Explain why multiple extractions with smaller volumes of the extraction solvent are typically "better" than single...
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was recovered with two extractions. One large extraction would have only obtained the initial 90%.
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Explain why multiple extractions with smaller volumes of the extraction solvent are typically "better" than single...
Explain why 2 extractions with 2 smaller volumes of solvent is more effective than 1 larger...
Explain why 2 extractions with 2 smaller volumes of solvent is more effective than 1 larger extraction.
based on the calculations why is it better to extract using smaller amounts of solvent multiple...
based on the calculations why is it better to extract using smaller
amounts of solvent multiple times than it is with a larger amount
one time?
vol. ether conc. insher 10.45 Wt. conc- er inter Vol water Use the equation above to calculate the weight and percent of Z recovered if 6.2 g of Z in 100 mL of water are extracted with 50 mL of ether. SHOW CALCULATIONS. [ HINT: If xwt. in ether, then (6.2-x)= wt. in water.]...
Can someone please explain why the answer is the answer and the other choices are true....
Can someone please explain why the answer is the answer and the other choices are true. PLease dont just give me the answer 5) Which of the following statements about extraction is false? A) The extraction solvent should form an emulsion with the aqueous phase B) The extraction solvent should be immiscible with the aqueous phase C) The extraction solvent should have a different density than the aqueous phase D) Multiple extractions are more productive than one extraction
The volume of phloem tissue in a stem is typically much smaller than the volume of...
The volume of phloem tissue in a stem is typically much smaller than the volume of xylem tissue because of which of the following? xylem dies quickly and, therefore, needs to be replaced frequently phloem conduits are much wider, and because flow is proportional to conduit radius raised to the fourth power, fewer phloem conduits are needed the pressure gradient driving water flow in the phloem is metabolically generated and, therefore, can be much larger than the environmentally generated xylem...
Explain why one would recrystallize a solid from a solvent pair instead of a single solvent....
Explain why one would recrystallize a solid from a solvent pair instead of a single solvent. Explain how it works in terms of solubilities.
1. Why is the QRS complex typically larger than the P wave? Because of the large...
1. Why is the QRS complex typically larger than the P wave? Because of the large tissue mass 2. A problem with which wave would most likely indicate an atrial abnormality 3. The upper limit for a normal PR interval is 0.16 seconds. What could cause the PR interval to be abnormally long? 4. In response to hypertrophy of the left ventricle, would you expect the QRS complex to be larger or smaller? Explain your answer.
Pre-laboratory Questions 1. Although it is a less efficient solvent for this extraction, why is 2-propanol...
Pre-laboratory Questions 1. Although it is a less efficient solvent for this extraction, why is 2-propanol used in this extraction rather than chloroform or methylene chloride? 2. What is the purpose of adding sodium carbonate to the aqueous solution? Be the concentration of sodium carbonate incest, it undergoes hydolysis to form sodun hydroride 3. Why it is necessary to add sodium chloride to the water before the caffeine is extracted with 2-propanol?
D Question 10 Why is Bra smaller atom than As? Br is actually larger than As...
D Question 10 Why is Bra smaller atom than As? Br is actually larger than As because it has more protons. As is larger because it has more protons and electrons. Br has more protons to pull the electrons in closer. Br is smaller because it has less protons and electrons making it smaller. Br is actually larger than As because it has a larger atomic mass. Question 11 Explain why metals have lower ionization energy than nonmetals. No answer...
7.23 Explain why the atomic radius of Be is smaller than that of Li.
7.23 Explain why the atomic radius of Be is smaller than that of Li.
Is PA larger than, smaller than, or equal to pa? Explain. A B
Is PA larger than, smaller than, or equal to pa? Explain. A B
based on the calculations why is it better to extract using smaller
amounts of solvent multiple times than it is with a larger amount
one time?
vol. ether conc. insher 10.45 Wt. conc- er inter Vol water Use the equation above to calculate the weight and percent of Z recovered if 6.2 g of Z in 100 mL of water are extracted with 50 mL of ether. SHOW CALCULATIONS. [ HINT: If xwt. in ether, then (6.2-x)= wt. in water.]...
1. Why is the QRS complex typically larger than the P wave? Because of the large tissue mass 2. A problem with which wave would most likely indicate an atrial abnormality 3. The upper limit for a normal PR interval is 0.16 seconds. What could cause the PR interval to be abnormally long? 4. In response to hypertrophy of the left ventricle, would you expect the QRS complex to be larger or smaller? Explain your answer.
Pre-laboratory Questions 1. Although it is a less efficient solvent for this extraction, why is 2-propanol used in this extraction rather than chloroform or methylene chloride? 2. What is the purpose of adding sodium carbonate to the aqueous solution? Be the concentration of sodium carbonate incest, it undergoes hydolysis to form sodun hydroride 3. Why it is necessary to add sodium chloride to the water before the caffeine is extracted with 2-propanol?
D Question 10 Why is Bra smaller atom than As? Br is actually larger than As because it has more protons. As is larger because it has more protons and electrons. Br has more protons to pull the electrons in closer. Br is smaller because it has less protons and electrons making it smaller. Br is actually larger than As because it has a larger atomic mass. Question 11 Explain why metals have lower ionization energy than nonmetals. No answer...
7.23 Explain why the atomic radius of Be is smaller than that of Li.
Is PA larger than, smaller than, or equal to pa? Explain. A B
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