The column efficiency is constant for a column that uses a cons tant eluent composition. What does this say about the peak width of slowly eluting compounds relative to those of rapidly eluting compounds?
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- The unknown metal sulfates are hygroscopic and will absorb water from air. The unknowns must thus be kept in desiccators to remove any absorbed water. Howwould your results be affected if your unknown sample was not desiccated? Would this error cause your calculation of the mass percent of sulfate in the unknown to be too high or too low? Explain.If 10g of salt was mixed in 1L water. What percent solution will this be.How many grams of copper sulfate would you need to make 5 L of a 7 M copper sulfate solution?
- Calculate the percent by mass of a solution that is prepared by dissolving 385 grams ofpotassium iodide in 755 grams of water.Assume that you have a stock solution of 10% SDS and you need to make 150 microliters of 0.5% SDS. What volume of 10% SDS and what volume of water would you use?Your supervisor asks to make 350 mL of a 0.75% (w/v) starch solution using a 5% (w/v) stock solution. You have calcuated how much stock solution you need. But, how much water (in mL) will you need to add to the stock to achieve the correct final concentration?
- Explain the difference in the melting points of the linoleic acid and linolenic acid:give the respective the TOTAL DILUTION FACTOR of respective serial dilutions. show complete solution.Calculate the molarity of dilute Ca(OH)2 solution if the titration of 30.00 mL of 0.05231 M HCl required 24.76 mL of the acid. An 0.2500 g hydroxide tablet sample submitted in the lab used 36.75 mL during titration. How much is the hydroxide in mg present?
- How many mL of 13x stock solution would you need to make 387 mL of 1x PBS. Report your answer to 1 decimal place.Describe the preparation of the following solutions include all mathematic calculations and equipment of the laboratory needed A.500 mm of a solution of KNO 1.50 M B. 150 g of a solution 5.0% of NaC2H3O2 C. 500 mm of a solution of NaOH 0.50 M from a solution of NaOH 6.0 MYou have a 62% dextrose solution. How many mL will give you 35 g of dextrose?