I1 ml o a 0.02% w/v isoproterenol hydrochloride solution is diluted to 10 ml with sodium chloride injection be ore intravenous administration, calculate the percent concentration o the diluted solution

0.002% w/v

Explanation:

The unit w/v means that mass (in g) per volume (in mL). When the solution is diluted, the mass of the solvent will not change, and the mass can be calculated by the concentration (C) multiplied by the volume (V). So, if 1 is the initial solution, and 2 the diluted solution:

C1*V1 = C2*V2

C1 = 0.02%

V1 = 1 mL

V2 = 10 mL

0.02*1 = C2*10

10C2 = 0.02

C2 = 0.002% w/v