help on question1 and part a and b
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70% 9:24 AM Expert Q&A 0.502 g Mass...
please answer all parts I am trying to check my answers. Recrystallization of Acetanilide Recrystallization is...
please answer all parts I am trying to check my
answers.
Recrystallization of Acetanilide Recrystallization is an important method used by chemists to purify solid compounds. When a chemist conducts a chemical reaction as shown in Scheme 1, it will rarely go to 100% completion, and will frequently produce byproducts. These byproducts and some of the unreacted starting materials will be present in the end as impurities. Chemists need ways to remove these unwanted impurities so they can isolate their...
Bromination of Acetanilide In a 25-mL Erlenmeyer flask, dissolve 0.68 g of acetanilide in approximately 4...
Bromination of Acetanilide In a 25-mL Erlenmeyer flask, dissolve 0.68 g of acetanilide in approximately 4 mL glacial acetic acid. Record the exact amount of the limiting reactant that you used. Add a stir bar followed by 1.6 g pyridinium tribromide. Heat the mixture to ~60°C in a warm water bath for 10 minutes. After the 10 minutes, add 15 mL water and approximately 2 mL saturated sodium bisulfite solution to remove excess bromine, which shows by the disappearance of...
During the experiment he obtained the following data: Mass of Beaker = 48.936 g Mass of...
During the experiment he obtained the following data: Mass of Beaker = 48.936 g Mass of Beaker & methyl salicylate = 50.139 g Conc of NaOH sln = 4.0 M Volume of NaOH added = 10.0 mL Conc of HCl sln = 4.0 M Volume of HCl added = 18.0 mL Complete the following calculations based on this data: Mass of methyl salicylate used = ______ g methyl salicylate Moles of methyl salicylate used = ______ mol methyl salicylate Moles...
(Q#1) Hydroxyapatite has the formula Ca5(PO4)3(OH) and is the main mineral component of dental enamel and...
(Q#1) Hydroxyapatite has the formula Ca5(PO4)3(OH) and is the main mineral component of dental enamel and bone, and encourages bone growth when placed as bone graft. Hydroxyapatite is prepared from aqueous acid and dilute calcium hydroxide solution. If you mix 115 g of 80.2 % by mass phosphoric acid solution with 74.8 g of calcium hydroxide, what mass in g of hydroxypatite is formed assuming the reaction goes to completion? (Q#2) Seratonin is a chemical neurotransmitter in the brain and...
The great French chemist Antoine Lavoisier discovered the Law of Conservation of Mass in part by...
The great French chemist Antoine Lavoisier discovered the Law of Conservation of Mass in part by doing a famous experiment in 1775. In this experiment Lavoisier found that mercury(II) oxide, when heated, decomposed into liquid mercury and an invisible and previously unknown substance: oxygen gas. 1. Write a balanced chemical equation, including physical state symbols, for the decomposition of solid mercury(11) oxide (Hgo) into liquid mercury and gaseous dioxygen. 2 HgOG) - 2Hg() + O2(g) x 5 ? 2. Suppose...
PREPARATION OF PHARMACEUTICALS - Fischer Esterification Reactions Q: Calculate the expected mass of both methyl salicylate and aspirin assuming 100% yield. EXPERIMENT7 PREPARATION OF PHARMACEUTICALS...
PREPARATION OF PHARMACEUTICALS - Fischer Esterification
Reactions
Q: Calculate the expected mass of both methyl salicylate and
aspirin assuming 100% yield.
EXPERIMENT7 PREPARATION OF PHARMACEUTICALS Fischer Esterification Reactions Almost 2500 years ago, physicians such as Hippocrates recommended that patients chew on the bark of the willow to alleviate pain. The active ingredient in willow bark was found to be salicin, a compound made of a molecule of salicyl alcohol bonded to a p-D-glucose molecule. In the stomach, the bond between...
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...
need help ASAP Question 9 4 pts Exactly 1.100 g of CO2(g) was introduced into a...
need help ASAP
Question 9 4 pts Exactly 1.100 g of CO2(g) was introduced into a 1.00-L flask that already contained some O2 gas. The flask was warmed to 100 °C and the total pressure was found to be 815 mmHg. No chemical reaction occurred between CO2 and 02. Calculate the mass of Oz in the flask. 1.12 g 02 O 0.160 g 02 O 0.754 g 02 O 0.820 g 02 O 0.321 g 02 1.5 pts Question 10...
1. Moles of Reactant to Mass of Reactant: Identify the iodide ions and ozone in the...
1. Moles of Reactant to Mass of Reactant: Identify the iodide ions and ozone in the balanced chemical equation. Use mole ratio, then convert to grams. A method used by the EPA for determining the ozone concentration in the air is to pass an air sample through a bubbler containing iodide ions. The iodide ions remove the ozone according to the following reaction: O3(g) + 2 I-(aq) + H2O(l) → O2(g) + I2(aq) + 2 OH-(aq) How many grams of ozone...
Activity 10 How Much Product Will My Reaction Yield? 37 6. Carly the chemistry student performs...
Activity 10 How Much Product Will My Reaction Yield? 37 6. Carly the chemistry student performs an experiment with vinegar (active ingredient acetic acid, CH, COOH) and baking soda (NaHCO). Her professor asks her to place varying amounts of baking soda and vinegar into scalable plastic sandwich bags, quickly seal the bags, and observe the reaction. The balanced chemical equation for the reaction is given here. NaHCO, (aq) + CH,COOH(ag) - CO,(8) + H,O(l) + NaCH COO(ag) a) Use limiting...
please answer all parts I am trying to check my
answers.
Recrystallization of Acetanilide Recrystallization is an important method used by chemists to purify solid compounds. When a chemist conducts a chemical reaction as shown in Scheme 1, it will rarely go to 100% completion, and will frequently produce byproducts. These byproducts and some of the unreacted starting materials will be present in the end as impurities. Chemists need ways to remove these unwanted impurities so they can isolate their...
The great French chemist Antoine Lavoisier discovered the Law of Conservation of Mass in part by doing a famous experiment in 1775. In this experiment Lavoisier found that mercury(II) oxide, when heated, decomposed into liquid mercury and an invisible and previously unknown substance: oxygen gas. 1. Write a balanced chemical equation, including physical state symbols, for the decomposition of solid mercury(11) oxide (Hgo) into liquid mercury and gaseous dioxygen. 2 HgOG) - 2Hg() + O2(g) x 5 ? 2. Suppose...
PREPARATION OF PHARMACEUTICALS - Fischer Esterification
Reactions
Q: Calculate the expected mass of both methyl salicylate and
aspirin assuming 100% yield.
EXPERIMENT7 PREPARATION OF PHARMACEUTICALS Fischer Esterification Reactions Almost 2500 years ago, physicians such as Hippocrates recommended that patients chew on the bark of the willow to alleviate pain. The active ingredient in willow bark was found to be salicin, a compound made of a molecule of salicyl alcohol bonded to a p-D-glucose molecule. In the stomach, the bond between...
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...
need help ASAP
Question 9 4 pts Exactly 1.100 g of CO2(g) was introduced into a 1.00-L flask that already contained some O2 gas. The flask was warmed to 100 °C and the total pressure was found to be 815 mmHg. No chemical reaction occurred between CO2 and 02. Calculate the mass of Oz in the flask. 1.12 g 02 O 0.160 g 02 O 0.754 g 02 O 0.820 g 02 O 0.321 g 02 1.5 pts Question 10...
Activity 10 How Much Product Will My Reaction Yield? 37 6. Carly the chemistry student performs an experiment with vinegar (active ingredient acetic acid, CH, COOH) and baking soda (NaHCO). Her professor asks her to place varying amounts of baking soda and vinegar into scalable plastic sandwich bags, quickly seal the bags, and observe the reaction. The balanced chemical equation for the reaction is given here. NaHCO, (aq) + CH,COOH(ag) - CO,(8) + H,O(l) + NaCH COO(ag) a) Use limiting...
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