Reef Chemistry Question of the Day #80 pH

[Randy Holmes-Farley]

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

 

[beaslbob]

a
next question please

 

[Randy Holmes-Farley]

Patience.

 

[Cory]

Haha

I'll say A too. Unless protons get less as you rise ph.

 

[Birddog]

a
next question please

+1 well said!

 

[beaslbob]

+1 well said!

I'm usually all wrong on these.

 

[Birddog]

I'm usually all wrong on these.

Nah... not this time, unless Mr. Holmes-Farley has a trick up his sleeve :nerd:

 

[beaslbob]

Nah... not this time, unless Mr. Holmes-Farley has a trick up his sleeve :nerd:

my fear also.

 

[Randy Holmes-Farley]

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!

 

[beaslbob]

dern
I got one right and even for the correct reason

 

[hart24601]

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.

 

[Randy Holmes-Farley]

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

OK :lol: