Answer :
Answer:
The concentration is equal to 37.5 ppm
Explanation:
This exercise is about dilutions. We have the following data:
V1 = aliquot volume = 7.5 mL
C1= aliquot concentration = 125 ppm
V2 = final volume = 25 mL
C2 = final concentration of Red 40 dye = unknown
the formula is as follows:
V1xC1 = V2xC2
Clearing C2:
C2 = V1xC1/V2 = (7.5 mL x 125 ppm)/25 mL = 37.5 ppm
The red 40 dye's concentration will be "37.5 ppm".
Volume and concentration:
A solution's concentration seems to be a measurement of how much solute has already been decomposed together in a specified solvent as well as a chemical mixture. This same concentrated solution contains significant amounts of the absorbed component.
According to the question,
Aliquot volume, V₁ = 7.5 mL
Final volume, V₂ = 25 mL
Aliquot concentration, C₁ = 125 ppm
Let,
Final concentration be "C₂".
As we know the relation,
→ V₁ × C₁ = V₂ × C₂
then,
Final concentration will be:
C₂ = [tex]\frac{V_1\times C_1}{V_2}[/tex]
By substituting the values, we get
= [tex]\frac{7.5\times 125}{25}[/tex]
= [tex]37.5[/tex] ppm
Thus the above response is correct.
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