My sumptuous padlet by Usic https://padlet.com/usictech/mycd9psbeslz02u9 Made with love en-us 2022-02-17 13:33:25 UTC 2022-02-17 13:34:13 UTC hello@padlet.com Q2 usictech https://padlet.com/usictech/mycd9psbeslz02u9/wish/2053179706 Suppose you had the following stock solutions:

NaCl 100.0 mmol l-1

KCl 200.0 mmol l-1

CaCl2 160.0 mmol l-1

C6H12O6 (Glucose) 5.0 mmol l-1

Calculate the volumes of each stock solution and the volume of water required to prepare each of the following (answer in each case to 3 significant figures and show your working out):

a) 1.0 ml of a solution containing only KCl at 10.0 mmol l-1

b) 50 ml of a solution containing NaCl at 2.5 mmol l-1 and glucose at 0.5 mmol l-1

c) 100 ml of a solution containing NaCl at 5.0 mmol l-1, KCl at 2.5 mmol l-1, CaCl2 at 40.0 mmol l-1 and glucose at 0.25 mmol l-1

d) 10 ml of a solution containing NaCl, CaCl2, and KCl, all at 20.0 µmol ml-1

e) 25 ml of a solution containing CaCl2 at 8.0 mmol l-1, KCl at 50.0 mmol l-1, and glucose at 20.0 nmol ml-1



]]> 2022-02-17 13:33:25 UTC https://padlet.com/usictech/mycd9psbeslz02u9/wish/2053179706 Q1 Complete the following calculations and express your answers to three significant figures: If you added 25 ml of an aqueous solution of DNA at 10 µg ml-1 to a final volume of 500 ml, what would be the final concentration of DNA, in ng ml-1? Show full working out, correct units and correct number of significant figures. usictech https://padlet.com/usictech/mycd9psbeslz02u9/wish/2053179711 Formula = [C1]V1 = [C2]V2]]> 2022-02-17 13:33:25 UTC https://padlet.com/usictech/mycd9psbeslz02u9/wish/2053179711