https://padlet.com/usictech/2z9e3ygjolhy7k3l Made with good vibes en-us 2021-09-28 10:05:57 UTC 2022-03-22 22:34:48 UTC hello@padlet.com usictech https://padlet.com/usictech/2z9e3ygjolhy7k3l/wish/1516873491 10 x 25 = [C₂] x 500, therefore: [C₂] = (10 X 25) / 500 = 0.5 µg ml and therefore: 0.5 x 1000 = 500 ng ml^-1]]> 2021-05-12 10:00:51 UTC https://padlet.com/usictech/2z9e3ygjolhy7k3l/wish/1516873491 usictech https://padlet.com/usictech/2z9e3ygjolhy7k3l/wish/1516875243 A) The dilution factor for KCl is 20-fold. To prepare the solution, use 0.050 ml ( ≡ 50.0 µl) of KCl stock solution, plus 0.950 ml ( ≡ 950.0 µl) of water.

B) The dilution factor for NaCl is 40-fold and the dilution factor for glucose is 10-fold. To prepare the solution, use 1.25 ml of NaCl stock solution, 5.00 ml of glucose stock solution and 43.75 ml of water.

C) The dilution factor for NaCl is 20-fold, the dilution factor for KCl is 80-fold, the dilution factor for CaCl₂ is 4-fold and the dilution factor for glucose is 20-fold. To prepare the solution, use 5.00 ml of NaCl stock solution, 1.25 ml of KCl stock solution, 25.00 ml of CaCl₂ stock solution, 5.00 ml of glucose stock solution and 63.75 ml of water.

D) First, convert the required concentrations to the same units as those of the stock solutions. In this case, µmol ml-1 and mmol l-1 are directly equivalent, (divide by 10³ to convert from µmol to mmol, then multiply by 10³ to convert from ml to l) so the numerical values remain the same. The dilution factor for NaCl is 5-fold, for CaCl₂ it is 8-fold and for KCl it is 10-fold. To prepare the solution, use 2.00 ml of NaCl stock solution, 1.25 ml of CaCl₂ stock solution, 1.00 ml of KCl stock solution and 5.75 ml of water.

E) First, convert the glucose concentration from nmol ml^-1 to mmol l^-1 (divide by 10⁶ to convert nmol to mmol and multiply by 10³ to convert ml to l), giving glucose at 0.2 mmol l^-1 (all other concentrations are in the same units as those of the stock solutions). The dilution factor for Cacl₂ is 20-fold, for KCl is 4-fold and for glucose is 25-fold. To prepare the solution, use 1.25 ml of CaCl₂ stock solution, 6.25 ml of KCl stock solution, 1.00 ml of glucose stock solution and 16.50 ml of water. 

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