# Thread: pH scale - with a special log

1. ## pH scale - with a special log

The scale for acidity is defined by where is the concentration of hydrogen ions measured in moles per liter (M).

A solution has a of 7.8.

Calculate the concentration of hydrogen ions in moles per liter (M).

The concentration of hydrogen ions is moles per liter

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okay so here's what i did

7.8 = -log10 (X)

10^7.8 = -X

seems like that's wrong though? any thoughts?

2. Originally Posted by badshahkhan
The scale for acidity is defined by where is the concentration of hydrogen ions measured in moles per liter (M).

A solution has a of 7.8.

Calculate the concentration of hydrogen ions in moles per liter (M).

The concentration of hydrogen ions is moles per liter

-------------

okay so here's what i did

7.8 = -log10 (X)

10^7.8 = -X

seems like that's wrong though? any thoughts?

Hey here's what you need to do:

-log10 (H+) = 7.8

-7.8 = log 10 (H+)

10^-7.8 = (H+)