A 7% solution of sodium chloride (Na Cl - MW = 58.44 g/mol) has been prepared...
A 7% solution of sodium chloride (Na Cl - MW = 58.44 g/mol) has been prepared by a technician for direct intravenous injection to a patient. While reviewing the order and preparation, you recall that this concentration seems to be abnormal. As a result, you want to determine the osmolarity of the solution. What is the osmolarity of this solution?
Note: Please provide your answer in units of mOsmol/L.
Homework Answers
osmolarity is the concentration of ions in the solution. an osmole is a mole of particles that contribute to the osmotic pressure of a solution.
nacl dissociate completely in water to form Na+ and Cl - ions. thus each mole of nacl becomes 2 osmoles in sol. one mole of Na+ and one mole of Cl - . a sol of 1mol/L nacl has an osmolarity of 2osmol
eg: calculate the osmolarity of 0.140mol/L Nacl
Nacl = 0.140mol/L
each mole of Nacl becomes 2 osmoles
therefore osmolarity = 0.140mol/L x ( 2osmol / 1 mol)
= 0.280osmol/L
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A 71 kg patient is in need of intravenous iron supplementation. He was ordered to receive a single intravenous 6 mg/kg dose of iron (III) sulfate (ferric sulfate - Fe2(SO4)3 - MW=399.88 g/mol). Iron (III) sulfate was prepared as a stabilized aqueous solution for this patient by dissolving 800 mg of stabilized iron sulfate salt in water to produce 20 mL of solution. How many milliequivalents of iron (Fe 3+) will the patient receive as...
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