Register to reply

Chemical reaction leading to salt water

Share this thread:
caters
#19
Aug11-14, 04:44 PM
P: 42
Why isn't the NaCl made from HCl + NaOH + H2O safe to eat? I mean couldn't you just evaporate the water and excess acid or base to get NaCl that is safe to eat?

Or is there a chance that the acid or base will be trapped in the NaCl crystals and thus the NaCl would still not be safe?

And does whether the NaCl in aqueous solution is safe after evaporation or not depend on the amount of water, acid, and base so that a 50/50 mixture of acid and base in aqueous solution means no acid or base left and all that could be trapped in the ionic crystals is H2O whereas if 1 is in excess the NaCl would likewise be acidic or basic in aqueous solution due to the acid or base being trapped in the ionic crystals?
Borek
#20
Aug11-14, 05:20 PM
Admin
Borek's Avatar
P: 23,600
Quote Quote by caters View Post
Why isn't the NaCl made from HCl + NaOH + H2O safe to eat?
Who told you so?
caters
#21
Aug11-14, 05:54 PM
P: 42
Videos I have watched on making sodium chloride from an acid and a base including one with HCl and NaOH(solid pellets of NaOH mixed with aqueous HCl) said "Sorry but you can't eat the sodium chloride produced from this reaction"

Another one used sodium bicarbonate(baking soda) and HCl and got instead of just NaCl(aq) got NaCl(aq) + CO2 and said the same thing, that is that you can't eat the sodium chloride that is produced.

Video with NaOH and HCl: https://www.youtube.com/watch?v=erWTsWut7Vc

Video with NaCHO3 and HCl: https://www.youtube.com/watch?v=ljvXt0c2rYA
Borek
#22
Aug12-14, 01:31 AM
Admin
Borek's Avatar
P: 23,600
Most likely they simply don't want to be sued in case some idiot does something stupid and decides it is their fault.

To be sure you are on the safe side you would need to use food grade reagents and control the final pH, but NaCl prepared this way doesn't differ from NaCl prepared by any other means.
caters
#23
Aug12-14, 03:09 AM
P: 42
Quote Quote by Borek View Post
Most likely they simply don't want to be sued in case some idiot does something stupid and decides it is their fault.

To be sure you are on the safe side you would need to use food grade reagents and control the final pH, but NaCl prepared this way doesn't differ from NaCl prepared by any other means.
So no matter how I form NaCl it is unlikely that the acid or the base would get trapped in the ionic crystal that forms as I evaporate the solution even if there is still acid or base in the solution and not just H2O and NaCl?
Borek
#24
Aug12-14, 03:25 AM
Admin
Borek's Avatar
P: 23,600
It is unlikely that more than traces are trapped, especially if you don't evaporate the solution to dryness. Besides, controlling pH you can be sure amount of acid/base left is negligible.


Register to reply

Related Discussions
Salt water and tap water conducting electricity - help appreciated Classical Physics 7
Nuclear reaction leading to formation of C^14 ? Nuclear Engineering 5
Why anhydrous salt is less soluble in water than hydrous salt Biology, Chemistry & Other Homework 1
Unusual Salt-Water Reaction? General Discussion 50
Chemical Reaction between water and chlorine Biology, Chemistry & Other Homework 5