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Old 04-24-2009, 11:30 PM   #11
menschmaschine
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Naturally soft water often has a relatively low pH, while hard water has a medium to high pH.
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Old 04-27-2009, 03:33 PM   #12
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As I understand it...

Hardness refers to the level of dissolved solids. The higher the level, the harder the water.

The pH level tells whether the solution is an acid (lower pH) or base (higher pH) Alkalinity refers to a pH above 7, and is often used instead of the word base.
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Old 04-27-2009, 04:12 PM   #13
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Quote:
Originally Posted by arturo7 View Post
The pH level tells whether the solution is an acid (lower pH) or base (higher pH)...
This much is true.

Quote:
Alkalinity refers to a pH above 7, and is often used instead of the word base.
This is where some of the confusion stems. Alkalinity is not the same as pH. Alkalinity is the 'acid neutralizing ability' of a solution and not the pH itself. But you are correct that people use the term 'alkaline' to refer to a solution of high pH (i.e. as an opposite to the word 'acidic').
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Old 04-27-2009, 04:47 PM   #14
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Quote:
Originally Posted by SpanishCastleAle View Post
Alkalinity is not the same as pH. Alkalinity is the 'acid neutralizing ability' of a solution and not the pH itself.
I think we are saying the same thing.

'Alkalinity' is to 'pH' as 'fast' is to 'speed'
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Old 04-30-2009, 07:30 PM   #15
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Quote:
Originally Posted by boredatwork View Post
Hard and soft water refer to water hardness. The connection you are referring to is pH and Alkalinity, not Hardness. Alkalinity is a pH buffer not Hardness. Hardness and pH are two independent things.
Right, but hard water often has alkalinity, no? I admit I have not been brewing for long, but I have a koi pond and often deal with water quality issues. From what I understand, more often than not hard tap water is due to calcium carbonates etc, which do impart alkalinity. I guess my question is, what accounts for hard tap water that doesn't have alkalinity?

 
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