Reef Chemistry Question of the Day #80 pH

Randy Holmes-Farley

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Reef Chemistry Question of the Day #80

Compared to seawater at pH 8.5, how many more free protons (H+) are there in seawater at pH 7.5?


A. Ten times as many
B. Twice as many
C. Equal numbers
D. Half as many
E. One-tenth as many
 

Cory

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Haha

I'll say A too. Unless protons get less as you rise ph.
 
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Randy Holmes-Farley

Randy Holmes-Farley

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Well, can't fool you guys today.

As you all got right, the answer is... A. Ten times as many

pH is a logarithmic scale. That means that for every change of 1 pH unit lower, H+ increases by a factor of 10.

So pH 7 has ten times as much H+ as pH 8, and pH 6 has 100 times as much as pH 8. :)

This has more:

http://www.advancedaquarist.com/2004/2/chemistry



Happy Reefing!
 

hart24601

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Well, can't fool you guys today.

As you all got right, the answer is... A. Ten times as many

pH is a logarithmic scale. That means that for every change of 1 pH unit lower, H+ increases by a factor of 10.

So pH 7 has ten times as much H+ as pH 8, and pH 6 has 100 times as much as pH 8. :)

This has more:

Aquarium Chemistry: Measuring pH with a Meter ? Advanced Aquarist | Aquarist Magazine and Blog



Happy Reefing!

Bonus points??? Richter scale, decibel, stellar brightness and some absorbance scales are also logarithmic.
 

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