Sol Dil Review Microscopy Homework 63 B18 Solutions and Dilutions revien Name Av

Question

Sol Dil Review Microscopy Homework 63 B18 Solutions and Dilutions revien Name Avru turner 1. If you wanted to make a 4 M NaCl solution and you wanted a full Liter of it, how would you make it? t? Describe all of the steps. (Remember from lab, molecular weight of NaCI is 58.44 g/mole) ^^ tloa x s'8.uyg-ott vess..egll 2. Now describe how you would dilute this 4 MNaCl solution by a 1:10 dilution- how would you do this? Agaln, make 1 Liter 3. Suppose you wanted a 2:50 dilution of a stock solution, but you wanted 200 mL of it. How would you make this 4 What if you only wanted 10 mlL of the 2:50 dilution- how would you make this solution? 5. LUse the data to prepaure a standand curve. Attach the curve to this Concentration of the standard solutions in ag/ml 1.0 tnL 2.0 agml 3.0 ial. 5.0tal. Absorbance 0.32 0.56 0.79 133 1.50 1.77 electron mussing with two and it is w 24

Explanation / Answer

Answer: (2) We know that the meaning of 1:10 dilution is 1 part of the solution in 9 part of the solvent. In simple word, we have to mix 1 ml of given solution in 9 ml of solvent to make 10 ml which is 1:10 dilute solute.

In the question, we have to make 1000 ml of the 1:10 dilute solution of 4M NaCl.

So, we have to mix 100 ml of 4M NaCl in 900 ml of water which make total volume 1000 ml.

(3) If we want to make 2:50 dilution and make the volume of solution to be 200 ml. Then we have take

4 M NaCl solution = (2*200 ml)/50 = 8 mL

Water Volume to be added = 200 ml - 8 ml =192 mL

(4) Similarly, for making 10 mL solution with 2:50 dilution

4 M NaCl solution = (2*10 mL)/50 = 0.4 mL

Water added = 10 mL -0.4 mL = 9.6 mL

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