Join Date: Jun 2015
Location: Victoria, BC, Canada
Your math is good.
The calculator link does not work.
Oh, my. I have not done these types of calculations in almost 3 decades, but to show your math is good:
KNO3 molecular weight (MW) is 101.1
K's MW is 39
Therefore NO3 MW is 61
The 10.2 gms of KNO3 translates to 6.15 gms of NO3 (10.2 multiplied by 61, then result divided by 101.1).
Hard to type math equations but here goes.
6.15 gm NO3/500 ml = 12.3 gm/L = 12.3 ppt NO3 in the stock solution
Which is also 12300 ppm NO3 in stock soln
Which is also 12300 mg/L NO3
[12300 mg/L x 0.010L (the 10 ml you added)] divided by [25 L (your tank volume)] ==> 4.9 mg/L
So, basically that's 5 ppm.
You can rule out the math, that's just about all I can help you with.
Did the KNO3 fully dissolve? I would expect it to.
Daisy Mae V
According to my husband, I have a habit of jumping right in!