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What is the molarity of each of the following solutions? a. you pipet 20.00ml of

ID: 605615 • Letter: W

Question

What is the molarity of each of the following solutions? a. you pipet 20.00ml of 0.0600M CuCl2 into a 100.00ml volumetric flask and fill to the mark. >>>>I got 0.012M for this one but Im stuck on how to do the following: b. you pipet 10.00ml of the solution from part (a) in a twenty five volumetric flask and dilute to the mark. c. you pipet 5.00ml of the solution from part (b) into a beaker and then pipet ten ml DI water into beaker (assume volumes are additive) please help/show me how to do this correctly! :)

Explanation / Answer

b) 10 ml of 0.012 M means 0.012 x10/1000 =0.00012 moles vol now = 25 ml in new flask so molarity = 0.00012 x1000/25 =0.0048 M 5 ml of 0.0048 M = 0.0048 x5/1000 =0.000024 moles 10 ml water added, so total vol now = 15 Molarity = 0.000024 x 1000/15 = 0.0016 M

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