quick question,
do we have to know how to estimate Logs on the dat to calculate ph and poh values???
thanks
do we have to know how to estimate Logs on the dat to calculate ph and poh values???
thanks
estimate Logs??
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I personally didn't come across one but here is what you do:
Say you need to estimate -log(5x10^-3)
By the log rule, that = -(log(5) + log(10^-3))
= -log(5) - (-3)log(10)
= -log(5) + 3log(10)
= 3 - log(5)
And since 0 < log(5) < 1 (as 5 is between 1 and 10), then your answer lies somewhere between 2 and 3. With that estimate you should be able to get your answer.
Say you need to estimate -log(5x10^-3)
By the log rule, that = -(log(5) + log(10^-3))
= -log(5) - (-3)log(10)
= -log(5) + 3log(10)
= 3 - log(5)
And since 0 < log(5) < 1 (as 5 is between 1 and 10), then your answer lies somewhere between 2 and 3. With that estimate you should be able to get your answer.
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YES! I would know how to do it. Without telling you anything about the actual test, I will say it would be in your best interest to know that. 😀
