Simple questions on solutions concentration and pH


by jammon
Tags: permanganate, solutions, sulfuric
jammon
jammon is offline
#1
Feb12-12, 10:26 AM
P: 4
Hi there, I was wondering if anyone could help me with 3 questions:

1) Without pH papers, how do you calculate the pH of a 5% H2SO4 (sulfuric acid) solution?
I know vinegar is a weak acid, but would a 5% acetic acid have the same pH of a %5 H2So4 solution?

2) If a non-polar solvent such as Hexane is miscible with Ethanol, does that mean that they mix completely? If so, would the water traces from the alcohol stay at the bottom below the Hexane layer?

3) H202 (Hydrogen peroxide) is an oxidizing agent just like Permanganate. I need to replace the later, is it possible to dilute or concentrate Peroxide in order to make it work like Permanganate?
Besides one begin stronger than the other, what other differences are there between these oxidizing agents?

Thanks
Phys.Org News Partner Science news on Phys.org
Lemurs match scent of a friend to sound of her voice
Repeated self-healing now possible in composite materials
'Heartbleed' fix may slow Web performance
Moonbear
Moonbear is offline
#2
Feb13-12, 08:32 AM
Emeritus
Sci Advisor
PF Gold
Moonbear's Avatar
P: 12,257
When you posted, you should have gotten the template for asking homework problems. You need to show your own effort/attempts before anyone will help. We don't do your homework for you here, we help those who are trying to do it themselves to understand it better. Take one question at a time and go back to your class notes and textbook and tell us what relevant information is there to begin with.

Quote Quote by jammon View Post
Hi there, I was wondering if anyone could help me with 3 questions:

1) Without pH papers, how do you calculate the pH of a 5% H2SO4 (sulfuric acid) solution?
I know vinegar is a weak acid, but would a 5% acetic acid have the same pH of a %5 H2So4 solution?

2) If a non-polar solvent such as Hexane is miscible with Ethanol, does that mean that they mix completely? If so, would the water traces from the alcohol stay at the bottom below the Hexane layer?

3) H202 (Hydrogen peroxide) is an oxidizing agent just like Permanganate. I need to replace the later, is it possible to dilute or concentrate Peroxide in order to make it work like Permanganate?
Besides one begin stronger than the other, what other differences are there between these oxidizing agents?

Thanks


Register to reply

Related Discussions
Concentration of Solutions Biology, Chemistry & Other Homework 2
Concentration of Solutions Biology, Chemistry & Other Homework 2
Simple Diff EQ - Modeling the salt concentration of a pond Calculus & Beyond Homework 12
buffer solutions - relating volume and concentration Chemistry 4
Simple Algebra (Concentration) Introductory Physics Homework 4