Thanks emilyhobbes, really helpful! Can anyone help me with this question? Its pretty long
Hydrogen peroxide added with potassium permanganate...
Equation: 2MnO4(-) +5H2O2 +6H+ ==> 2Mn(2+) +8H2O +5O2
a) The label on the bottle of the solution of hydrogen peroxide says it is 10.0%, by mass, hydrogen peroxide, and has a density of 1.19 gmL-1. Show that this data is consistent with a concentration of 3.50 M
^I've just completed this question, I did this:
1000 x 1.19 = 1190g
therefore 10% of 1190 is 119g
n(H2O2)= 119/34 = 3.50 mol
c(H2O2)=3.50/1 = 3.50 M
I STILL NEED HELP WITH THIS, PLEASE:
b) 20.00 ml of this solution is pipetted into a 250ml volumetric flask, and the volume is made up to the mark with distilled water. 25.00 ml of this solution is titrated, in the presence of dilute sulphuric acid, with a 0.129 M solution of potassium permanganate, KMnO4.
What volume of the potassium permanganate solution is required for complete reaction of 25.00 ml of the diluted sample?