Answer:
84.0 ppm is the concentration of Red 40 dy in the original sports drink.
Explanation:
Concentration of red dye in sport drink before dilution [tex]C_1=?[/tex]
Volume of the sport drink before dilution [tex]V_1=5.4 mL[/tex]
Concentration of red dye in sport drink after dilution [tex]C_2=18.1 ppm[/tex]
Volume of the sport drink after dilution [tex]V_2=25.0 mL[/tex]
[tex]C_1V_1=C_2V_2[/tex]( dilution )
[tex]C_1=\frac{C_2V_2}{V_1}=\frac{18.1 ppm\times 25.0 mL}{5.4 mL}[/tex]
[tex]C_1=83.80 ppm\approx 84.0ppm[/tex]
84.0 ppm is the concentration of Red 40 dy in the original sports drink.
