A 0.25*L0.25⋅L volume of 0.010*mol*L^-10.010⋅mol⋅L−1 concentration was obtained by diluting a WHAT volume of a mother solution of 0.50*mol*L^-10.50⋅mol⋅L−1 concentrations?

1 Answer
anor277
Apr 11, 2017

We need a volume of.........5.0*mL5.0⋅mL

Explanation:

The product "concentration"xx"volume"concentration×volume has units of "moles per litre"xx"litre"moles per litre×litre, i.e. clearly an answer in "moles"moles................

And thus, since we dilute a given molar quantity of solute...........

C_1V_1=C_2V_2C1V1=C2V2

We solve for V_1V1, and thus we solve..........

V_1=(C_2V_2)/C_1=(0.010*cancel(mol)*cancel(L^-1)xx0.25*cancelL)/(0.50*mol*L^-1)=0.0050*L-=0.005(1/(1/L))=5.0xx10^-3L=5.0*mL.

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