Answer:
58.9mL
Explanation:
Given parameters:
Initial volume  = 34.3mL   = 0.0343dm³
Initial concentration Ā = 1.72mM Ā = 1.72 x 10ā»Ā³moldmā»Ā³
Final concentration Ā = 1.00mM = 1 x 10ā»Ā³ moldmā»Ā³
Unknown:
Final volume Ā =?
Solution:
Often times, the concentration of a standard solution may have to be diluted to a lower one by adding distilled water. To find the find the final volume, we must recognize that the number of moles of the substance in initial and final solutions are the same.
Ā Ā Therefore;
Ā Ā Ā Ā Ā Ā Ā CāVā Ā = Ā CāVā
where C and V are concentration and 1 and 2 are initial and final states.
Ā Ā Ā Ā now input the variables;
Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā 1.72 x 10ā»Ā³ x Ā 0.0343 = 1 x 10ā»Ā³ Ā x Vā
Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Vā = 0.0589dm³ = 58.9mL
Ā Ā Ā Ā Ā