M1v1=m2v2
M1 =molarity of working solution= 1 M
V1 = volume of working solution = 275 ml
M2 = molarity of stock solution = 5 M
V2 = volume of stock solution needed to make the 1M working solution = x
V2= x = m1v1/ M2
=( 1* 275 ) / 5
= 275/5
= 55ml
Volume of stock solution needed to prepare the 1mole working solution = 55ml
55ml of 5M stock solution + 220 ml of distilled water
= 275 ml of 1M working solution
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