My PH Level before boiling was 8.57 now it's 9.33. I need to know how this happened. I only have untill Sunday for the answer. Any help would be great thanks!
2006-11-24 14:43:50 · 5 answers · asked by StarsInMyEyes 1 in Science & Mathematics ➔ Chemistry
When you boiled the water, you evaporated some of it. This increases the salt concentration in the water which alters the ph. Since it went toward the alkaline side, it probably increased the calcium salts in the water.
2006-11-24 15:26:02 · answer #1 · answered by Sophist 7 · 0⤊ 0⤋
pH is a function of temperature. The equilibrium which generates H+ from H2O only has a value of 1 x 10^-14 at 25 C.
In addition, to get an accurate reading, you need to use a pH probe that has an automatic temperature correction.
2006-11-24 22:47:56 · answer #2 · answered by TheOnlyBeldin 7 · 0⤊ 0⤋
Real simple.
Hard water from your tap contains H2CO3, a weak acid, in addition to the mild bases such as Ca(OH)2 and Mg(OH)2.
When you boil the water it decomposes the H2CO3 into water and CO2 gas, which is driven off.
This causes the water to become more basic, thus raising the pH.
2006-11-24 22:49:49 · answer #3 · answered by Alan Turing 5 · 0⤊ 0⤋
Your tap water has dissolved carbon dioxide in it. Carbon dioxide in water makes an acid. When you boil the water, you drive away the carbon dioxide. This removes the acid causing the pH to go up.
2006-11-24 23:03:57 · answer #4 · answered by Mei 2 · 0⤊ 0⤋
The pH of water is measured at room temp. Wait till it cools off. It will be nornal again. Go figure.
2006-11-24 22:49:07 · answer #5 · answered by sweetirsh 5 · 0⤊ 0⤋