Homework Help

If a student adds HCl to a mixture of SiO2, NaCl, CaCO3, will they eventually be able...

user profile pic

eeknotes | Student | eNotes Newbie

Posted September 28, 2010 at 4:52 AM via web

dislike 1 like

If a student adds HCl to a mixture of SiO2, NaCl, CaCO3, will they eventually be able to separate out the pure components?

 

1 Answer | Add Yours

user profile pic

william1941 | College Teacher | Valedictorian

Posted September 28, 2010 at 7:28 PM (Answer #1)

dislike 1 like

I can't understand what you mean by separate out the pure components. If HCl is added to the mixture of SiO2, NaCl and CaCO3:

  • HCl does not react with SiO2. This is why HCl can be stored in glass bottles.
  • You are not going to use 100% concentrated HCl, so it will have some water. The NaCl will dissolve in the water in the dilute HCl.
  • With CaCO3, HCl reacts as follows

CaCO3(s) + 2 HCl (aq) --> CaCl2 (aq) + CO2 (g) + H2O (l)

So, when you add HCl to the mixture one of the components would react to give a different compound, one does not react and the third would dissolve upto a certain limit.

 

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes