If it's 59% Phosphoric acid (like most pH down products) w/v%:
To get elemental P, multiply by 0,3161 then multiply with it's percentage.
(Phosphoric acid is H3PO4, so there are other elements in it, not just P. Use a molar mass calculator to get the percent of P in H3PO4, it is 31,61%.)
H3PO4 * 0,3161 * 0,59 = 0,1865 P
To get P2O5 from elemental P (use the molar mass calc):
0,1865 * (1/0,436) =0,4278
If its w/w you have to multiply these with density (in this case 1,42)
0,1865 P * 1,42 = 0,26483 P
0,4278 P2O5 * 1,42 = 0,607476 P2O5
If Canna PK 13/14 is what you want to make:
http://www.cdfa.ca.gov/egov/is/fert/fert2.asp?ID=11387
P2O5=10% (= 4,36 P)
K2O=11% (= 9,130 K)
(assuming its w/v)
It is not possible to achieve these results with monopotassium phosphate (KH2PO4) and phosphoric acid (H3PO4) alone.
Use the molar mass calculator to get P and K % of KH2PO4:
28,73% K
22,76% P
These ratios will always stay the same, it's not possible to raise K without raising the P.
The best you can get is:
4,36 P
5,47 K instead of 9,13 K
For these type of calculations the best thing to use is a fertilizer calculator like http://allhydroponics.blogspot.com/2010/06/first-free-hydroponic-nutrient.html.
You put in the desired nutrient levels, along with the fertilizers, acids, or salts you have, and it gives how much do you need from them to achive the nearest ppms.
To get elemental P, multiply by 0,3161 then multiply with it's percentage.
(Phosphoric acid is H3PO4, so there are other elements in it, not just P. Use a molar mass calculator to get the percent of P in H3PO4, it is 31,61%.)
H3PO4 * 0,3161 * 0,59 = 0,1865 P
To get P2O5 from elemental P (use the molar mass calc):
0,1865 * (1/0,436) =0,4278
If its w/w you have to multiply these with density (in this case 1,42)
0,1865 P * 1,42 = 0,26483 P
0,4278 P2O5 * 1,42 = 0,607476 P2O5
If Canna PK 13/14 is what you want to make:
http://www.cdfa.ca.gov/egov/is/fert/fert2.asp?ID=11387
P2O5=10% (= 4,36 P)
K2O=11% (= 9,130 K)
(assuming its w/v)
It is not possible to achieve these results with monopotassium phosphate (KH2PO4) and phosphoric acid (H3PO4) alone.
Use the molar mass calculator to get P and K % of KH2PO4:
28,73% K
22,76% P
These ratios will always stay the same, it's not possible to raise K without raising the P.
The best you can get is:
4,36 P
5,47 K instead of 9,13 K
For these type of calculations the best thing to use is a fertilizer calculator like http://allhydroponics.blogspot.com/2010/06/first-free-hydroponic-nutrient.html.
You put in the desired nutrient levels, along with the fertilizers, acids, or salts you have, and it gives how much do you need from them to achive the nearest ppms.