Question

How many milliliters of a 5.0 MM sodium chloride solution is required to prepare 50. mL of 2.0 uM solution? Do not include units in the answer. Your answer should have two significant figures. (Round to the nearest whole number.) Provide your answer below:

Answer 1

20 ml of 5.0 $\mu$M NaCl is required

Molarity (m) = No. of moles vot of solution (V) (ان) No. of moles & M. v We know No. of moles is not affected by dilution so, M, V = M2 Vz M. = 5.0MM M₂ = 2.0MM V = ? V2 = 50ml 5 xv = 2 x 50 V = 2x50 ml 5 Tv = 20ml