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we have 10m 32% of HCL. I have never had to make up 0.05m very weak. Can some kind soul, please tell me the amount of Conc HCL I need to make up 200ml of 0.05m.

Hi Pommy,

Using the formula; M1 x V1 = M2 x V2 where M= is concentration and V= volume (mL)

10M x V1 = 0.05M x 200 > V1 = (0.05 x 200)/ 10M > V1 = 1mL

So you need 1mL of your 10M HCl in 200mL of H2O to make your 0.05M solution!

Good Luck,
Sassi

Sassi, just beat me to it. Yes, Sue, that is correct.
Have a nice day
Lada

I would Dilute to 1M Eirst 10 to 1 then dilute to 0.05 20 to 1 always adding acid to water never add water to acid it can boil and splash you

Thank you, you see I had a holiday, think my mind is still on holiday. Some times.

Hi
I had a request last week for 25mLs of 0.001M of HCl, NaOH and acetic acid, hardly seemed worth the effort.
Estelle

Great was that 1 student doing something or a demo?