The ionic product of water is 1x10^-14 at 25° and 3.0x10^-14
at 40°C. Is the above process endothermic (or) exothermic?
Explain.
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3
Answer:
Exothermic
Explanation:
beacause heat is evolve
Answered by
1
Answer:
If the water is pure, then the only ions are from the decomposition of H2O, which are H+ and OH-. These must be in equal numbers because each water molecule decomposes in one of each. Thus [H+] = [OH-] and since their product is the given value of Kw = 2.92 x 10^(-14), each is equal to the square root of this:
[H+] = [OH-] = 1.71 x 10^(-7).
From this follows the pH from its definition:
pH = - log base 10 of [H+] = 6.77
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