Im currently doing experiments involving chlorine solutions of 1.2mg/l and I need to know how much sodium thiosulphate to add per litre to neutralise the chlorine. I've always been terrible at working out these sorts of things and I can't afford to get this wrong - anyone have any idea?

4 NaClO + Na2S2O3 + 2 NaOH → 4 NaCl + 2 Na2SO4 + H2O

1.2 mg/L × (1g/1000mg) x (1/MW Bleach) x (1mol Thiosulfate / 4 mol Bleach) x MW Thiosulfate

MW = molecular weight

Final result wI'll be g/L thiosulfate

This post was edited by Thor123422 on Sep 7 2016 12:19pm

I think my sterile technique may suffer from leaving my chlorine solutions to evaporate outside



Muchos gracias

Thanks for clarifying your chlorine solution isn't for drinking purpose.

I clarified that I was using sodium thiosulphate to neutralise.

De nada, latino



There's a few better ways to neutralise this compound

Add NaCl to taste.

I just made myself infertile for life.

T4t