Question

Problem 8.40 1 Review Part A How many liters of half-normal saline IV solution with a concentration of 0.45% (m/v) can be prepared from 3.0 L of a 7.5% (m/v) stock solution? Express your answer in liters to two significant figures. AED 0 Volume = Submit Request Answer Provide Feedback

Answer 1

We have 32 of 7.5% (m/v) Stock solution and we want to have 0.45% (m/v) solution (mass.to), X Volume = (mass.f.) x Volume Diluted soln. 7.5 X 3L = (massto) stock "0.45X V

Nolume = 50L So, we will have 501 of 0.45.1. (m/v) solution Normality of this solutios; solute - Naci (salire) Molar massa equivalent mass = 58.5g/mol N = mass - 2258 eg. mass x Volume 58.5 x 50L Gegmoil 0.45.1. (m/v) 100ml of solution contains 0.459 salena 50 boomL O H59 X 50 ODOL (502) loome = 2259 Saline IN=0.07692 NI We want to have & N Salire; NV = M2 V₂ We have we want to have 0.07692 x 50L = IN XV N V= 7.6923 [V = 7.7L 7.76 of 2N can be prepared