I Need a chemist! Ever use molarity instead of ppm...

There is a terrible mistake in this spreadsheet, and i can't remove the question! lol. at the very least Ca is adding up wrong.

thought i made a mistake in spreadshett.. if anyone read that comment, that's why it was removed.. thanks for the link shag, but not quite what i am asking. i know the difference of a mole and ppm. Amadeo Avogadro was a cool dude! it is absolutely absurd how PK is labeled on fertilizer in america, but already accounted for that.

don't accidentally fat finger select as answer on your phone if you try to like this post!! It happens!!

And also this is not rocket science IMO. Just give them nutes with right balance and maintain good ec and they will be happy. It does not matter if you have your calculations off by 5% in PPM's if the girls are still liking it

Some nute companies tells their P and K as a P2O5 and K2O and those have to be convverted to get the accurate P and K ppm's and there is something else but I believe that when counting PPM's the right way it is legit. And also if the bottle says for example 2:3:6 it is just the ratio and you need to check the actual % of different nutes in the bottles and count from there!

Hi! Basically it is just different unit of weight and when you weight in moles you measure the weight (1 mole) of exact amount of particles, atoms etc. and one mole is always different per/g for different atoms and salts etc cos every atom is different weight The long version from wikipedia (My english ain't too good for this good explanation) The mole (symbol: mol) is the unit of measurement for amount of substance in the International System of Units (SI). A mole of a substance[1] or a mole of particles[2] is defined as exactly 6.02214076×1023 particles, which may be atoms, molecules, ions, or electrons.[1] In short, for particles 1 mol = 6.02214076×1023.[3][2] The number 6.02214076×1023 (the Avogadro number) was chosen so that the mass of one mole of a chemical compound, in grams, is numerically equal (for most practical purposes) to the average mass of one molecule of the compound, in daltons. Thus, for example, one mole of water contains 6.02214076×1023 molecules, whose total mass is about 18.015 grams – and the mean mass of one molecule of water is about 18.015 daltons. I'm calculating my nutes with PPM's of every nute and I think it works pretty good 'cos there is studies that what concentration of what nute is good and when using salts it is easy to control

There's a rollitup forum post with severa formulas listed... i tried to find it.. i have a few in this spreadsheet (screenshot above) in a table for comparison... but, if they were going to a "1:1:1" ration with certain elements and used ppm, that's going to give you the wrong answer and not based in any functional knowledge of chemistry from what i can tell. molecules have different weights.. you are using apples and oranges when using ppm of different molecules.

Okay, needs more... So, picture shows me fiddling with molar ratios.. equal ppm isn't equal in a functional way, but maybe what results in the proper molar ratio and just said in laymans terms poorly. Looking for a ballpark with conceptual knowledge.. like.. "You should ahve equal parts Ca and Mg due to the biological processes going on in the plant" "you'll want 2x N to thos parts".. etc etc.. ppm is just wrong.. i don't get its use when it comes to how molecules are actually used and interact with each other.