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The pH value of pure water is 7.0 , but ground water is often acidified by gases dissolved in rain, or made alkaline by mineral deposits on the ground.
This value is determined by the equation: pH=-log10([H+])
where [H+] is the concentration of hydrogen ions in the solution and log10() is the common log of the value. Auto-ionization of H2O into H+ and OH- tends to equalibrium at [H+]=1x10-7 mol/L
Wiki User
∙ 15y ago
Wiki User
∙ 9y agoThe PH of something measures the amount of acidity in it. The PH of pure water at zero Celsius is just about 7 meaning that it is a neutral product.
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∙ 10y agowhat is the ph of water at 20 degree farhrenheit
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∙ 13y ago7
it goes 1-2-3-4-5-6-7-8-9-10-11-12-13-14 so its directly neutral in the middle
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∙ 15y agopH = 7
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∙ 14y agoabout 12
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∙ 15y ago7
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∙ 12y ago7
Wiki User
∙ 11y agoph=7
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What is acid groundwater?
Pure water is said to be neutral, with a pH close to 7.0 at 25 °C (77 °F). Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline. Acid ground water is water in the rocks that has a pH of 2 to 6.
What is pH of pure water at 70 degrees celsius?
The pH of pure water at 50 °C is 6.55The dissociation constant, KW, has a value of 1.0*10−14 at 25 °C, so in neutral solution both the hydrogen ion concentration and hydroxide ion concentration are 1.0*10−7 mol/L.The pH value of pure water decreases with increasing temperatures because the dissociation constant, KW, is depending on the temperature: 7.94*10-14. So the pH of pure water at 50 °C is 6.55. At that temperature both H+ and OH- concentrations are 2.8*10-7 mol/L[More principle information on "Temperature dependence" is found in 'Related links'.]
Which solution is the most acidic A. apple juice pH equals 3 B. pure water pH equals 7 C. hand soap solution pH equals 10 D. drain cleaner solution pH equals 14?
its 7!
What is the pH of diesel?
5.6 at 25 degrres C
Is soil with a pH of 6 alkaline?
It depends on temperature.If temperature is 25'c,it an acidic pH.
What is a pH of a Neutral solution like pure water?
A neutral solution has a pH value of exactly 7 (at 25oC).See the Related Questions to the for more information about acids, bases and the pH scale.Neutral is neither acid (< 7) nor base (> 7), hence the name neutralThe pH value of 7.0 is considered to be neutral. Pure water has a pH of 7.0Typically a pH of 7 is considered "neutral" since it is the pH of water.7Actually that's at 25 Degree CAt 37 degrees C (body temp) its 7.4
What is the pH factor?
In chemistry, pH is a measure of the activity of the hydrogen ion. Pure water has a pH very close to 7 at 25°C. Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline.
What is acid groundwater?
Pure water is said to be neutral, with a pH close to 7.0 at 25 °C (77 °F). Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline. Acid ground water is water in the rocks that has a pH of 2 to 6.
What is the Ph of hydrated lime?
Hydrated Lime: Solubility in Water: Slightly soluble in water. pH=12.4@25°C
What is pH of pure water at 70 degrees celsius?
The pH of pure water at 50 °C is 6.55The dissociation constant, KW, has a value of 1.0*10−14 at 25 °C, so in neutral solution both the hydrogen ion concentration and hydroxide ion concentration are 1.0*10−7 mol/L.The pH value of pure water decreases with increasing temperatures because the dissociation constant, KW, is depending on the temperature: 7.94*10-14. So the pH of pure water at 50 °C is 6.55. At that temperature both H+ and OH- concentrations are 2.8*10-7 mol/L[More principle information on "Temperature dependence" is found in 'Related links'.]
Pure water has a pH of 7?
Yes and no. Pure water at 25°C has a pH of 7.0. However, water autoionises, that is splits into H+ (in the form of H3O+) and OH- spontaneously. This process is accelerate by increased temperature, that is, occurs more readily at higher temperature. Therefore at a higher temperature there will me more H+ and OH- in solution (always in equal proportions). As pH is a measure of the amount of H+ in solution, as the temperature increases, the pH will lower (lower pH means more H+). i.e. at 37°C the pH of pure water, the same water as above, will be 6.81. This water will not be acidic though, as the OH- concentration has increased by the same amount, it's just that pH only measures the pH concentration. Conversely, cool the water, and the pH will go up, 7+ for same reasons.
What is the pH neutral solution?
When a pH level is 7.0, it is defined as 'neutral' at 25°C because at this pH the concentration of H3O+ equals the concentration of OH− in pure water. - Wikipedia
Why is the pH of pure water 7?
It almost never is. BUT (pH stands for potential hydrogen) pH is a (negative of) the log of the number of positive ions in the water. At 25 degrees C, thermal agitation in pure water will produce 10 to the minus 7 (moles of) ions per liter, thus pH 7 (at 37 degrees it's 7.4)
What is the density of PURE water in its liquid state?
At 25 degrees C the density of water is 1.0 g/mL. If the temperature of the water goes above 25 degrees C the density will drop. If the temperature of the water goes below 25 degrees C the density will rise.
What is a solution considered to be if it has pH lowed than 7?
It is an acid. If it is higher, it is a base (otherwise known as an 'Akali' in some countries).
What is the pH of pure water?
The pH of "pure" water at room temperature is 7.0(Temperature will have an effect on pH of pure water. As the temperature increases so does the dissociation of hydrogen ions from H20)The pH scale runs from roughly 0 to 14(acids) 0 1 2 3 4 5 6 (neutral) 7 (bases) 8 9 10 11 12 13 14pH is defined as the 'negative value of 10log(molar concentration of [H+]aq ),so in pure water [H+]aq = 1,0 x 10-7 = 0,000.000.1 mol/liter,pH = -10log(molar concentration of [H+]aq ) = 10log(1,0 x 10-7 ) = 7.0Absolutely 100% pure water will have a pH of exactly 7. However, if exposed to normal air it will dissolve carbon dioxide and form carbonic acid (which lowers the pH to around 6, give or take half a pH).This is a lot more complicated than it would appear.The nominal answer is 7. If you have extremely pure water, however, in contact with air, it will absorb enough CO2 to have a pH of about 6.5, and a resistivity of about 1However, pH is a measure of the hydronium ion in water, and in extremely pure water, there is no ionization, which is why it will have resistivity about 15 million times that of regular distilled or deionized water.______________________________________________________________At 25° C the pH of pure water is very close to 7.Acids have a pH less than 7 while bases have a pH greater than 7.Because it has a pH of 7, water is considered to be neutral. It is neither an acid nor a base, but is the reference point for acids and bases
What does a basic pH mean?
@25'C ,pH higher than 7
