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What is the minimum pressure in kPa that must be applied at 25 degree C to...
What is the minimum pressure in kPa that must be applied at 25 °C to obtain...
What is the minimum pressure in kPa that must be applied at 25 °C to obtain pure water by reverse osmosis from water that is 0.204 M in sodium chloride and 0.022 M in zinc sulfate? Assume complete dissociation for electrolytes.
A reverse osmosis unit is used to obtain drinkable water from a source that contains 0.750...
A reverse osmosis unit is used to obtain drinkable water from a source that contains 0.750 g NaCI per liter. What is the minimum pressure (in torr) that must be applied across the semipermeable membrane to obtain water? Assume room temperature or about 298 K. (Don't forget the van't Hoff factor!)
The vapor pressure of water at 25 degree C is o.0313 atm. Calculate the values of...
The vapor pressure of water at 25 degree C is o.0313 atm. Calculate the values of K_p and K_c at 25 degree C for the equilibrium: H_2O (l) H_2O(g). Vinegar contains acetic acid, a weak acid that is partially dissociated in aqueous solution: CH_3COOH(aq) H^+(aq) + CH_3CO^-_2 (aq) a) Write the equilibrium constant expression for K_c. b) What is the value of K_c if the extent of dissociation of 1.0 M CH_3COOH is 0.42%? Determination of an Equilibrium Constant
Find the equilibrium concentration of aluminum ions in pure water at 25 degree C caused by...
Find the equilibrium concentration of aluminum ions in pure water at 25 degree C caused by the dissociation of Al(OH)_3. Express the answer both in units of M and mg/L. Find the equilibrium pH value if copper ion (Cu^2+) concentration in water is 1.2 mg/L. The copper ion is dissolved from Cu(OH)_2. Calculate the equilibrium concentration of dissolved oxygen in mg/L in 10 degree C water (a) at msl (mean sea level), and (b) at 600 m elevation.
A solution contains dissolved sugars at a total concentration of 0.28molL at 25∘C. What pressure (torr)...
A solution contains dissolved sugars at a total concentration of 0.28molL at 25∘C. What pressure (torr) must be applied to prevent osmotic flow of pure water into the solution through a membrane permeable only to water molecules?
Problem 5.76. Seawater has a salinity of 3.5%, meaning that if you boil away a kilogram...
Problem 5.76. Seawater has a salinity of 3.5%, meaning that if you boil away a kilogram of seawater, when you're finished you'll have 35 g of solids (mostly NaCl) left in the pot. When dissolved, sodium chloride dissociates into separate Na+ and clº ions. (a) Calculate the osmotic pressure difference between seawater and fresh water. Assume for simplicity that all the dissolved salts in seawater are NaCl. (b) If you apply a pressure difference greater than the osmotic pressure to...
A saline solution contains 7.6 g of NaCl in 1.00 kg of water. Assuming an ideal...
A saline solution contains 7.6 g of NaCl in 1.00 kg of water. Assuming an ideal value for the Van't Hoff factor, i, calculate the freezing point of this solution in °C out of Answer 18 A saline solution contains 79 g of NaCi per 0.60 iter of solution. Assuming an ideal value for the van't Hoff factor, calculate the osmotic pressure (in atm) of this solution at 288 K out of Answer 19 A reverse osmosis unit is used...
1) At physiological temperature (37OC) the osmotic pressure of blood is 7.65 atm. What concentration (%...
1) At physiological temperature (37OC) the osmotic pressure of blood is 7.65 atm. What concentration (% W/V) of potassium chloride (KCl, MW = 74.5) solution has the same osmotic pressure of blood? Assume the specific gravity of the solution is 1. 2)An ophthalmic (eye drop) formulation contains 100 mEq of sodium chloride (molecular weight = 58.5 g/mole). Calculate the amount (in grams) of sodium chloride needed for the formulation. 3)Methanol (CH3OH, MW = 32) is a nonelectrolyte. What is the...
calculate the vapour pressure of this solution at 29.8 degree celsius/ you may assume that the...
calculate the vapour pressure
of this solution at 29.8 degree celsius/ you may assume that the
solution is so dilute that its density is 1.00 gm cm^-3 Pa
M Correct! A protein has a molar mass of 169000 g mol-1. An aqueous solution of this protein has an osmotic pressure of 0.294 kPa at 29.8 °C. Calculate the concentration of the protein (in g L1) in this solution. 19.72 g L. the tolerance is +/-2% SHOW ANSWER SHOW HINT LINK...
Ethanol has a vapor pressure of 58.3 torr at 25 degree C. Determine the delta H...
Ethanol has a vapor pressure of 58.3 torr at 25 degree C. Determine the delta H (we assume that delta H in independent of temperature). l_n (p_2/58, 3) = delta / (1/351, 4 - 1/298) A 0.250 g chunk of sodium metal is cautiously dropped into a mixture of 50.0 g of water wend 50.0 g of ice at 0 degree C. The reaction is: 2Na(s) 2H2O) + 2H_2O(l) rightarrow 2NaOH(aq) +H_2(g); delta H = -368 kJ. Will all the...
A reverse osmosis unit is used to obtain drinkable water from a source that contains 0.750 g NaCI per liter. What is the minimum pressure (in torr) that must be applied across the semipermeable membrane to obtain water? Assume room temperature or about 298 K. (Don't forget the van't Hoff factor!)
The vapor pressure of water at 25 degree C is o.0313 atm. Calculate the values of K_p and K_c at 25 degree C for the equilibrium: H_2O (l) H_2O(g). Vinegar contains acetic acid, a weak acid that is partially dissociated in aqueous solution: CH_3COOH(aq) H^+(aq) + CH_3CO^-_2 (aq) a) Write the equilibrium constant expression for K_c. b) What is the value of K_c if the extent of dissociation of 1.0 M CH_3COOH is 0.42%? Determination of an Equilibrium Constant
Find the equilibrium concentration of aluminum ions in pure water at 25 degree C caused by the dissociation of Al(OH)_3. Express the answer both in units of M and mg/L. Find the equilibrium pH value if copper ion (Cu^2+) concentration in water is 1.2 mg/L. The copper ion is dissolved from Cu(OH)_2. Calculate the equilibrium concentration of dissolved oxygen in mg/L in 10 degree C water (a) at msl (mean sea level), and (b) at 600 m elevation.
Problem 5.76. Seawater has a salinity of 3.5%, meaning that if you boil away a kilogram of seawater, when you're finished you'll have 35 g of solids (mostly NaCl) left in the pot. When dissolved, sodium chloride dissociates into separate Na+ and clº ions. (a) Calculate the osmotic pressure difference between seawater and fresh water. Assume for simplicity that all the dissolved salts in seawater are NaCl. (b) If you apply a pressure difference greater than the osmotic pressure to...
A saline solution contains 7.6 g of NaCl in 1.00 kg of water. Assuming an ideal value for the Van't Hoff factor, i, calculate the freezing point of this solution in °C out of Answer 18 A saline solution contains 79 g of NaCi per 0.60 iter of solution. Assuming an ideal value for the van't Hoff factor, calculate the osmotic pressure (in atm) of this solution at 288 K out of Answer 19 A reverse osmosis unit is used...
calculate the vapour pressure
of this solution at 29.8 degree celsius/ you may assume that the
solution is so dilute that its density is 1.00 gm cm^-3 Pa
M Correct! A protein has a molar mass of 169000 g mol-1. An aqueous solution of this protein has an osmotic pressure of 0.294 kPa at 29.8 °C. Calculate the concentration of the protein (in g L1) in this solution. 19.72 g L. the tolerance is +/-2% SHOW ANSWER SHOW HINT LINK...
Ethanol has a vapor pressure of 58.3 torr at 25 degree C. Determine the delta H (we assume that delta H in independent of temperature). l_n (p_2/58, 3) = delta / (1/351, 4 - 1/298) A 0.250 g chunk of sodium metal is cautiously dropped into a mixture of 50.0 g of water wend 50.0 g of ice at 0 degree C. The reaction is: 2Na(s) 2H2O) + 2H_2O(l) rightarrow 2NaOH(aq) +H_2(g); delta H = -368 kJ. Will all the...
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