1a. Medical saline typically consists of 4.50 g of NaCl in 500.0 mL of solution. What is the molarity of this solution? What is the molality of this solution? (Use the density of water = 1 g/mL; for this question, since the concentration is dilute you may assume that the added NaCl does not result in a change in volume when it is added to water.) Do your answers make sense? Would either of these values potentially depend on temperature? 1b. Stomach acid is essentially a solution of hydrochloric acid (HCl). When first secreted, stomach acid has a concentration of roughly 0.160 M HCl. How many moles of HCl are present in 50.0 mL of stomach acid? 1c. If 5.0 mL of saline is introduced to 15 mL of stomach acid. What is the mole fraction of NaCl? What is the mole fraction of HCl? (In your calculations, use the molarities from parts (a) and (b) above).
1a. Medical saline typically consists of 4.50 g of NaCl in 500.0 mL of solution. What is the molarity of this solution? What is the molality of this solution? (Use the density of water = 1 g/mL; for this question, since the concentration is dilute you may assume that the added NaCl does not result in a change in volume when it is added to water.) Do your answers make sense? Would either of these values potentially depend on temperature?
1b. Stomach acid is essentially a solution of hydrochloric acid (HCl). When first secreted, stomach acid has a concentration of roughly 0.160 M HCl. How many moles of HCl are present in 50.0 mL of stomach acid?
1c. If 5.0 mL of saline is introduced to 15 mL of stomach acid. What is the mole fraction of NaCl? What is the mole fraction of HCl? (In your calculations, use the molarities from parts (a) and (b) above).
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