Question

if I want 25ml of 10% solution and my stock solution is 50% ,How many ML do I need of stock?How many ML do I need of diluent ?

Answer 1

Dilution: A dilution is a solution made by adding more to a more concentratecd Solution (stock solution), which veduces the concentvation of the solute The Primary reas on you start with a concentra tedi solution and then dilute ' it's very difficut (sometimes impossi ble) to accurately measuresoluteto pYepare a dilute solution, So the re it to mak e a dilutio, 's that be a large degree of evrov in the concen tration value . Youuse the aw of Conservation oFmass to Pey Fom the calculatio, for the dilution Mdilutio ilutio Mdiun Molavity or Concentration of dilute solut/on Mstox rtolavty o concentration of stock solution. Vdilutiv, volume of dilute solution - Mstoc =volume of stocK soluti on . Stock

S0lution: Calclate volume o Stock Solution: dilution 10η 25 m L 50% 'Stock Vs tock - l0 x 25 m L So 250 mL s s m volume of stock solution = 5mL