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Chem Worksheet on Solution Concentration. Show work, units, and proper sig. figs. Block: _____ Name: ________________________________________ Teacher: _____________________________ 1. How many grams of thorium(IV) hexacyanoferrate(III) , and how many grams of water, are needed to prepare 600. g of a 2.5% solution? ______ g ________ g H2O. 2. 0.275 moles of "X" are dissolved in 10.75 moles of solvent. What is the mol % of X in the solution? What is the mole fraction of solvent in the solution? _________ mol % X ___________ mol fraction solvent 3. 0.375 moles of solute are dissolved in enough water to produce 1.750L of solution. What is the molarity, of the solution? __________ M 4. 69.91 g of KI are dissolved in 1996 cm3 of aqueous solution. What is the molarity? __________ M 5. How many liters of 0.500M KI can be made with 1.250 moles of KI? __________ L 6. What volume of 4.OOM HCI is needed to have 0.350 moles of HCI? __________ L 7. How many moles and how many grams of KI are in 0.250 L of 0.350M KI? __________ mol KI __________ g KI 8. How many grams of KI are needed to make 250. cm3 of 0.750M KI? __________ g KI 9. 42.8 cm3 of concentrated 11.7 M HCI are diluted with enough water to make 500. cm3 of solution. What is the molarity of that solution? (Hint: M= moles/liters) __________ M HCI. 10. Give complete calculations AND DIRECTIONS for preparing 1.00 L of 3.00 M H2S04, starting with water and concentrated 18.0 M H2SO4.