Simple questions on solutions concentration and pH

jammon

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

Moonbear

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.