2006-08-28 04:22:19 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
so you all are saying that H2O and NaCl added together, same amounts, makes a pH of 7.0....
what is the pH of NaCl alone? water?
2006-08-28 04:29:14 · update #1
maybe you should try sodium hydroxyde + hydrochloric acid, of equal concentrations
2006-08-28 04:26:08 · answer #1 · answered by Syaoran 3 · 0⤊ 1⤋
we cannot test pH for a _solid_ solute such as NaCl, we have to make a sodium chloride soln and test its pH as pH = -log[H3O+]
water could dissociate naturally into H3O+ and OH- but at a very low percentage. Both conc.s in netural water is 1E-7, hence, pH 7.
Strong monoacids and strong monobases could come together and neturalize each other. For example, 1ml 1M HCl could neturalize 2ml 0.5 M NaOH, the soln made will be pH 7, ideally.
the reality is that even ultrapure water is not pH 7 but pH 4-6 in room condition. The reason is the acidic gas such as carbon dioxide in the atomsphere dissolve in water; hence, the water appears to be acidic. If we avoid its contact with air, water/ NaCl soln will be netural.
****
I wont suggest the usage of sulfric acid and sodium hydroxide as the second proton in sulfric acid is not so ez to get off as the first proton [Or HSO4- is a weak acid but H2SO4 is a strong acid].
Common strong acids include those:
HClO4, HNO3, H2SO4 [first deprotonation], HCl, HBr, HI
2006-08-28 04:42:08 · answer #2 · answered by nickyTheKnight 3 · 0⤊ 0⤋
salt and water will give you a pH of about 7 depending on the purity of the water. NaCl is neutral and so is deionized water. if the water isn't pure to begin with you won't have a pH of 7
2006-08-28 05:59:43 · answer #3 · answered by shiara_blade 6 · 0⤊ 0⤋
Add two volumes of hydrogen gas to one volume of oxygen gas. Stand way back and add a spark. You'll get pure water (plus an explosion). The pure water has a pH of 7.
2006-08-28 09:03:16 · answer #4 · answered by af490 3 · 0⤊ 0⤋
NaOH and H2SO4 as the following reaction:
2 NaOH + H2SO4 = Na2SO4 + 2H2O
final pH will be exactly 7.
2006-08-28 04:41:37 · answer #5 · answered by aahs137 3 · 0⤊ 0⤋
If one has a high ph and the other a low one. many substances will. It's a question of proportions.
2006-08-28 04:28:50 · answer #6 · answered by Grey Bear 2 · 0⤊ 0⤋
Water and Salt.
2006-08-28 04:29:51 · answer #7 · answered by ag_iitkgp 7 · 0⤊ 0⤋
I will go with the first answer water and salt
H cl is not so common
2006-08-28 04:27:38 · answer #8 · answered by Trailbalzer 3 · 0⤊ 0⤋
How about water and table salt?
2006-08-28 04:24:55 · answer #9 · answered by Anonymous · 0⤊ 0⤋
water and alcohol
2006-08-28 06:47:26 · answer #10 · answered by tjc 2 · 0⤊ 0⤋