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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: can ph be greater than 14 and less than zero??
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izzac (9)

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can ph be greater than 14 and less than zero??
    
pinnacle (223)

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Yes it can be
vary wid temperature

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chimanshu_007 (11100)

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yeah sure pH cn be -ive :)

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dev_22oct (1326)

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Theoretically, value of pH could range from - infinity to + infinity but practically the limits in aqueous solutions are from -1.2 to +15
 
pH is basically not equals to -log[H+] bt it actually depends upon the thermodynamics activities rather than [H+] ie on log aH+ where aH+ =[H+]F+ . in dilute solution F+ is near enough to unity and thus aH+ =[H+]. thus ph of 10m solution can't be calculated n its near to zero
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ravi00 (24)

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na it cant b -ve. or >14
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djdylan2000 (126)

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then why r we taught that it lies between 1 and 14?

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dev_22oct (1326)

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this is becoz we can only calculate ph frm 1 to 14 practically by using conventional ph meter.
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