Does Le chatlier's law apply if reactants are liquids and a product is solid?

Click For Summary

Discussion Overview

The discussion revolves around the application of Le Chatelier's principle in a chemical reaction involving sodium thiosulfate and hydrochloric acid, where the reactants are liquids and a product is a solid. Participants explore whether changes in concentration can shift the equilibrium and the reversibility of the reaction.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant suggests that increasing the concentration of sodium thiosulfate would shift the equilibrium to the left, implying a breakdown of excess reactants to produce more product according to Le Chatelier's law.
  • Another participant states that the amount of solid does not affect the equilibrium position, indicating that adding more solid will not shift the equilibrium.
  • A participant questions the reversibility of the reaction, expressing uncertainty about discussing equilibrium shifts if the reaction is not reversible.
  • It is noted that every reaction is somewhat reversible, with a specific mention that the reverse reaction is used to produce thiosulfates in alkaline solutions.
  • One participant mentions that the sulfur precipitating out as a colloid suggests some level of reversibility, but starting with lumps of sulfur may complicate the reaction dynamics.

Areas of Agreement / Disagreement

Participants express differing views on the applicability of Le Chatelier's principle in this context, particularly regarding the effects of solid products on equilibrium and the reversibility of the reaction. No consensus is reached on these points.

Contextual Notes

There is uncertainty regarding the reversibility of the reaction and the implications of solid products on equilibrium shifts. Participants also express varying levels of understanding about the principles involved.

Who May Find This Useful

This discussion may be useful for students and individuals interested in chemical equilibrium, reaction dynamics, and the application of Le Chatelier's principle in non-gaseous systems.

kenshi64
Messages
32
Reaction score
0
Hi So the reaction is below:
Sodium thiosulfate + HCl = Sulfur + NaCl+ Water+ SO2

So if I wanted to say 'Increasing the conc. of Sodium thiosulfate has shifted the equilibrium to the left (reactants) and thus the system works to break down excess reactants and create more product by Chatlier's law' Would this be factually right?

I'm wondering because the example equation on Wikipedia consists of all gases. Thanks in advance! Cheers! :D
 
Chemistry news on Phys.org
Amount of solid doesn't matter (that is, putting more solid into the system will no shift the equilibrium), but changing concentrations has similar effect to changing pressure.
 
Borek said:
Amount of solid doesn't matter (that is, putting more solid into the system will no shift the equilibrium), but changing concentrations has similar effect to changing pressure.

Sorry, before I go ahead, Is the reaction reversible? I seem to have made a stupid assumption that I can talk about the equilibrium shifting to remove excess reactants when it mayn't be a reversible reaction. How do I know if it is one? THanks Borek
 
To some extent every reaction is reversible. In this particular case reverse reaction is what is used to produce thiosulfates (although it is done in alkaline solutions).
 
Oh god, alas, another experiment down the drain.. Thank you!
 
Uh, with the sulphur precipitating out as a colloid, the reaction is some-what reversible. Starting with lumps of sulphur is a different matter. You'd probably need an ultrasonic bath to mobilise the surface reaction...
 
Nik_2213 said:
Uh, with the sulphur precipitating out as a colloid, the reaction is some-what reversible. Starting with lumps of sulphur is a different matter. You'd probably need an ultrasonic bath to mobilise the surface reaction...

I appreciate that!, But unfortunately I'm just a 12th grader and I don't have that kind of stuff.
 

Similar threads

Replies
3
Views
3K
Replies
3
Views
10K