What is exactly the pH value of distilled water?

1.0
7.0
10.0
It depends on the temperature
Pure water is about 7 at 25 °C; this value decreases with increasing temperatures. At 50 °C, it is 6.55. It is also worth to note, that water that has been exposed to air is mildly acidic, because it absorbs carbon dioxide from the air.
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Answers by country

1.0
7.0
10.0
It depends on the temperature
answers
flagPakistan
6%
50%
0%
43%
16
flagUkraine
26%
29%
4%
37%
67
flagRussia
23%
38%
0%
38%
13
flagGreece
9%
54%
0%
36%
11
flagthe United States
11%
49%
7%
30%
148
flagIndia
2%
62%
5%
29%
135
flagGermany
18%
45%
9%
27%
22
flagAustralia
8%
69%
0%
21%
23
flagPoland
19%
53%
5%
21%
4239
flagthe United Kingdom
20%
58%
2%
17%
34