Concept explainers
(a)
Interpretation:
A formula for the density of the block should be derived.
Concept introduction:
It is given that a rectangular block floats at the interface between two immiscible liquids. The dimensions of the block are given as follows,
Height of the block =
Cross sectional area of the block =
Density of the light liquid =
Density of the heavy liquid =
Height from top surface of light liquid to the top surface of the block =
Height from the top of the block to the liquids interface =
Height from liquid interface to the bottom of block =
Archimedes' principle,
According to Archimedes principle the upward buoyant force that is exerted on a body immersed in a fluid, is equal to the weight of the fluid that the body displaces.
(b)
Interpretation:
Prove that the two approaches used to balance force on the block are correct.
Concept introduction:
It is given that a rectangular block floats at the interface between two immiscible liquids. The dimensions of the block are given as follows,
Height of the block =
Cross sectional area of the block =
Density of the light liquid =
Density of the heavy liquid =
Height from top surface of light liquid to the top surface of the block =
Height from the top of the block to the liquids interface =
Height from liquid interface to the bottom of block =
Archimedes' principle,
According to Archimedes principle the upward buoyant force that is exerted on a body immersed in a fluid, is equal to the weight of the fluid that the body displaces.
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Chapter 3 Solutions
EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
- In the determination of molar mass of an unknown substance by ebullioscopic constant, 30 mL of acetone (C3H6O) was placed in a test tube with thermometer and glass tubing and subjected to water bath. Upon boiling, the temperature reads 56 degC. For the boiling point of unknown-acetone solution, you prepared the solution by mixing 1.60 g of unknown solute in the 30 mL acetone and subjected it again to water bath. The boiling temperature of the solution is 56.68 degC. The density of acetone = 0.9849 g/mL and the Kb of acetone = 1.67 degC/kg. How many moles of solute is present in the solution? Molality of the solution?arrow_forwardIn the determination of molar mass of an unknown substance by ebullioscopic constant, 30 mL of acetone (C3H6O) was placed in a test tube with thermometer and glass tubing and subjected to water bath. Upon boiling, the temperature reads 56 degC. For the boiling point of unknown-acetone solution, you prepared the solution by mixing 1.60 g of unknown solute in the 30 mL acetone and subjected it again to water bath. The boiling temperature of the solution is 56.68 degC. The density of acetone = 0.9849 g/mL and the Kb of acetone = 1.67 degC/kg. How many moles of solute is present in the solution given?arrow_forwardIn the determination of molar mass of an unknown substance by ebullioscopic constant, 30 mL of acetone (C3H6O) was placed in a test tube with thermometer and glass tubing and subjected to water bath. Upon boiling, the temperature reads 56 degC. For the boiling point of unknown-acetone solution, you prepared the solution by mixing 1.60 g of unknown solute in the 30 mL acetone and subjected it again to water bath. The boiling temperature of the solution is 56.68 degC. The density of acetone = 0.9849 g/mL and the Kb of acetone = 1.67 degC/kg. 1. How many moles of solute is present in the solution 2. What is the value for delta Tb or the change in boiling temperature (in degrees Celsius)? 3. What is the molal concentration of the solution?arrow_forward
- In the determination of molar mass of an unknown substance by ebullioscopic constant, 30 mL of acetone (C3H6O) was placed in a test tube with thermometer and glass tubing and subjected to water bath. Upon boiling, the temperature reads 56 degC. For the boiling point of unknown- acetone solution, you prepared the solution by mixing 1.60 g of unknown solute in the 30 ml acetone and subjected it again to water bath. The boiling temperature of the solution is 56.68 degC. The density of acetone = 0.9849 g/mL and the Kb of acetone = 1.67 degC/kg. How many moles of solute is present in the solution given in the video? Final answer must be rounded off to 2 decimal places, and shall NOT have any units.arrow_forwardIn the determination of molar mass of an unknown substance by ebullioscopic constant, 30 mL of acetone (C3H6O) was placed in a test tube with thermometer and glass tubing and subjected to water bath. Upon boiling, the temperature reads 56 degC. For the boiling point of unknown-acetone solution, you prepared the solution by mixing 1.60 g of unknown solute in the 30 mL acetone and subjected it again to water bath. The boiling temperature of the solution is 56.68 degC. The density of acetone = 0.9849 g/mL and the Kb of acetone = 1.67 degC/kgarrow_forwardIn the determination of molar mass of an unknown substance by ebullioscopic constant, 30 mL of acetone (C3H6O) was placed in a test tube with thermometer and glass tubing and subjected to water bath. Upon boiling, the temperature reads 56 degC. For the boiling point of unknown-acetone solution, you prepared the solution by mixing 1.60 g of unknown solute in the 30 mL acetone and subjected it again to water bath. The boiling temperature of the solution is 56.68 degC. The density of acetone = 0.9849 g/mL and the Kb of acetone = 1.67 degC/kg Questions: 1. What is the molal concentration of the solution? 2. What is the value for delta Tb or the change in boiling temperature (in degrees Celsius)? 3. How many moles of solute are present in the solution?arrow_forward
- P5B.7 The molar mass of a protein was determined by dissolving it in water, and measuring the height, h, of the resulting solution drawn up a capillary tube at 20°C. The following data were obtained. c/(mg cm) 3.221 4.618 5.112 6.722 h/cm 5.746 8.238 9.119 11.990arrow_forwardQ1. A suspension of colloidal particles in water (temperature 25°C and viscosity 8.9x104 Ns m2) shows a particle concentration of 10¹1 per cm³. Calculate the half time to diffusion controlled coagulation.arrow_forwardIn the determination of molar mass of an unknown substance by ebullioscopic constant, 30 ml of acetone (C3H6O) was placed in a test tube with thermometer and glass tubing and subjected to water bath. Upon boiling, the temperature reads 56 deg C. For the boiling point of unknown-acetone solution, you prepared the solution by mixing 1.60 g of unknown solute in the 30 mL acetone and subjected it again to water bath. The boiling temperature of the solution is 56.68 deg C. The density of acetone = 0.9849 g/mL and the Kb of acetone = 1.67 degC/kg 1. What is the value for delta Tb or the change in boiling temperature (in degrees Celsius)? 2. How many moles of solute is present in the solution given in the situation?arrow_forward
- In the determination of molar mass of an unknown substance by ebullioscopic constant, 30 mL of acetone (C3H6O) was placed in a test tube with thermometer and glass tubing and subjected to water bath. Upon boiling, the temperature reads 56 deg C. For the boiling point of unknown-acetone solution, you prepared the solution by mixing 1.60 g of unknown solute in the 30 mL acetone and subjected it again to water bath. The boiling temperature of the solution is 56.68 deg C. The density of acetone = 0.9849 g/mL and the Kb of acetone = 1.67 degC/kg What is the value for delta Tb or the change in boiling temperature (in degrees Celsius)? Final answer must be rounded off to 2 decimal places, and shall NOT have any unit.arrow_forwardIn the determination of molar mass of an unknown substance by ebullioscopic constant, 30 mL of acetone (C3H6O) was placed in a test tube with thermometer and glass tubing and subjected to water bath. Upon boiling, the temperature reads 56 deg C. For the boiling point of unknown-acetone solution, you prepared the solution by mixing 1.60 g of unknown solute in the 30 mL acetone and subjected it again to water bath. The boiling temperature of the solution is 56.68 deg C. The density of acetone = 0.9849 g/mL and the Kb of acetone = 1.67 degC/kg - What is the value for delta Tb or the change in boiling temperature (in degrees Celsius)? Final answer must be rounded off to 2 decimal places, and shall NOT have any unit. - How many moles of solute is present in the solution given in the video? Final answer must be rounded off to 2 decimal places, and shall NOT have any units. - What is the molal concentration of the solution? Final answer must be rounded off to 2 decimal places, and shall NOT…arrow_forwardIn the determination of molar mass of an unknown substance by ebullioscopic constant, 30 mL of acetone (C3H6O) was placed in a test tube with thermometer and glass tubing and subjected to water bath. Upon boiling, the temperature reads 56 deg C. For the boiling point of unknown-acetone solution, you prepared the solution by mixing 1.60 g of unknown solute in the 30 mL acetone and subjected it again to water bath. The boiling temperature of the solution is 56.68 deg C. The density of acetone = 0.9849 g/mL and the Kb of acetone = 1.67 degC/kg What is the value for delta Tb or the change in boiling temperature (in degrees Celsius)?arrow_forward
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