The latter recipe should let you make 5 batches of STS from each 25ml bottle of A and B, respectively.
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Amazing. I would credit ai for the answer, but you’re the true hero here! Thanks @HolyAngel …saved my ass again…lol
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Aw thanks!
So according to the AI, the Silver Nitrate is still the limiting reactant in the STS solution. So one could double the Silver Nitrate from 0.8g to 1.6g, while keeping the same 3.16g of sodium thiosulfate, and the resulting silver thiosulfate will be double the concentration and will still not precipitate out.
Actually, also according to the AI, it takes two moles of Silver Nitrate to react with one mole of Sodium Thiosulfate to produce one mole of Silver Thiosulfate.
So it seems like we could cut down the amount of Sodium Thiosulfate from 3.16g to just barely over double whatever the Silver Nitrate is
Like if using 0.8grams of Silver Nitrate, you should only need ~1.7g of Sodium Thiosulfate to make the STS and it’d be the same concentration
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Yet more info straight from the AI, someone please confirm the math if you can… Trying to figure out the percentage strength of STS so we can compare it with other STS recipes.
The original recipe of 0.8g/3.16g should come out to:
Molar Mass of Ag₂S₂O₃:
-
Silver (Ag) has an atomic weight of about 107.87 g/mol.
-
Sulfur (S) has an atomic weight of about 32.07 g/mol.
-
Oxygen (O) has an atomic weight of about 16.00 g/mol.
-
Molecular weight of Ag₂S₂O₃ = 2(107.87) + 2(32.07) + 3(16.00) = 215.74 + 64.14 + 48.00 = 327.88 g/mol.
Moles of AgNO₃ in 0.8g:
- The molar mass of AgNO₃ is approximately 169.87 g/mol.
- Moles of AgNO₃ = 0.8g / 169.87 g/mol ≈ 0.00471 mol.
Moles of Ag₂S₂O₃ formed:
- The reaction between AgNO₃ and Na₂S₂O₃ to form Ag₂S₂O₃ is a 2:1 reaction. Therefore, the moles of Ag₂S₂O₃ formed will be half the moles of AgNO₃ used.
- Moles of Ag₂S₂O₃ = 0.00471 mol / 2 ≈ 0.002355 mol.
So the Mass of Ag₂S₂O₃ = moles × molar mass = 0.002355 mol × 327.88 g/mol ≈ 0.772 g
The total volume of the solution is 150 ml (25 ml from each bottle plus 100 ml distilled water).
- Concentration (g/ml) = mass of Ag₂S₂O₃ / total volume = 0.772 g / 150 ml ≈ 0.00515 g/ml
To convert this to a percentage, we need to consider the grams per 100 ml:
- 0.00515 g/ml × 100 ≈ 0.515% STS
Per the original recipe with 0.8g silver nitrate and 3.16g sodium thiosulfate
Edit: Fixed the calculation, should be accurate now
If doubling the Silver Nitrate to 1.6g; note: Idk if that’s safe or not 
the percentage would be 1.029%
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Hold on a second here…
Hmmm…I’m inclined to concur…
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Took some editing but I think I got it right now. Also think I’m done talking to the AI for a bit 
Again regardless, we should be able to cut down the Sodium Thiosulfate usage to just over half the Silver Nitrate amount
Wait a minute. Are you doing 0.8g silver nitrate into the 25ml of distilled water? And same with the 3.16g sodium thiosulfate?
If so, your mix is around 4x stronger than Sebring’s mix which called for dissolving each of those same weights into 500ml water 
that higher concentration would explain your reversal success tho 
Sebring’s stock STS mix comes out to around 0.154% STS
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I’m not sure what the raw ingredients are…it’s the shitseeds sts kit.
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Oooh I see… so the bottles come with 5ml of mix already that is A and B and you dilute them further with 25ml of water before cutting in half to make two batches… in that case, we have no idea at all what the concentration is… let me redo the calculations
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Ok, to split the sts kit into 5 batches instead of 2, make the bottles of A and B just like he says. Add 25ml water to each bottle to make 30ml each of A and B respectively. Then, it’s pretty much like you already said 
6ml A
6ml B
60ml water
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@HolyAngel your doing my income tax return for sure now. Damm. Wayy to much mathematical quadraticals here. ( and no, I don’t even understand my own reference )
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Lol I’m mostly relying on chatgpt over here. it’s wrong a lot, especially with math but I think that’s all accurate
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I believe the bottles are 30ml…but the instructions say to only add 25ml.
The raw ingredients were already in the bottle…I could see, what looked like, a small glass shard in one of them. The other bottle was too dark to see if it was a powder or crystal form.
So works out to…
25ml A
25ml B
150ml Empty Bottle C
When mixing final solution to be sprayed it’s…
12.5ml A
12.5ml B
125ml distilled water bottle C
But I’m trying to get 5 batches instead of 2…so just divide all starting numbers by 5?
25ml A ÷ 5 = 5ml
25ml B ÷ 5 = 5ml
125ml distilled water bottle C ÷ 5 = 25ml
Lol…jeez…I’m asking it all again…lol
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Lol if it’s 25ml total in each bottle then it’s
5ml A
5ml B
50ML water
Lol…I think I was over thinking it…and not explaining it properly.
Trying to make 5 batches with this…
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Yeah I thought the
(30ml) and fill with 25ml RO or Distilled water
Meant there was 30ml of liquid total in each bottle and not 25ml due to dry ingredients (duh lol). It is indeed the 5ml/5ml/50ml to make 5 batches of that stuff and keep the same 12.5ml/12.5ml/125ml ratio.
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Out of likes…sts application commences tomorrow morning. Thanks again for the help…has been a good day…lol
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Separately, here is the info for Sebring’s Recipe
Sebring’s STS Recipe
Bottle A: 0.8g Silver Nitrate + 500ml RO/Distilled Water
Bottle B: 3.16g Sodium Thiosulfate + 500ml RO/Distilled Water
Add A to B in equal parts to make Stock STS
Dilute portion of Stock STS with water in a 1:9 ratio to make STS Spray
Recommended Rate:
50ml A + 50ml B = 100ml Stock STS
100ml Stock STS Solution + 900ml Water = 1 liter of 0.01544% STS Spray
Click here for the math
- Molar Mass and Moles of AgNO₃:
- Molar mass of AgNO₃ = 107.87 (Ag) + 14.01 (N) + 3 × 16.00 (O) = 169.87 g/mol.
- Moles of AgNO₃ = mass / molar mass = 0.8g / 169.87 g/mol = 0.00471 moles.
- Molar Mass and Moles of Na₂S₂O₃:
- Molar mass of Na₂S₂O₃ = 2 × 22.99 (Na) + 2 × 32.07 (S) + 3 × 16.00 (O) = 158.11 g/mol.
- Moles of Na₂S₂O₃ = mass / molar mass = 3.16g / 158.11 g/mol = 0.01998 moles.
- Reaction Ratio and Limiting Reagent:
- The reaction between AgNO₃ and Na₂S₂O₃ is in a 1:2 molar ratio.
- AgNO₃ is the limiting reagent, so the amount of STS formed will be based on the moles of AgNO₃.
- Calculation of STS Formed:
- Molar mass of STS (Ag₂S₂O₃) = 2 × 107.87 (Ag) + 2 × 32.07 (S) + 3 × 16.00 (O) = 327.88 g/mol.
- Mass of STS formed = moles of AgNO₃ × molar mass of STS = 0.00471 moles × 327.88 g/mol = 1.544 g.
- Concentration of STS in Final Solution:
- Total volume of the solution = 1000ml (1 liter).
- Total mass of STS in the solution = 1.544 g.
- Percentage of STS in the solution = (mass of STS / total volume of solution) = (1.544 g / 1000 ml) = 0.01544%.
Spray the plant(s) with this mix at lights out every 2 days until balls show, starting a week before flipping to flower.
Apparently commonly used spray’s, according the AI, have concentrations from 0.03-0.05% STS, with the max around 0.1% STS. Obviously higher concentrations can burn the plant but might be more successful too. Sebring’s is definitely on the low end of the scale. Here’s some other ratios keeping the stock solution the same.
1:9 ratio - Sebring’s recommended
100ml Stock STS + 900ml Water = 0.0154% STS Spray
1:7 ratio
100ml Stock STS + 700ml Water = 0.0193% STS Spray
1:3 ratio
100ml Stock STS + 300ml Water = 0.0386% STS Spray
1:2 ratio - Could definitely start seeing burn here
100ml Stock STS + 200ml Water = 0.05147% STS Spray
1:1 ratio
100ml Stock STS + 100ml Water = 0.0772% STS Spray
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Excuse the shitty burple. I’m just doing a small plant in my house away from the grow. Sebrings recipe. I tried this once before on a different plant and although I got nanners and a few flowers the pollen was junk and it didn’t result in any seed. I have a feeling it needed more less sprays.
This time I marked branches with zip tie loops. Green, yellow, red. 3 sprays, 4 sprays and 5 sprays. It might be helpful trick if someone is trying to figure out what works for a specific plant.
Anyway it seems to be working much better this round. I’ll really clip the branches off and examine what’s what when I’m done.
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Are they all throwing balls? Do you see any difference in how many times you spray?
Do you mean you sprayed on branch 3 times and that’s it…another branch 4 times and that’s it, etc? Are you done spraying entirely or will you continue?
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