I have the following equation, based on the reaction of $\ce{SiO2}$ with $\ce{HF}:$

$$\ce{SiO2 + HCl -> SiCl4 + 2 H2O}$$

I want to know if this reaction is indeed feasible, what conditions may be needed to induce it, or if it isn't possible why that's the case.

  • 2
    $\begingroup$ No, HCl does not etch SiO2 appreciably. $\endgroup$ – Jon Custer Jun 26 at 18:39
  • 3
    $\begingroup$ You can store HCl in a glass bottle. Please don't do that with HF. $\endgroup$ – Jon Custer Jun 26 at 18:43
  • 2
    $\begingroup$ Well, Cl is very much not like F. For this reason, the reaction is totally impossible. Or rather, it will go quite readily, only backwards. $\endgroup$ – Ivan Neretin Jun 26 at 18:53
  • 1
    $\begingroup$ @faissaloo - in grad school somebody really messed up a hood by being lazy and pouring HF waste into the (glass) waste bottle sitting there (for aluminum etchant). What a mess to clean up! $\endgroup$ – Jon Custer Jun 26 at 19:03
  • 1
    $\begingroup$ Well, they are different chemical elements; isn't that enough of a justification for any of their properties to be different? In particular, size matters. F is small, which makes the formation of $\ce{SiF6^2-}$ possible and even desirable. Not so with Cl. $\endgroup$ – Ivan Neretin Jun 26 at 19:56

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.