## pH of combined chemicals

Chemistry and homework help forum.

Organic Chemistry, Analytical Chemistry, Biochemistry, Physical Chemistry, Computational Chemistry, Theoretical Chemistry, High School Chemistry, Colledge Chemistry and University Chemistry Forum.

Share your chemistry ideas, discuss chemical problems, ask for help with scientific chemistry questions, inspire others by your chemistry vision!

Please feel free to start a scientific chemistry discussion here!

Discuss chemistry homework problems with experts!

Ask for help with chemical questions and help others with your chemistry knowledge!

Moderators: Xen, expert, ChenBeier

Jricer3
Newbie
Posts: 2
Joined: Fri Jan 21, 2022 10:06 pm

### pH of combined chemicals

I’m struggling figuring out how the water in this affects the pH levels. Can someone please explain the effects. Also what would be the expected total pH?

KMnO₄ 114 grams +
NaOH 360 grams +
H2O 1 gallon
Modify message
ChenBeier
Distinguished Member
Posts: 1425
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

### Re: pH of combined chemicals

1 gal = 3,78 l
360 g NaOH/3.78 l = 95,23 g/ l = 2,3 mol/l
pH = 14,36 what means high alcaline solution.
Permanganate has no influence.
Jricer3
Newbie
Posts: 2
Joined: Fri Jan 21, 2022 10:06 pm

### Re: pH of combined chemicals

I thought pH of sodium hydroxide was 14 at most. How does it go up in 1 gallon of water? And potassium perm at a pH of 7 does effect the solution?
ChenBeier
Distinguished Member
Posts: 1425
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

### Re: pH of combined chemicals

pH is defind as negative logarithm of activity of hydrogen ions.
The pOH is the same of hydroxide ions.

pH of NaOH is 14 if the Concentration is 1 mol/l

You have 2,3 mol/ l so it's higher,

As I wrote Permanganate has no influence of pH.
tranquilpoof
Newbie
Posts: 1
Joined: Thu Oct 05, 2023 7:26 pm
Contact:

### Re: pH of combined chemicals

Actually the reaction of the equation is quite difficult. Thank you for sharing the recipe. Easy to find out accurate results
ChenBeier
Distinguished Member
Posts: 1425
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

### Re: pH of combined chemicals

There is nothing difficult. Its only a dissolving of NaOH and KMnO4 in water. The rest is already said.
tommchris
Newbie
Posts: 1
Joined: Tue Oct 24, 2023 7:23 pm

### Re: pH of combined chemicals

Depending on the chemicals involved, their effects on pH may be additive or not. For example, if you mix a strong acid with a strong base, the resulting pH will be determined by the excess of either the acid or the base.
ChenBeier
Distinguished Member
Posts: 1425
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

### Re: pH of combined chemicals

But this not a case here. Don't fill the server with rubbish.