(1) 0450 moles of NaCI (solid; MW-58.44) are dissolved in 95.0 ml of water. Calc
ID: 203956 • Letter: #
Question
(1) 0450 moles of NaCI (solid; MW-58.44) are dissolved in 95.0 ml of water. Calculate the molarity of the Naci solution You need to 2.5L of 60% EtOH but all you have available is 90% EOH and 100L of DI water. How much of each compound should you use to make your desired solution. (2) (3) You have a bottle of NaOH (solid; MW-40) and need to make 150 ml of 0.25M NaoH solution. H NaOH should you use? Using the materials below, calculate and write instructions on how to make a 100 ml solution containing chloroform, 18% dimethyle ether will be your solvent. (4) 2.5M ne chloride, and 10 mM cytoplasmic stain. Since this is a non-polar solution, assume A bottle of 4M chloroform (liquid) A bottle of 90% dimethylene chloride (liquid) A container of 10 ml of 1M cytoplasmic stain (liquid) Unlimited supply of ether -
Explanation / Answer
1) Molarity = no. of moles / volume of solution
No of moles of NaCl = 0.450
Volume = 95 ml = 0.095 L.
Molarity = 0.450 / 0.095
= 4.73 M.
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