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Dilution and concentration of solutions
• Ex: If 50 mL of a 1:20 w/v solution of aluminum acetate is
diluted to 1000 mL, what is the ratio strength w/v?

Solution
1:20= 5%
C1V1 = C2V2
5 (%) X 50 (ml) = C2 X 1000 (ml)
C2= (5*50)/1000 = 0.25% = 1:400