Homework Answers
question 4
2g of KCl dissolved in 100ml of water (H2O).
In generally solution = Solute + solvent.
The substance or compound which is dissolved is called the solute.
The substance or compound in which the solute is dissolved is called the solvent.
KCl is dissolved, so KCl is Solute, and Water is the solvent.
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Question 4 (2 points) A mixture is prepared by dissolving 2 g of KCl in 100...
A solution was prepared by dissolving 39.0g of KCl in 225 g of water. 1. Calculate...
A solution was prepared by dissolving 39.0g of KCl in 225 g of water. 1. Calculate the mass percent of KCl in the solution. 2. Calculate the mole fraction of KCl in the solution. 3. Calculate the molarity of KCl in the solution if the total volume of the solution is 239 mL. 4. Calculate the molality of KCl in the solution.
A mixture is prepared by dissolving 1.70 g of ammonia gas and 5.35 g of ammonium...
A mixture is prepared by dissolving 1.70 g of ammonia gas and 5.35 g of ammonium chloride in distilled water and making up the volume to 100 mL. Kb= 1.75 x10-5 at the particular temperature for NH3(aq) The pH of the mixture would be: a) 2.38 b) 9.24 c) 4.76 d) 11.68 e) 10.45
a solution was prepared by dissolving 27.0 g KOH in 100 g water. A) what is...
a solution was prepared by dissolving 27.0 g KOH in
100 g water. A) what is mole fraction of KOH in solution? B) what
is mass percent?C) what is the molality?
2. A solution was prepared by dissolving 27.0 g KOH(s)in 100.0 g water. You may use the chart below if you find usefiul to answer questions a) -e) MW (g/mol Mass ()moles 56.1 H20 18.0 Solution (a) What is the mole fraction of KOH in the solution? (5 pts...
Potassium chloride has a solubility of 43 g of KCl in 100. g of H 2...
Potassium chloride has a solubility of 43 g of KCl in 100. g of H 2 O at 50 °C. Determine if each of the following forms an unsaturated or saturated solution at 50 °C: a. adding 25 g of KCl to 100. g of H 2 O b. adding 15 g of KCl to 25 g of H 2 O c. adding 86 g of KCl to 150. g of H 2 O
a. Consider these two solutions: Solution A is prepared by dissolving 5.00 g of MgCl2 in...
a. Consider these two solutions: Solution A is prepared by dissolving 5.00 g of MgCl2 in enough water to make .250 L of solutions, and Solution B is prepared by dissolving 5.00 g of KCl in enough water to make .250 L of solution. Which direction will solvent initally flow if these two solutions are seperated by a semipermeable membrane? b. Assuming that the volumes of the solutions described in question 4 are additive and igoring any effects that gravity...
Determine the molarity of a solution of potassium chloride that is prepared by dissolving 1.4753 g...
Determine the molarity of a solution of potassium chloride that is prepared by dissolving 1.4753 g of KCl in a 100-mL volumetric flask and filling it to the calibration mark with deionized water. Use a molar mass with at least 4 significant figures so that the number of SF in the calculated molarity is not limited. Show all calculations (including labeled conversion factors) and express the answer with the appropriate number of significant figures. According to the manufacturer, the volume...
Question 2 0/1 pts A solution was prepared by dissolving 8.03 g of (NH4)2SO4 (MW =...
Question 2 0/1 pts A solution was prepared by dissolving 8.03 g of (NH4)2SO4 (MW = 132.14 g/mol; specific volume = .565 ml/g) in 35.0 ml of water. The final volume of the solution is __ml. Question 3 0/2 pts A solution was prepared by dissolving 8.03 g of (NH4)2SO4 (MW = 132.14 g/mol; specific volume = .565 ml/g) in 35.0 ml of water. The concentration of (NH4)2SO4 in the solution is ___%(w/v).
4) A solution is prepared by dissolving 15.2 g of NaC,H,O, into water. The concentration of...
4) A solution is prepared by dissolving 15.2 g of NaC,H,O, into water. The concentration of the solution is measured at 1.95 M. Calculate the volume of the solution (in Liters): (5) (MM NaC,H,O,: 82.03 g/mol) 5) Common intravenous (IV) glucose solutions are prepared as 5.0 % mlv glucose. How many mililiters of solution are present in an IV bag that contains 39 grams of glucose? 6) Two solutions are prepared. The first contains glucose (C.H.O.) dissolved in water at...
A solution at 30 ° C is prepared by dissolving 3 g of urea in 100...
A solution at 30 ° C is prepared by dissolving 3 g of urea in 100 ml of water. Under these conditions, calculate for the solution: a) the boiling point b) the freezing point c) the vapor pressure d) the osmotic pressure e) the ebulloscopic and cryoscopic constant (from the solvent data).
#3 & #4 explanation please 3. A A buffer is prepared by dissolving 3.58 g of...
#3 & #4 explanation please
3. A A buffer is prepared by dissolving 3.58 g of formic acid (HCO,H) and 5.95 g0 enough water to make 250 ml, of solution f potassium formate (KC ???,H) ?n . What is the plf Formic acid has a pk, of 3.80 4. An electrochemical cell has a standard-state cell potential E 0.125 V. If the electron stoichiometry n 2, what are AG' and K at a temperature of 298 K?
a solution was prepared by dissolving 27.0 g KOH in
100 g water. A) what is mole fraction of KOH in solution? B) what
is mass percent?C) what is the molality?
2. A solution was prepared by dissolving 27.0 g KOH(s)in 100.0 g water. You may use the chart below if you find usefiul to answer questions a) -e) MW (g/mol Mass ()moles 56.1 H20 18.0 Solution (a) What is the mole fraction of KOH in the solution? (5 pts...
Question 2 0/1 pts A solution was prepared by dissolving 8.03 g of (NH4)2SO4 (MW = 132.14 g/mol; specific volume = .565 ml/g) in 35.0 ml of water. The final volume of the solution is __ml. Question 3 0/2 pts A solution was prepared by dissolving 8.03 g of (NH4)2SO4 (MW = 132.14 g/mol; specific volume = .565 ml/g) in 35.0 ml of water. The concentration of (NH4)2SO4 in the solution is ___%(w/v).
4) A solution is prepared by dissolving 15.2 g of NaC,H,O, into water. The concentration of the solution is measured at 1.95 M. Calculate the volume of the solution (in Liters): (5) (MM NaC,H,O,: 82.03 g/mol) 5) Common intravenous (IV) glucose solutions are prepared as 5.0 % mlv glucose. How many mililiters of solution are present in an IV bag that contains 39 grams of glucose? 6) Two solutions are prepared. The first contains glucose (C.H.O.) dissolved in water at...
#3 & #4 explanation please
3. A A buffer is prepared by dissolving 3.58 g of formic acid (HCO,H) and 5.95 g0 enough water to make 250 ml, of solution f potassium formate (KC ???,H) ?n . What is the plf Formic acid has a pk, of 3.80 4. An electrochemical cell has a standard-state cell potential E 0.125 V. If the electron stoichiometry n 2, what are AG' and K at a temperature of 298 K?
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