So there is a product I use that is good for mites and pm etc
The ingredients say

Citric acid 30%
Lactic acid 50%
Water 20%

So the idea is you dilute it 1.5-2.5ml per 10 litres

Working this out the 30% citric ends up at 0.75% being applied which falls In With other citric foilar spray dosages too if I am not mistaken

Question is I ordered lactic acid and citric acid and ro water
Coming to mix I have dosages of

125ml lactic
75ml citric
50ml water
Based on % and 250ml bottle volume

But citric acid needs to be dissolved in water prior to adding and I’d need to make sure 30% citric acid is added, I can’t do this without mixing more water than recipie needs as the citric is a powder ? So how can I do this while staying in calculation of dosage

If I add it alone it won’t dissolve will it ? It needs heating and am I sure about heating the lactic acid