2006-09-23 19:16:27 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
To put it in simple terms, neutral is considered neutral because that's the pH of water. Acid is the concentration of H+ ions in a solution. When you take the negative base 10 logarithm of the concentration of H+ ions in a solution of pure H2O, you get 7. An acid is a chemical that gives off H+ ions. When you take the negative logarithm of the concentration of H+ ions of an acid, you get a number less than 7. A base is the opposite, something that absorbs H+ ions. Thus, the negative logarithm of a base comes out to 7.
When something has a lot of acid in it, it's called "acidic". When something has a lot of base in it, it's called "basic", or "alkaline".
The generally accepted maximum and minimum for acids and bases is 0 to 14, although extreme examples (concentrated strong acids and bases) can go to far beyond the edges of that scale (negative numbers and such).
2006-09-23 19:42:16 · answer #1 · answered by Anonymous · 0⤊ 0⤋
pH measures the activity or dissociation of H+ (hydrogen) in an aqueous solution.
The number 1 - 14 indicates the relative amount of dissociation between H+ and OH- (hydroxide). 7 is isn't "normal". It's neutral because at 7, H+ and OH- are in relatively equal amounts. H(OH) is water... H2O.
A pH less than 7 indicates a higher H+ activity or a low OH- activity, whereas a pH over 7 indicates a low H+ activity or a higher OH- activity; that's why HCl is acidic and NaOH is basic.
Basicity is the same as acidity reversed. Basicity is measured in pOH instead of pH, but the same rules apply. A basic or alkaline substance has a pH of greater than 7. Bases have higher OH- activity and low H+ activity.
2006-09-23 19:32:12 · answer #2 · answered by the_quetzal 3 · 0⤊ 0⤋
The pH of water is 7 because there is a formula that you when fill in the information of the pH and the pOH the answer comes out to be 1 and then you put 1 into the formula for getting pH and then answer comes out to be 7... i'm sorry that i cant give you specifics but i'm currently missing my chemistry notebook.
2006-09-23 19:30:29 · answer #3 · answered by xdesdemona13x 1 · 0⤊ 0⤋
nuetral pH is 7. there is no "normal". 1 is very acidic and 14 is very alkiline and 7 is in the middle. water is 7.
2006-09-23 19:19:36 · answer #4 · answered by nobudE 7 · 0⤊ 0⤋
well, pH 7 is neutral, not normal. pH 7 happens when there is a net balance of acidic and basic ions. ions like protons (H+) makes a solution acidic, the more you have it, the more acidic it will be. ions like hydroxy (OH-) makes solution basic (alkaline), the more you have it the more basic it will be. pH levels are not the same in differnt environments. for instance the pH in our stomach is pH 2, which is very acidic, as the stomach uses it to digest food. a pH is normal in environments when it facilitates optimal activity.
2006-09-23 19:41:44 · answer #5 · answered by kamalia 1 · 0⤊ 0⤋
base and alkaline (basicity and alkalinity)... they are synonyms
if the solution has pH higher than 7 then its basic
if it's lower than 7 then it's acidic...
best answer?
2006-09-23 19:56:32 · answer #6 · answered by teroy 4 · 0⤊ 0⤋
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2016-12-15 13:20:05 · answer #7 · answered by edme 3 · 0⤊ 0⤋