random ppm question - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 10-12-2011, 10:40 PM Thread Starter
SCAPEr
 
sayurasem's Avatar
 
PTrader: (2/100%)
Join Date: Jun 2011
Location: Loma Linda, CA
Posts: 2,560
random ppm question

so if 1ppm = 1 milligram of something per liter of water (mg/l)

what about 1,000,000ppm = 100% liquid of a substance?

i.e. PURE liquid CO2 (in a closed container) = 1,000,000ppm right?

just trying to gain more knowledge


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
|

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
|
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
|
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

sayurasem is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 10-12-2011, 11:35 PM
Nerd Alert.
 
Da Plant Man's Avatar
 
PTrader: (74/100%)
Join Date: Apr 2010
Location: The Bush, Alaska
Posts: 5,719
Yep, it would be like saying 1/1 = 1 Thus 1,000,000/1,000,000 = 1

The percent sign '%' is parts per hundred. ‰ is Parts per thousand and so on. Just simple math


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

RAOK CLUB #12
Wabi-kusa Pimp #1
"99% of the time, a fish tank with plants will fail. Once you start a dedicated planted tank with fish, then you begin to succeed." - Geniusdudekiran
Da Plant Man is offline  
post #3 of 5 (permalink) Old 10-13-2011, 01:18 AM Thread Starter
SCAPEr
 
sayurasem's Avatar
 
PTrader: (2/100%)
Join Date: Jun 2011
Location: Loma Linda, CA
Posts: 2,560
Quote:
Originally Posted by Da Plant Man View Post
Yep, it would be like saying 1/1 = 1 Thus 1,000,000/1,000,000 = 1

The percent sign '%' is parts per hundred. ‰ is Parts per thousand and so on. Just simple math
simple for you! lol I'm not smart :/

ok cool thx!


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
|

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
|
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
|
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

sayurasem is offline  
 
post #4 of 5 (permalink) Old 10-13-2011, 04:07 AM
Planted Tank Guru
 
PTrader: (84/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,012
The only pure liquid CO2 is what is in a CO2 bottle under about 800 psi pressure. What some people call liquid CO2 is really Excel, and isn't CO2 at all. Excel is very dilute, so it is mostly water.

Hoppy
Hoppy is offline  
post #5 of 5 (permalink) Old 10-13-2011, 05:03 AM
Wannabe Guru
 
PTrader: (1/100%)
Join Date: Apr 2011
Location: Westfield, IN
Posts: 1,746
Quote:
Originally Posted by sayurasem View Post
so if 1ppm = 1 milligram of something per liter of water (mg/l)
This only works for relatively weak solutions if you want any sort of precision. Once you get a concentrated solution, the density of the solution typically changes. It's a pretty good approximation for anything we do though, even up to the ~20,000 ppm used in saltwater tanks. This equivalence only works for aqueous solutions or other solutions with densities very close to that of water (1,000,000 mg/l, specifically.)

More clearly:
Parts per million is found by taking the mass of a particular component of a mixture and divided that value by the total (original) mass of the sample from which it had been removed, then multiplied that value by 1,000,000. It doesn't have to have anything to do with an aqueous solution at all.

Milligrams per liter is determined by finding the mass of a particular solute in one liter of solution, not per liter of water.
jasonpatterson is offline  
Reply

Tags
None

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome