2006-09-30 00:11:53 · 16 answers · asked by Tony H 1 in Science & Mathematics ➔ Chemistry
"Pure" water will actually absorb Carbon Dioxide from the air. This is what would make the pH slightly acidic.
It's actually more accurate to determine Pure Water's pH by measuring it's resistance.
An easy way to purge the carbon dioxide from the pure water is to bubble Nitrogen through it. The water must then be used right away because as soon as you stop purging it with Nitrogen the water will start dissolving more carbon dioxide.
2006-09-30 00:22:23 · answer #1 · answered by C K Platypus 6 · 1⤊ 0⤋
No. Neutral means equal amounts of positive and negative moieties or ions in solution. And neutral on the pH scale is 7 not 6.
2006-10-03 20:20:37 · answer #2 · answered by Aldo 5 · 0⤊ 0⤋
yes, it depends on the temperature. But at 25 degrees, water is neutral at pH 7
2006-09-30 03:49:31 · answer #3 · answered by avrod 2 · 0⤊ 0⤋
Technically, no. A pH of 6 makes it slightly acidic. pH 7 is neutral.
2006-09-30 00:33:16 · answer #4 · answered by micksmixxx 7 · 0⤊ 0⤋
well ph of water can be 6 and it can be neutral individually but exactly speaking water remains neutral at ph 7.even when the traces of some other gases are involved neutrality is not retained.
2006-10-03 17:37:41 · answer #5 · answered by madhavi l 1 · 0⤊ 0⤋
Yes. It is possible. pH = - lg [H+]. [H+] = concentration of H+
At room temperature, ie. 25 degrees celcius, the ionisation constant of water ie. Kw = 1.0 x 10^-14.
Kw = [H+][OH-] which means the constant for self-ionisation of water.
Therefore, at 25 degrees celcius, for pure water, [H+] = [OH-] = 1.0 x 10^-7 mol dm^-3. Hence pH for neutral water will be 7.
However, at a higher temperature, Kw increases.
At a certain temperature, where Kw = 1.0 x 10^-7, [H+] will be equals to 1.0 x 10^-6. And then, neutral pH will be at 6 and not 7.
2006-09-30 03:27:52 · answer #6 · answered by weijunchen88 1 · 2⤊ 0⤋
pH is a test of acidic or alkalinity of water. Water may still have lot of minerals and be ph 7. It may still be potable (good for drinking) but hav pH of 6.
What is more imp is what is the cause of pH.
By the way, a healthy water is required to have some essential minerals in it.
2006-09-30 00:24:13 · answer #7 · answered by dickwettingtown 2 · 0⤊ 0⤋
Neutral PH is 7 so not quite sure what you mean there?
2006-09-30 00:19:27 · answer #8 · answered by Stephen H 4 · 0⤊ 0⤋
most water samples have impurities, ie minerals and ions which can change waters pH.
100% Pure water in theory only cotains H+ and OH- ions and should be balanced, ie for every H+ ion there should be a counteracting OH- ion to cancel out the charge.
pH scale is 1 - 14, perfect water should be in the middle , pH of 7
2006-09-30 04:52:52 · answer #9 · answered by chef5ie 1 · 0⤊ 0⤋
Neutral pH is 7.0 not 6
2006-09-30 02:24:26 · answer #10 · answered by Anonymous · 0⤊ 0⤋