Question

PFTV 0.005 1. You need to prepare 10.0 mL of diluted Cuso, solutions with the concentrations listed for Trials 1 through 4 in the table below. Before coming to lab, determine what volumes of 0.040 M Cuso, stock solution and H.O need to be mixed together. Fill in the table with the volumes you determined. xod nog 200.0" ( Jon o t olsa won blu de bord Trial 0.040 M HOT Diluted Number CuSO, Uw sowi luo (M) rozato 0.0050 osilidt gond 2 0.010 30 D3 0.020 0.030 Soudtoda a 5 stock solution 0.0402 fotolog si bo 02 ba ionito (ML) Concentration (mL)

Answer 1

Diluted Concentration (M) Trial 0.040 M H,O Number Cuso (mL) (mL 1.25 ml 8.75 ml 2 2.5 ml | 7.5 ml 35 ml - 35 ml 4 7.5 ml 2.5 ml stock solution 0 0.0050 0.010 0.020 0.030 .040 0 Using dilution law VI * Si (before dilution) = V2 * S2 (after dilution) V1 * 0.040 M = 10.0 ml * 0.0050 M or V1 = 1.25 ml thus volume of stock solution = 1.25 ml volume of water = (10 -1.25) = 8.75 ml