Question

You are given a large bottle of a glucose stock solution at a concentration of 0.900 M, and are asked to prepare 250mL of a 0.15 M glucose solution. How many mL of water and of the stock solution are needed to accomplish this task?

Answer 1

Moles d glucose iw 25O mL dr 0.15 mel M solutiou 0.15 mol X 250 mL 0.0375 md (000 t Noto 0.g00 mol glucose is iw 1000 mL stock solution . 0.0375 (000x 0.0375 mL tuck solution 0.400 41.G7 mL stock solution .. Amount ob water needed (250-41.67) mL 208,33 mL ..|208.33 mL water 4l.67 mL stock solutiou and ле needed to accomplish the task Page-!

Altennate solution page-2 We can we the diution equation hene MIV M2V2 whene, Mmolarity d toget soluthon volume d tonget solutiou M2-molanity d otock solution volume dstock solution Hene, Mi0.15 M M2 0.900 M Vi - 250 mL 0.900 M x 0.15 M x 250 mL = 0.15 MX250 mL 41.67 mL 0.400 M 41. 67 mL : Volume d stock soluctiou needed (250 -41.67) mL 208.33 mL Volume dwater needed