DATA TO BE USED Please use the data provided below to complete this assignment. Refer to Expt. 7 in the laboratory manual for an explanation of the data. o Mass used to prepare 5.0 g/L sodium sulfate solution: 0.494 g o Mass used to prepare 0.025 M sodium sulfate solution: 0.351 g o Mass used to prepare 2.0 mM sodium sulfate solution: 0.025 g o Conductivity (in uS/cm) for 5.0 g/L and 0.025 M and 2.0 mM sodium sulfate solutions were 7728, 5545, and 432 respectively.

ADDITIONAL PROBLEMS – Show all work and report the answer to the correct number of significant figures. This portion may be neatly hand-written. 1. Suppose that you prepare 250 mL of a 3.00 M solution of KF. 1. Calculate how many moles of KF are required. 2. Calculate how many grams of KF are required. 2. Suppose that you prepare 25.00 mL of a 0.03750 M potassium sulfate solution. 1. Calculate the number of moles of potassium sulfate that are in the solution. 2. Calculate the number of potassium ions that are in the solution. 3. Suppose that you are preparing CaCl solutions. 1. What mass of CaCl26) would you need to add to make 100.0 mL of a 0.020 M solution? 2. If you actually added 0.228 g of CaCl2 (s), what would the solution concentration be? 4. What is the concentration of FeCl3 in a solution prepared by dissolving 1.200 g of FeCl3 in enough water to make 275 mL of solution? 1. Calculate the concentration in molarity 2. Calculate the concentration in mg/L 5. Calculate the volume in milliliters of a solution required to obtain the following: 1. 1.14 g of sodium chloride from a 0.0270 M solution 2. 3.30 g of ethanol(C2H5OH) from a 1.50 M solution