1) How can the following solutions be prepared? COMPUTE and Do not forget to include a short instruction in the preparation. a. 100 mL of 40% (w/v) polyethylene glycol (PEG) b. 47 mL of 7% (w/v) solution of sodium chloride (NaCl) c. 200 mL of 95% (v/v) solution of ethanol
1) How can the following solutions be prepared?
COMPUTE and Do not forget to include a short instruction in the preparation.
a. 100 mL of 40% (w/v) polyethylene glycol (PEG)
b. 47 mL of 7% (w/v) solution of sodium chloride (NaCl)
c. 200 mL of 95% (v/v) solution of ethanol
2) If 25g of NaCl is dissolved into a final volume of 500mL, what is the percent (w/v) concentration of NaCl in the solution?
3) How will you prepare 200mL of 0.3M NaCl prepared? COMPUTE and Include a short instruction in the preparation.
4) From a stock solution of 1M Tris solution, how will you prepare 400mL of 0.2M? COMPUTE and Do not forget to include a short instruction in the preparation.
5) How is 4mL of 50mM NaCl solution be prepared from a 2M NaCl stock? COMPUTE and Do not forget to include a short instruction in the preparation.
6) What is the molar concentration of a 10% NaCl solution? (At 25⁰C, the density of 10% NaCl is 1.09 g/ml )
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