a. it can act as either an acid or a base
b. its Kw varies as the temperature changes
c. [H3O+] = [OH-] for water
d. it is completely ionized in its liquid state.
2007-05-21 09:07:31 · 9 answers · asked by Meno 1 in Science & Mathematics ➔ Chemistry
c.
water doesnt have a charge becuase the concentration of hydronium ions and hydroxide ions should always be equal. This is because the ions form when H2O breaks down.
2007-05-21 09:11:15 · answer #1 · answered by Miss 2 · 0⤊ 0⤋
Pure water is neutral with a pH of 7. Water itself does not act like an acid or a base but the water molecules can dissociate into equal amounts of acidic H30+ and basic OH-(auto-ionization).
In a 1 L solution of pure water, the concentration of H30+ and OH- each are 1 X 10^-7 M. The chemical equation can be expressed as : 1(H30+)aq + 1(OH-)aq--> 2(H20)L . Because the H30+ is acid and the OH- is basic, the two react to form liquid water.
2007-05-21 09:33:45 · answer #2 · answered by jeff11559keller 1 · 0⤊ 0⤋
a is only a proof of being amphoteric (aluminium hydroxide is highly basic and amphoteric)
b. it does vary, all equilibrium values do
c. yes it proves it
d. not a chance, Kw = 10^-14 if it was completely dissociated Kw would equal 1
2007-05-21 09:24:10 · answer #3 · answered by SS4 7 · 0⤊ 0⤋
Distilled water is neutral... a ph of 7.0. Water left in the open air will absorb material in the air & most likely become acidic due to the amount of NO3 in the air... unless you live in the southwest, in which case it will become alkaline.
2007-05-21 09:15:47 · answer #4 · answered by Anonymous · 0⤊ 1⤋
A is correct, depending on what it is being introduced to
As for C - H3O+ +(plus) OH- = H2O/water
2007-05-21 09:12:44 · answer #5 · answered by Anonymous · 0⤊ 0⤋
a. is the right answer. Its pH is 7.0 and is neutral. Acids have pH less than 7.0 and alkalis have pH greater than 7.0
2007-05-21 09:14:10 · answer #6 · answered by Swamy 7 · 0⤊ 0⤋
if [H3O+] is equal to [OH-] it is called as neutral for water.
2007-05-21 09:12:15 · answer #7 · answered by Anonymous · 0⤊ 0⤋
a
2007-05-21 09:15:25 · answer #8 · answered by You have questions I have answer 2 · 0⤊ 0⤋
(a) is why it is neutral.
2007-05-21 09:10:56 · answer #9 · answered by Anonymous · 0⤊ 0⤋