A water sample contaminated with chloride ion, how can you estimate the sample purity?
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A water sample contaminated with chloride ion, how can you estimate the sample purity?
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- How many mL of 13x stock solution would you need to make 387 mL of 1x PBS. Report your answer to 1 decimal place.How many mL of 10 x stock solution would you need to make 118 mL of 1x PBS? Report your answer to 1 decimal place.You need to make 20 mL of a 1/100 (10-2) dilution of a crystal violet solution? How much diluting fluid will be required? Note: Your answer should be in numerical format to the nearest 0.1 mL.
- To determine the cfu/ml of a pondwater sample, you perform 1/10, 1/100, 1/1000 and 1/10,000 serial dilutions and plate 0.1 mls of each dilution. You count 40 colonies on the plate derived from the 1/10,000 dilution. What is the cfu/ml of the pondwater? Show your work and use scientific notation.Given a BSA stock solution of 4mg/mL how would you prepare a 5 mL sample with a final concentration of 1 mg/mL?An aqueous solution is 3.50 % by mass hydrochloric acid, HCl, and has a density of 1.02 g/mL. The mole fraction of hydrochloric acid in the solution is ____.