C1v1 = c2v2
20% x v1 = 30ml x 5%
V1= 30ml x 5%/20%
V1= 30 ml x 0.05/0.2
= 0.25 x 30 ml
= 7.5 ml
Chapter 11: Solutions, Prs stice Questions: How much ofa 20% solution would you need to make 30 mL of a 5% solution...
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