20 or 15 points
four different solutions (i, ii, iii, and iv) are labeled on the ph scale below. why would solution iv be considered the most concentrated base out of the four substances? it has the highest concentration of hydrogen ions. it has the highest concentration of hydronium ions. it has the highest concentration of oxide ions. it has the highest concentration of hydroxide ions.

D.

Explanation:

It has the highest concentration of hydroxide ions, i took this last year for physical science.

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.