Answer :
Answer:
The amount of drug required = 44.44 mL
Diluent needed = 355.56 mL
Step-by-step explanation:
Data provided in the question:
Total volume of solution = 400 mL
Concentration of drug = 1 : 8
Now,
The ratio is interpreted as 1 part of drug and 8 part of diluent
Thus,
The amount of drug required = [tex]\frac{1}{1+8}\times\textup{Total volume of solution}[/tex]
or
The amount of drug required = [tex]\frac{1}{1+8}\times\textup{400 mL}[/tex]
or
The amount of drug required = 44.44 mL
and,
Diluent needed = [tex]\frac{8}{1+8}\times\textup{400 mL}[/tex]
or
Diluent needed = 355.56 mL