sh415
Posts: 2
Joined: Sat Jul 04, 2020 5:59 pm
Occupation: Student

Lowering pH of sodium hypochlorite

Postby sh415 » Sat Jul 04, 2020 6:09 pm

Hello :) I would like to lower the pH of sodium hypochlorite (with vinegar) to reach the required pH of Hypochlorous acid presence. Is there anything I need to be cautious of (e.g. byproducts, heat, etc.)? Thanks.

charlesg
Expert
Posts: 37
Joined: Thu Apr 18, 2019 7:51 am
Occupation: Other Adult

Re: Lowering pH of sodium hypochlorite

Postby charlesg » Sun Jul 05, 2020 10:34 am

Hi sh415,

Combining bleach (sodium hypochlorite) with an acid (such as vinegar) will release chlorine gas, which is highly toxic. I would advise against doing so.

This forum is intended for students, parents, and teachers working on K-12 science projects. If your question is related to a science project, please post some details such as your hypothesis, research question or experimental plan.

Best,
Charles

sh415
Posts: 2
Joined: Sat Jul 04, 2020 5:59 pm
Occupation: Student

Re: Lowering pH of sodium hypochlorite

Postby sh415 » Wed Jul 08, 2020 4:10 pm

I will only acidify very diluted bleach in a ventilated space. What is the equation for vinegar and bleach that shows Cl2 gas as a byproduct?

charlesg
Expert
Posts: 37
Joined: Thu Apr 18, 2019 7:51 am
Occupation: Other Adult

Re: Lowering pH of sodium hypochlorite

Postby charlesg » Sun Jul 12, 2020 2:09 pm

2HOCl + 2HAc ↔ Cl2 + 2H2O + 2Ac- (Ac : CH3COO)

Source: https://www.thoughtco.com/mixing-bleach ... gar-609281

What are you trying to achieve with this? What is your science project or hypothesis?


Return to “Grades 9-12: Physical Science”