Homework Answers
Rf values is a measurement of the movement of the compounds on the stationary phase with respect to the solvent front. compounds that have to be checked will be bonded with the stationary phase/ paper by means of some kind of interactions and the eluent which is used for the movement of the component of the compounds will try to help the tested compounds fo overcoming from these interactions. It can understand that the higher the interactions between the compound and stationary phase lower will be the Rf and vice versa. therefore,
The dye material which is having the lower rf value will have a higher interaction with the stationary phase in comparison with the solvent front.
If the Rf value is high it means the compound having weak interactions with the stationary phase in comparison with the solvent.
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The Rf value in this experiment is a function of the intermolecular forces present between the...
Define intermolecular forces and explain the type of intermolecular forces present between alcohols, phenol and thiol...
Define intermolecular forces and explain the type of intermolecular forces present between alcohols, phenol and thiol molecules. Citing would be very helpful.
INTERMOLECULAR FORCES INTRODUCTION LEARNING OBJECTIVES To relate the effecet of intermolecular fo...
INTERMOLECULAR FORCES INTRODUCTION LEARNING OBJECTIVES To relate the effecet of intermolecular forces on relative melting points and vapour pressures of some organic substances THEORY Weak attractive forces that occur between individual molecules in substances are called intermolecular forces. These include London dispersion forces, dipole-dipole forces and hydrogen-bonding forces. Collectively, the three types of intermolecular forces are referred to as Van der Waals forces. These attractive forces are much weaker than the chemical bonds between atoms in a molecule. Note that...
Order the three types of intermolecular forces: dipole-dipole, London force, hydrogen bonds in terms of strength...
Order the three types of intermolecular forces: dipole-dipole, London force, hydrogen bonds in terms of strength from weakest to strongest. Give a brief description of each of the different intermolecular forces. Question 24 (6 points) The boiling points for H2O (BP = 100°C) and HS (BP-60°C) are drastically different despite oxygen and sulfur being next to each other on the periodic table. Explain these differences in boiling points utilizing your labels of intermolecular forces and the relative strength of the...
2. Identify the strongest type of intermolecular forces in acetone, ethanol, water and hexane. (Structures listed...
2. Identify the strongest type of intermolecular forces in acetone, ethanol, water and hexane. (Structures listed on page 15.) Experiment 2 Intermolecular Forces There are three general types of intermolecular forces. All substances exhibit London Dispersion Forces (LDF), and they are generally the weakest of the three types. These London forces are due to the attractions between small, temporary dipoles that arise from the constant, random movement of the electrons in a substance. As molar mass increases, the size of...
NH3, has the same molecular shape as PCl3. Which intermolecular forces are present between NH3 molecules?...
NH3, has the same molecular shape as PCl3. Which intermolecular forces are present between NH3 molecules? How are they different than the forces between PCl3 molecules?
show me the work in a clear hand writing so i can understand please Intermolecular Forces...
show me the work in a clear hand writing so i can understand
please
Intermolecular Forces and Boiling Point (3 pts) Formaldehyde (CH2O) appeared in your exam. (a) Use Lewis structures to show a molecule of formaldehyde forming hydrogen bonding attractions with a molecule of water. CLEARLY identify the donor and acceptor in this drawing. (b) Referring to your drawing above, briefly explain why two formaldehyde molecules can't form hydrogen bonding attractions between each other. (c) Formaldehyde molecules are twice...
Consider the molecule below: o=s=o: Select ALL the intermolecular forces that are expected to be present...
Consider the molecule below: o=s=o: Select ALL the intermolecular forces that are expected to be present between two of these molecules. Select as many answers as are applicable, however points will be deducted for incorrect guesses. Select one or more: Dispersion forces Dipole/dipole forces Hydrogen bonding Check What amount of thermal energy (in kJ) is required to convert 136 g of ice at -16 °C completely to water vapour at 217 °C? The melting point of water is 0°C and...
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent...
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent ion= 2.05Smin low Peak 1 Compound Name: athanol Rapesnal utanal aclapeatanal 4.755min oilng 6.895min .230 min Peak 2 Compound Name: Peak 3 Compound Name: Peak 4 Compound Name: GC#:1 Ketone Standard Mixture Retention time 2.575un Peak 1 Compound Name: Acclono Butanon a Pentanone 2tHex anon Peak 2 Compound Name: min Peak 3 Compound Name: 615 min 1D. 307 min Peak 4 Compound Name: Part...
help! Post-Lab Questions 1. Does a large value for Rf mean that the solute has a...
help!
Post-Lab Questions 1. Does a large value for Rf mean that the solute has a relatively strong affinity for the solvent (mobile phase) or a relatively weak affinity for the solvent? 2. Briefly describe what experimental conditions gave you the best separation. 3. The structure of indigo is shown in the discussion section. This type of structure is common for organic molecules and not all atoms, lone pairs and bonds are shown. Use your textbook as mentioned earlier in...
Experiment #5-Acidity and Electrostatic Potential Experiment #5: Correlation of Acidity with Elec...
please show all work thank you im advance
Experiment #5-Acidity and Electrostatic Potential Experiment #5: Correlation of Acidity with Electrostatic Potential This Experiment is Done in Groups of 2 Background: his laboratory experiment is focused on theoretically predicting the acidity of several molecules. A software package called "Spartan" was used to predict the structure electrostatic potential of each molecule. The electrostatic potential at a point P is defined as the Coulomb energy of interaction between the electron-charge cloud of the...
INTERMOLECULAR FORCES INTRODUCTION LEARNING OBJECTIVES To relate the effecet of intermolecular forces on relative melting points and vapour pressures of some organic substances THEORY Weak attractive forces that occur between individual molecules in substances are called intermolecular forces. These include London dispersion forces, dipole-dipole forces and hydrogen-bonding forces. Collectively, the three types of intermolecular forces are referred to as Van der Waals forces. These attractive forces are much weaker than the chemical bonds between atoms in a molecule. Note that...
Order the three types of intermolecular forces: dipole-dipole, London force, hydrogen bonds in terms of strength from weakest to strongest. Give a brief description of each of the different intermolecular forces. Question 24 (6 points) The boiling points for H2O (BP = 100°C) and HS (BP-60°C) are drastically different despite oxygen and sulfur being next to each other on the periodic table. Explain these differences in boiling points utilizing your labels of intermolecular forces and the relative strength of the...
2. Identify the strongest type of intermolecular forces in acetone, ethanol, water and hexane. (Structures listed on page 15.) Experiment 2 Intermolecular Forces There are three general types of intermolecular forces. All substances exhibit London Dispersion Forces (LDF), and they are generally the weakest of the three types. These London forces are due to the attractions between small, temporary dipoles that arise from the constant, random movement of the electrons in a substance. As molar mass increases, the size of...
show me the work in a clear hand writing so i can understand
please
Intermolecular Forces and Boiling Point (3 pts) Formaldehyde (CH2O) appeared in your exam. (a) Use Lewis structures to show a molecule of formaldehyde forming hydrogen bonding attractions with a molecule of water. CLEARLY identify the donor and acceptor in this drawing. (b) Referring to your drawing above, briefly explain why two formaldehyde molecules can't form hydrogen bonding attractions between each other. (c) Formaldehyde molecules are twice...
Consider the molecule below: o=s=o: Select ALL the intermolecular forces that are expected to be present between two of these molecules. Select as many answers as are applicable, however points will be deducted for incorrect guesses. Select one or more: Dispersion forces Dipole/dipole forces Hydrogen bonding Check What amount of thermal energy (in kJ) is required to convert 136 g of ice at -16 °C completely to water vapour at 217 °C? The melting point of water is 0°C and...
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent ion= 2.05Smin low Peak 1 Compound Name: athanol Rapesnal utanal aclapeatanal 4.755min oilng 6.895min .230 min Peak 2 Compound Name: Peak 3 Compound Name: Peak 4 Compound Name: GC#:1 Ketone Standard Mixture Retention time 2.575un Peak 1 Compound Name: Acclono Butanon a Pentanone 2tHex anon Peak 2 Compound Name: min Peak 3 Compound Name: 615 min 1D. 307 min Peak 4 Compound Name: Part...
help!
Post-Lab Questions 1. Does a large value for Rf mean that the solute has a relatively strong affinity for the solvent (mobile phase) or a relatively weak affinity for the solvent? 2. Briefly describe what experimental conditions gave you the best separation. 3. The structure of indigo is shown in the discussion section. This type of structure is common for organic molecules and not all atoms, lone pairs and bonds are shown. Use your textbook as mentioned earlier in...
please show all work thank you im advance
Experiment #5-Acidity and Electrostatic Potential Experiment #5: Correlation of Acidity with Electrostatic Potential This Experiment is Done in Groups of 2 Background: his laboratory experiment is focused on theoretically predicting the acidity of several molecules. A software package called "Spartan" was used to predict the structure electrostatic potential of each molecule. The electrostatic potential at a point P is defined as the Coulomb energy of interaction between the electron-charge cloud of the...
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