Originally Posted by
Something Vague
aw why isn't my brain logical :(
i tried to figure the first one out like this;
500ml of 70% solution + 500ml water = 1000ml 35% solution. so then 50ml = 3.5%. 3.5% into 25% = 7.1. 7.1 x 50ml = 357.
so 357ml of 70% dextrose and 643ml water.
i failed maths?
Ok, I
think the bolded part is right so far. But then 50 ml is one fifth of the 1000 ml, so dividing 35% by 5 = 7% ...hovever now I am thoroughly confused :P I'm not the best at maths either.