9 M.*

As the pH value is less than 7, (in this case 5,94) it corresponds to an acidic substance.

Explanation:

The pH indicates the acidity or basicity of a substance. pH values between 0 and less than 7 indicate acidic solutions, 7 neutral and higher than 7 to 14 basic. It is calculated as: pH = -log (H 30+)

First we calculate the concentration of H 30+:

Both pH and pOH have a relationship to belonging to the same aqueous solution: the expression of the Kwater (ionic product of the water Kw) is used:

(H3O  +) x (OH  -) = 1x10 ^ -14

(H3O  +) x (8.8 x 10^-9)= 1x10 ^ -14

(H30+)= 1x10 ^ -14/(8.8 x 10^-9)

(H30+)= 1,14 x 10^-6 M

pH= -log (H30+)

pH= -log (1,14 x 10^-6)

pH=5,94  As the pH value is less than 7, it corresponds to an acidic substance.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.