Solution and Dilution Lab

Answer all the questions

Solutions and Dilutions Lab 1. What part of a solution is the solvent? Give an example of a common solvent in biology. 2. If you had a 0.5 M KCl solution, how much solute would you have in moles, and what would the solute be? Since KC has a molecular weight of 74.5, how many grams/L would this be? 3. Does a I M KCl solution have the same concentration as a 1 M NaCl solution? Explain your answer. 4. If you had a 0.1 M NaHCO, solution and you wanted a 0.01 M NaHCO3 solution, how could you dilute the first solution to get the second solution - describe the steps you would follow. What is the dilution factor? 5. If one has a 2 M NaCl solution and they make a 1:10 dilution of it, how many moles of NaCl are in the dilution? 6. What is the amount of solute in a 10:100 dilution of a 1 M KCl solution? 7. Calculate the IDFs and the TDF for the following serial dilution: 1.0 mL 10 mL 10 ml B Original 1 M NaCl + 99 mL H2O +990 mL H2O +990 mL H2O Express answers in scientific notation IDFA IDFB IDFC TDFA TDFB TDFC 10. Why do we do dilutions in a series - why not just make one dilution to the final concentration