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Unformatted text preview: 4. How many moles of CaCl 2 are in 250 mL of a 3.0 M of CaCl 2 solution? M = moles/ L Convert 250 ml to 0.250 L and then plug into the equation to solve for moles, the big M is 3.0 Answer: 0.75 moles (1 pt) 5. What is the concentration, in m/v% of a solution prepared from 50. g NaCl and 2.5 L of water? (error, should read m/m%) 2.5 L of water which is 2500 ml of water which is 2500 g of water because D=M/V and D of water is 1.0 g/ml g of solute = 50. g of NaCl g of solution = (50. g of NaCl + 2500 g of water) [50.g/(2550g)] x 100 = 2.0 m/m% (1 pt) 6. What is a hypotonic solution? A prepared solution whose concentration is lower than what its supposed to be in order to match the osmotic pressure of the solution in our body....
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This test prep was uploaded on 04/10/2008 for the course CHEM 231 taught by Professor Hanover during the Spring '08 term at Lansing.
- Spring '08