what volume of 2% potassium pomegranate solution is required in order to provide 200ml of 75mg/5ml potassium permanganate solution?
The approach below is what I have received from other tutors, but I do not understand how or why has 2% been written as 2000mg/100ml? because my understanding of 2% is this (0.02)
Answer from other tutors:
75mg/5ml -> need 200ml -> 75mg x 200/5 = 3000mg
2% solution = 2000mg/100ml
we need 3000mg
= 100ml x 3000mg/2000mg
we need 150ml of potassium pomengranate to make 200ml of 75mg/5ml potassium pomengranate solution