Dec 31, 2015
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I thought the pH was 12. How am I supposed to know if it is an extremely dilute solution?
 

Charles_Darwin

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Mar 28, 2016
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I thought the pH was 12. How am I supposed to know if it is an extremely dilute solution?
10^-12 means that the concentration of H+ ions is pretty dilute :
0.000000000001 moles of H+ per liter, to be exact. As for what range something is considered dilute /not dilute, I think if the test makers were to ask something like that they'd make it something obvious like 10^-12
 
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Don Kim

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May 11, 2014
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water already has pH of 7, so adding an acid solution of pH 12 will not affect it that much since water is a lot more acidic already, by 100,000 fold.