Topic: Storing sodium fluoride solution (Read 9197 times)

ceres · « **on:** August 08, 2009, 10:00:30 PM »

Can someone help me with this question:

Why is the standard sodium fluoride solution is stored in the polyethylene bottle and not in a glass bottle?

Thanks in advance!

zxt · « **Reply #1 on:** August 09, 2009, 01:26:12 AM »

Because F^-+H₂O ::equil::HF+OH^- and HF corrodes glass. 4HF+SiO₂ :rarrow:SiF₄+2H₂O

ceres · « **Reply #2 on:** August 10, 2009, 06:47:25 AM »

Thanks!!

mewrox99 · « **Reply #3 on:** August 15, 2009, 06:23:37 AM »

wow does NaF hydrolyze under water. I know it would with a strong acid like H2SO4. Is that why i feel strange after eating toothpaste

BluRay · « **Reply #4 on:** August 15, 2009, 10:26:27 PM »

Quote from: mewrox99 on August 15, 2009, 06:23:37 AM

wow does NaF hydrolyze under water. I know it would with a strong acid like H2SO4. Is that why i feel strange after eating toothpaste

In dilute solution, HF is a weak acid (Ka ~ 3.5*10^-4) so F^- is (slightly) basic:

F^- + H₂O --> HF + OH^-

Topic: Storing sodium fluoride solution (Read 9197 times)

ceres

Storing sodium fluoride solution

zxt

Re: Storing sodium fluoride solution

ceres

Re: Storing sodium fluoride solution

mewrox99

Re: Storing sodium fluoride solution

BluRay

Re: Storing sodium fluoride solution

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