Abstract
pH is the negative logarithm of the hydrogen ion concentration (more exactly the activity), or algebraically pH = −log10 [H+] or pH= log101/[H+]. This notation was invented by Sorensen to make very small numbers fit into a more comprehensible range; thus a hydrogen ion concentration of 0.0000007 molar or 10−7M is pH 7.0. In doing so however he introduced an important peculiarity: the pH scale is exponential. Therefore, a solution at pH 6.0 contains ten-times less H+ than at pH 7.0 and a wort at pH 5.2 contains nearly four times as much H+ as a wort at pH 5.8.
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© 2006 Springer
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Lewis, M.J., Bamforth, C.W. (2006). pH. In: Essays in Brewing Science. Springer, Boston, MA. https://doi.org/10.1007/0-387-33011-9_2
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DOI: https://doi.org/10.1007/0-387-33011-9_2
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-387-33010-5
Online ISBN: 978-0-387-33011-2
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