September 19, 2020, 12:27:58 PM
Forum Rules: Read This Before Posting


Topic: Hydrochloric acid / HCL formula  (Read 3493 times)

0 Members and 1 Guest are viewing this topic.

Offline m4unot

  • New Member
  • **
  • Posts: 3
  • Mole Snacks: +0/-1
Hydrochloric acid / HCL formula
« on: March 02, 2011, 08:52:13 PM »
I would like to produce/make hydrochloric acid: HCl

- I mixed NaCl and H2SO4 (sodium chloride and sulphuric acid) and got HCL, but

is the formula:


NaCl + H2SO4 - > HCL,

NaCl + H2SO4 - > HCL + HSO4,  

NaCl + H2SO4 - > HCL + NaHSO4

or something else and why?


Ps:

Since I've used first: NaCl and then mixed it with H2SO4, I think it is: NaCl + H2SO4 and because I got: HCl:

NaCl + H2SO4 => HCL, but I am unsure.

I'm trying to learn chemistry alone  :-\
« Last Edit: March 02, 2011, 09:03:56 PM by m4unot »

Offline rabolisk

  • Chemist
  • Full Member
  • *
  • Posts: 494
  • Mole Snacks: +45/-25
Re: Hydrochloric acid / HCL formula
« Reply #1 on: March 02, 2011, 10:06:45 PM »
In an aqueous solution of HCl, there is really no HCl, only H3O+ and Cl-. Adding NaCl to H2SO4 doesn't really do anything. There will be sodium ions, chloride ions, plenty of protons, and bisulfate ions. In a sense you do have HCl, but it is dissociated.

Offline m4unot

  • New Member
  • **
  • Posts: 3
  • Mole Snacks: +0/-1
Re: Hydrochloric acid / HCL formula
« Reply #2 on: March 03, 2011, 08:09:53 AM »
In an aqueous solution of HCl, there is really no HCl, only H3O+ and Cl-. Adding NaCl to H2SO4 doesn't really do anything. There will be sodium ions, chloride ions, plenty of protons, and bisulfate ions. In a sense you do have HCl, but it is dissociated.

Have you seen this:

Quote

Ps:

Since I've used first: NaCl and then mixed it with H2SO4, I think it is: NaCl + H2SO4 and because I got: HCl:

NaCl + H2SO4 => HCL, but I am unsure.

I'm trying to learn chemistry alone  :-\

I asked if this how I describe the process, the way I have worked ?

If not, can you describe how? - And where can I read more about it.

Offline 408

  • Chemist
  • Full Member
  • *
  • Posts: 796
  • Mole Snacks: +103/-30
Re: Hydrochloric acid / HCL formula
« Reply #3 on: March 03, 2011, 09:33:54 AM »
Rabolisk is correct when dilute.

But add NaCl to conc. H2SO4 and watch the HCl vapour fume off.
The original poster did not mention being in solution, so I will assume neat reagents are being used.

Whether Na2SO4 or NaHSO4 forms as byproduct is determined by the stoichiometry and the temperature. 

Offline m4unot

  • New Member
  • **
  • Posts: 3
  • Mole Snacks: +0/-1
Re: Hydrochloric acid / HCL formula
« Reply #4 on: March 03, 2011, 10:17:20 AM »
I mixed table salt and hydrogen sulfate with 20 ml of water in the bottle, I turned on the heat, it started to boil, etc. ..

My whole point is how I describe the way I've worked with - in formulas.

Is:

NaCl + H2SO4 => HCL , right or wrong and why?

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7521
  • Mole Snacks: +525/-88
  • Gender: Male
Re: Hydrochloric acid / HCL formula
« Reply #5 on: March 04, 2011, 01:25:28 AM »
If you use solid NaCl and concentrated H2SO4:
Room temperature
NaCl +H2SO4 = HCl(g) + NaHSO4
When heating over 100 C:
2NaCl + H2SO4 = 2HCl(g) + Na2SO4
When a large excess of H2SO4  is used
H2SO4  + Na2SO4 = 2NaHSO4
« Last Edit: March 04, 2011, 03:01:39 AM by AWK »
AWK

Sponsored Links