### Log version vs ln Version

Posted:

**Sun Mar 10, 2019 8:59 pm**How do we know which one to use? Does it matter?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=142&t=44027

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Posted: **Sun Mar 10, 2019 8:59 pm**

How do we know which one to use? Does it matter?

Posted: **Sun Mar 10, 2019 9:39 pm**

It actually doesn't matter whether you use the log version or the ln version; the log version is an altered version of the ln version, so both should give the same result.

Posted: **Sun Mar 10, 2019 9:50 pm**

I would recommend using the ln version more because that version is given in the formula sheet

Posted: **Sun Mar 10, 2019 10:03 pm**

The ln version might be more convenient, but both log and ln give the same ratio/result.

Posted: **Sun Mar 10, 2019 11:47 pm**

It does not matter. But using log is more convenient when calculating for pH.

Posted: **Mon Mar 11, 2019 11:40 pm**

It really shouldn't matter the difference is simply their base number (log with base 10 and ln with base e)

Posted: **Tue Mar 12, 2019 6:50 pm**

It does not matter which one you use, however I would use the ln one, since that is the one that is included on the equation sheet that we are given on tests and the final

Posted: **Wed Mar 13, 2019 2:40 pm**

Both versions give you the right answer. However, on the equation sheet, the log version is a constant over n, so you have to keep in mind that the constant given can only be used if the reaction is taking place at 25 Celsius.