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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: Fakes on February 05, 2019, 04:14:31 AM

Title: Measuring pH of reverse osmosis's water
Post by: Fakes on February 05, 2019, 04:14:31 AM
I know that it should be acidic. But when i am measuring it in 2 different bench pH meters the result is 9 (in both) and when i measure it using a pH paper strip it is around 6. Any ideas?
Title: Re: Measuring pH of reverse osmosis's water
Post by: chenbeier on February 05, 2019, 05:45:38 AM
A pH probe needs conductivity. DiI-water or reversd osmoses water cannot measured like this. You have to add a little bit NaCl or other neutral salt to the water and measure again.