My sumptuous padlet by Usic https://padlet.com/usictech/7auw0oarqws70ntk Made with love en-us 2021-05-12 09:54:42 UTC 2023-02-14 22:54:29 UTC hello@padlet.com 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/7auw0oarqws70ntk/wish/1516865209 Formula = [C1]V1 = [C2]V2]]> 2021-05-12 09:56:15 UTC https://padlet.com/usictech/7auw0oarqws70ntk/wish/1516865209 Q2 usictech https://padlet.com/usictech/7auw0oarqws70ntk/wish/1516874096 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



]]> 2021-05-12 10:01:16 UTC https://padlet.com/usictech/7auw0oarqws70ntk/wish/1516874096 HW: https://padlet.com/usictech/7auw0oarqws70ntk/wish/2482276893 1. Given a stock solution of sodium chloride of 2.0 mmol l-1, how would you prepare 250 ml of a 0.5 mmol l-1 solution?

2. You are given a stock solution of concentrated ammonia with a concentration of 17.9 mmol l-1 

(a) What volume of the conc. ammonia is needed to make up 1ml of 1.0 mmol l-1 ammonia solution? 


]]> 2023-02-14 16:56:55 UTC https://padlet.com/usictech/7auw0oarqws70ntk/wish/2482276893 Urvi Kotak https://padlet.com/usictech/7auw0oarqws70ntk/wish/2482674819 2023-02-14 22:54:29 UTC https://padlet.com/usictech/7auw0oarqws70ntk/wish/2482674819