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Tetrachloroethylene (1) is used as a dry cleaning solvent; however, it is currently being phased out...
The recrystallization technique discusses using a drying agent before recrystallizing out of an organic solvent, however,...
The recrystallization technique discusses using a drying agent before recrystallizing out of an organic solvent, however, we omitted the drying step before evaporating off the ethyl acetate. Since we didn't dry this sample, what potential issues might this have caused for analysis of the benzoin sample? Be specific about the effects it would have (if any) on each of the three analysis techniques we used. (4 pts) Melting Point, thin layer chromotography, and gas chromotography
Choose the one alternative that best completes the statement or answers the question. 1 kilogram =...
Choose the one alternative that best completes the statement or answers the question. 1 kilogram = 1000 milligrams 10,000 1 times 10^-6 1,00,000 1,000 None of the above. Of the objects below. ______ is the most dense. an object with a volume of 139 mL, and a mass of 93 g an object with a volume of 13 cm^3, and a mass of 1.29 times 10^3g an object with a volume of 2.5L, and a mass of 12.5 kg An...
Hydroxychloroquine is being used to treat Covid-19 victims. Unfortunately, however, there are side effects. In clinical...
Hydroxychloroquine is being used to treat Covid-19 victims. Unfortunately, however, there are side effects. In clinical trials, 67 out of 111 (about 60%) patients taking hydroxychloroquine complained of blurry vision. Suppose it is known that 50% of patients taking alternative treatments complain of this vision symptom. Since 67/111 is higher than 50%, Lynn wonders if hydroxychloroquine is truly associated with increased retinal damage, or if this sample data value is just a normal occurrence. (A) Perform a hypothesis test for...
What are the desirable characteristics of a solvent to be used in the recrystallisation of a...
What are the desirable characteristics of a solvent to be used
in the recrystallisation of a solid product? (Hint: what is the
underlying purpose of doing recrystallisation, aside from making
the product look attractive?)
EXPERIMENT5 PREPARATION OF BENZOIC ACID Oxidation of a Primary Alcohol In this experiment, a primary alcohol (benzyl alcohol) is oxidised to a carboxylic acid (benzoic acid) by a strong oxidising agent (potassium permanganate) Because the synthesis reaction is carried out in basic conditions, the carboxylic acid...
Go Huskies is considering replacing a point-of-sale system that is currently being used. The old system is...
Go Huskies is considering replacing a point-of-sale system that is currently being used. The old system is fully depreciated but can be used for another 4 years, at which time it would have no salvage value. Go Huskies can sell the old system for $45,000 on the date that the new system is purchased. Go Huskies has an effective tax rate of 35%, so the gain on the sale of the old system will be fully taxable. If the purchase occurs, the new...
Mechanism An explanation for the mechanism is given in page 376 and 377. It says the...
Mechanism An explanation for the mechanism is given in page 376 and 377. It says the reaction is not a free radical reaction, it is faster in acids and it requires HCIO and most likely Cl2 (elemental chlorine). Bleach is a basic solution of NaOCI sodium hypochlorite). It is made by the following reaction: 2 NaOH+ Cl2 <>NaoCI+NaCI + H20 Using your knowledge of equilibriums, what is the role of the acetic acid? (4 points) Hypochlorous acid is obtained from...
PLEASE Help ASAP!! 1. Some patients being treated for cardiovascular disease are partially resistant to statin...
PLEASE Help ASAP!! 1. Some patients being treated for cardiovascular disease are partially resistant to statin drugs and have LDL levels that are still unacceptably high. Treatment with ETC-1002 has been shown to be a good alternative as serum LDL levels can be significantly decreased in these patients (Esperion stock prices rose 19% on this news). However, one must be concerned about safety and tolerability of new drugs and tests need to be conducted. What were the major safety and...
the Baking Grayson Company produces an industrial chemical used for cleaning and lubricating machinery. In the...
the Baking Grayson Company produces an industrial chemical used for cleaning and lubricating machinery. In the Mixing Department, liquid and dry chemicals are blended to form slurry. Output is measured in gallons. Department, the slurry is subjected to high heat, and the residue appears in irregular lumps. Output is measured in pounds. In the Grinding Department, the irregular lumps are ground into a powder, and this powder is placed in 50-pound bags. Output measured in bags produced. n April, the...
1 Week 2-Discussion Activities Hospitals, nursing homes, and other patient care facilities require an effective cleaning...
1 Week 2-Discussion Activities Hospitals, nursing homes, and other patient care facilities require an effective cleaning and disinfection program to maintain aseptic conditions and prevent microbial contamination and infection control problems. The qualification of a chemical disinfectant to be used in these environments is extremely important Disinfectant qualifications require more planning, time and resources than many facilities realize. The patient care issues and difficulties that will occur if a disinfectant does not perform as it should is a major concern...
Write out your separation scheme for this experiment. 1. Heat 75 mL of water to 90...
Write out your separation scheme for this experiment. 1. Heat 75 mL of water to 90 °C in a 250-mL beaker. 2. While the water is being heated, place 250 mg of salicylic acid, 1 drop of 85% phosphoric acid and 0.5 mL of acetic anhydride in a test tube. Add a boiling chip to the mixture and gently shake it in order to mix the reactants. 3. Heat the tube in the beaker of water at 85 - 90...
The recrystallization technique discusses using a drying agent before recrystallizing out of an organic solvent, however, we omitted the drying step before evaporating off the ethyl acetate. Since we didn't dry this sample, what potential issues might this have caused for analysis of the benzoin sample? Be specific about the effects it would have (if any) on each of the three analysis techniques we used. (4 pts) Melting Point, thin layer chromotography, and gas chromotography
Choose the one alternative that best completes the statement or answers the question. 1 kilogram = 1000 milligrams 10,000 1 times 10^-6 1,00,000 1,000 None of the above. Of the objects below. ______ is the most dense. an object with a volume of 139 mL, and a mass of 93 g an object with a volume of 13 cm^3, and a mass of 1.29 times 10^3g an object with a volume of 2.5L, and a mass of 12.5 kg An...
What are the desirable characteristics of a solvent to be used
in the recrystallisation of a solid product? (Hint: what is the
underlying purpose of doing recrystallisation, aside from making
the product look attractive?)
EXPERIMENT5 PREPARATION OF BENZOIC ACID Oxidation of a Primary Alcohol In this experiment, a primary alcohol (benzyl alcohol) is oxidised to a carboxylic acid (benzoic acid) by a strong oxidising agent (potassium permanganate) Because the synthesis reaction is carried out in basic conditions, the carboxylic acid...
Mechanism An explanation for the mechanism is given in page 376 and 377. It says the reaction is not a free radical reaction, it is faster in acids and it requires HCIO and most likely Cl2 (elemental chlorine). Bleach is a basic solution of NaOCI sodium hypochlorite). It is made by the following reaction: 2 NaOH+ Cl2 <>NaoCI+NaCI + H20 Using your knowledge of equilibriums, what is the role of the acetic acid? (4 points) Hypochlorous acid is obtained from...
the Baking Grayson Company produces an industrial chemical used for cleaning and lubricating machinery. In the Mixing Department, liquid and dry chemicals are blended to form slurry. Output is measured in gallons. Department, the slurry is subjected to high heat, and the residue appears in irregular lumps. Output is measured in pounds. In the Grinding Department, the irregular lumps are ground into a powder, and this powder is placed in 50-pound bags. Output measured in bags produced. n April, the...
1 Week 2-Discussion Activities Hospitals, nursing homes, and other patient care facilities require an effective cleaning and disinfection program to maintain aseptic conditions and prevent microbial contamination and infection control problems. The qualification of a chemical disinfectant to be used in these environments is extremely important Disinfectant qualifications require more planning, time and resources than many facilities realize. The patient care issues and difficulties that will occur if a disinfectant does not perform as it should is a major concern...
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