What is [OH–] for a solution at 25°C that has [H3O+] = 2.35 × 10–3 M?

4.26x10^-12M

Explanation:

The following were obtained from the question:

[H3O+] = 2.35x10^-3M

[OH-] =?

Recall: [H3O+] x [OH-] = 1 x10^-14

2.35x10^-3 x [OH-] = 1 x10^-14

Divide both side by 2.35x10^-3

[OH-] = 1 x10^-14/2.35x10^-3

[OH-] = 4.26x10^-12M

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.