SOLUTION: you have 100mL of distilled water and you need to add 20% chlorhexidine solution so that you have a 100mL solution of 0.05% of chlorhexidine. How much chlorhexidine should you add

Question 700975: you have 100mL of distilled water and you need to add 20% chlorhexidine solution so that you have a 100mL solution of 0.05% of chlorhexidine.
How much chlorhexidine should you add?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
you have 100mL of distilled water and you need to add 20% chlorhexidine solution so that you have a 100mL solution of 0.05% of chlorhexidine.
:
Let x = amt of chloro-something required
:
.20x = .05(x+100)
.20x = .05x + 5
.20x - .05x = 5
.15x = 5
x = 5/.15
x = 33 mL of chloro-something required
:
:
Check this
.20(33.33) = .05(133.33)
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