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In the process of dissolving lonic compounds, the cations and anions are separated from the crystal...
When an ionic compound dissolves in water, the cations and anions are separated. Ions in solution...
When an ionic compound dissolves in water, the cations and anions are separated. Ions in solution will result in that solution conducting electricity, an electrolyte. Some solutions are strong electrolytes while others are weak electrolytes. 1. What do you think is giving rise to electrical conductivity? ions in a crystal 2. This is a diagram showing ions in a crystal. Draw a diagram showing the particles in 1) strong electrolyte, and 2) weak electrolyte. Pay attention to how the water...
Essex County College Division of Biology and Chemistry General Chemistry II Problem Set I CHM 10 1. Which of the following mixtures have components which can be separated by filtration? A) colloi...
Essex County College Division of Biology and Chemistry General Chemistry II Problem Set I CHM 10 1. Which of the following mixtures have components which can be separated by filtration? A) colloids B) solutions D) all of these 2. In most liquid solutions, the component present in the larger amount is called the A) dispersed medium B) emulsifying agent C) solute D) solvent 3. lodine, 12(s), is more soluble in dichloromethane, CHCI than in water because A) both iodine and...
Post-lab question Part A 1. Metallic sodium forms a body centered cubic crystal. Why would the...
Post-lab question Part A 1. Metallic sodium forms a body centered cubic crystal. Why would the water displacement method used in part A not be suitable to determine the density of sodium? (Hint: watch the following video to help you answer this question: https://www.youtube.com/watch?v=18tOtZKpi04) 2. Calculate the density of sodium. (The radius of a sodium atom is 186pm) Post-lab Question Part B: Consider cubic array iodide ions (r =220pm) in which the anions are touching along the face of the...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography?...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
Introduction: The technique used to separate an organic compound from a mixture of compounds is called...
Introduction: The technique used to separate an organic compound from a mixture of compounds is called Extraction. Extraction process selectively dissolves one or more of the mixture compounds into a suitable solvent. The solution of these dissolved compounds is referred to as the Extract. Here the organic solvent dichloromethane is used to extract caffeine from an aqueous extract of tea leaves because caffeine is more soluble in dichloromethane (140 mg/ml) than it is in water (22 mg/ml). However, there are...
Please right an in depth discussion about part C. We we’re not able to get any...
Please right an
in depth discussion about part C. We we’re not able to get any
recrystallization from our unknown. Talk about possible failures
that could of happen that prevented us to not get any or our
unknown to recrystallize. Thanks so much!
Experiment 1: Solids: Recrystallization and Melting Point Learning Outcomes: Upon completion of this lab, students will be able to perform the technique of recrystallization of an impure solid as well as be able to determine an appropriate...
CHEM-C 105 Principles of Chemistry I Summer Semester Practice Midterm Exam. 7? questions Note that questions are...
CHEM-C 105 Principles of Chemistry I Summer Semester Practice Midterm Exam. 7? questions Note that questions are graded by answer only and work doesn't count HOW do You Aind 1. In which of the following are the masses given in the correct order? A. eg < mg <g< kg the Correct order 2 B. eg < g < kg < mg C. kg <g<eg < mg D. mg< eg<g< kg 2. For each of the diagrams above, determine how accurate...
The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons...
The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons . Which of the following would have the largest size? a) an atom b) a molecule c) a proton d) a neutron e) an electron 3. Isotopes of an element differ in the number of a) protons in the nucleus b) electrons in the nucleus © neutrons in the nucleus d) electron clouds e) energy levels they contain 4. VO The atomic number represents...
Separating a Mixture, Recrystallization, pre-lab assignment could you also explain why you chose that substance for...
Separating a Mixture, Recrystallization, pre-lab
assignment
could you also explain why you chose that substance for the empty
spaces and question marks
EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
When an ionic compound dissolves in water, the cations and anions are separated. Ions in solution will result in that solution conducting electricity, an electrolyte. Some solutions are strong electrolytes while others are weak electrolytes. 1. What do you think is giving rise to electrical conductivity? ions in a crystal 2. This is a diagram showing ions in a crystal. Draw a diagram showing the particles in 1) strong electrolyte, and 2) weak electrolyte. Pay attention to how the water...
Essex County College Division of Biology and Chemistry General Chemistry II Problem Set I CHM 10 1. Which of the following mixtures have components which can be separated by filtration? A) colloids B) solutions D) all of these 2. In most liquid solutions, the component present in the larger amount is called the A) dispersed medium B) emulsifying agent C) solute D) solvent 3. lodine, 12(s), is more soluble in dichloromethane, CHCI than in water because A) both iodine and...
Post-lab question Part A 1. Metallic sodium forms a body centered cubic crystal. Why would the water displacement method used in part A not be suitable to determine the density of sodium? (Hint: watch the following video to help you answer this question: https://www.youtube.com/watch?v=18tOtZKpi04) 2. Calculate the density of sodium. (The radius of a sodium atom is 186pm) Post-lab Question Part B: Consider cubic array iodide ions (r =220pm) in which the anions are touching along the face of the...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
Please right an
in depth discussion about part C. We we’re not able to get any
recrystallization from our unknown. Talk about possible failures
that could of happen that prevented us to not get any or our
unknown to recrystallize. Thanks so much!
Experiment 1: Solids: Recrystallization and Melting Point Learning Outcomes: Upon completion of this lab, students will be able to perform the technique of recrystallization of an impure solid as well as be able to determine an appropriate...
CHEM-C 105 Principles of Chemistry I Summer Semester Practice Midterm Exam. 7? questions Note that questions are graded by answer only and work doesn't count HOW do You Aind 1. In which of the following are the masses given in the correct order? A. eg < mg <g< kg the Correct order 2 B. eg < g < kg < mg C. kg <g<eg < mg D. mg< eg<g< kg 2. For each of the diagrams above, determine how accurate...
The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons . Which of the following would have the largest size? a) an atom b) a molecule c) a proton d) a neutron e) an electron 3. Isotopes of an element differ in the number of a) protons in the nucleus b) electrons in the nucleus © neutrons in the nucleus d) electron clouds e) energy levels they contain 4. VO The atomic number represents...
Separating a Mixture, Recrystallization, pre-lab
assignment
could you also explain why you chose that substance for the empty
spaces and question marks
EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
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