I've been doing some chemical analysis on concrete to determine the chloride content. I've found that a 5g concrete sample is made up of 0.030% chloride. I now need to determine the percentage chloride per weight of cement, which is given as 18% of the concrete (i.e. 0.9g).
I've done the following calulation but I'm not sure if it's correct:
100 / 18 = 5.555555555555556
5.555555555555556 X 0.030 = 0.1666666666666667
And I've taken that last figure as the answer. It seems straightforward but I'm not sure....
I hope I've explained that properly, any help is much appreciated!