Homework Answers
Add Answer to:
Impure crystalline (solid) substances can be purified by recrystallization from a suitable solvent. Arrange the steps...
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...
After fully dissolving an impure compound in 100 mL of hot ether, the solution was cooled...
After fully dissolving an impure compound in 100 mL of hot ether, the solution was cooled and put on ice, but no crystals formed. option as the next step to take in the recrystallization procedure in order to obtain pure crystalline material. O A. Remove 60% of the solution by pouring it from the flask. Reheat the solution, cool, and put on ice. O B. Add an additional 25 mL of ether to the solution while on ice. O C....
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer...
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer the following questions related to this technique, which is outlined in the diagram below. (2 pts. each) Watch ass Watch Glass Hot solvent Insoluble mpurities Dissolve the compound Continue heating if necessary hot solvent Fluted fiter paper Continue heating until half of the solvent is evaporated Vacuum filtration Allowed to cool to room temperature then put in an ice bath HOT Gravity filtration 3....
Benzydrol will be recrystallized from hexane during this experiment. Please identify the following statements about recrystallization...
Benzydrol will be recrystallized from hexane during this experiment. Please identify the following statements about recrystallization as true or false. Select all that are True. 1 Start heating the flask with just enough solvent in the flask to cover the sample. 2 When you collect your crystals you can wash them with a small amount of the recrystallization solvent, but you should cool the solvent down in an ice bath before using it. 3 If you are short on time,...
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...
SYNTHESIS OF trans-p-ANISALACETOPHENONE Prepare a table of all chemicals used in the procedure with their purpose...
SYNTHESIS OF trans-p-ANISALACETOPHENONE
Prepare a table of all chemicals used in the procedure with
their purpose
Melting point of trans-p-anisalacetophenone (with source) and
Molar mass of trans-p-anisalacetophenone (with source) (i cant find
these two things anywhere)
Procedure: 1. Carefully measure 1.0 mL each of p-anisaldehyde and acetophenone and place them in a screw-cap testtube. 2. To this add 3.0 mL of 95% ethanol. Shake the test tube gently to achieve a homogenous mixture. 3. Add 6-7 drops of 40% sodium...
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...
i need to calculate the theortetical yield by finding the limiting reactant of the experiment by...
i need to calculate the theortetical yield by finding the
limiting reactant of the experiment by converting reactants to
product, then calculate the percent yield using the limiting
reactant
-in my experiment the amout of crystals i obtained was 1.232 g
(watch glass + filter paper = 31.228 g and watch glass, filter
paper, + crystals = 32.460 g)
REACTION SCHEME H сно, ОН- ОСH, CH panisaldehyde acetophenone Molar Mass: 120.15g/mol Molar Mass: 136.15g/mol Molar Mass: 239.30g/mol Density: 1.119g/mL Density:...
Running the Reaction Add 0.100 g benzil and 0.30 mL 95% ethanol to a 3-mL conical vial. Place a s...
Determine the theoretical yield and limiting reagent
Running the Reaction Add 0.100 g benzil and 0.30 mL 95% ethanol to a 3-mL conical vial. Place a spin vane in the vial and attach an air condenser. Heat the mixture with an aluminum block (90-100°C) while stirring until the benzil has dissolved (see inset in Tech- nique 6, Figure 6.1A). Using a 9-inch Pasteur pipette, add dropwise 0.25 mL of an aqueous potassium hydroxide solution' downward through the condenser into the...
this is the procedure of melting point experiment ( preparation acetanilid) I want the summarize of...
this is the procedure of melting point experiment
( preparation acetanilid) I want the summarize of this
procedure
EXPERIMENTAL PROCEDURE Measure 0.100 to 0.125 g of aniline (in dropper bottles near the balances) into a tared reaction tube from the microscale kit and record the weight to the nearest milligram. Add 2 mL of distilled water and 6 to 7 drops (an excess amount, 21 drops =1 mL) of acetic anhydride. Stir the mixture for about 4 minutes untiha solid...
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...
After fully dissolving an impure compound in 100 mL of hot ether, the solution was cooled and put on ice, but no crystals formed. option as the next step to take in the recrystallization procedure in order to obtain pure crystalline material. O A. Remove 60% of the solution by pouring it from the flask. Reheat the solution, cool, and put on ice. O B. Add an additional 25 mL of ether to the solution while on ice. O C....
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer the following questions related to this technique, which is outlined in the diagram below. (2 pts. each) Watch ass Watch Glass Hot solvent Insoluble mpurities Dissolve the compound Continue heating if necessary hot solvent Fluted fiter paper Continue heating until half of the solvent is evaporated Vacuum filtration Allowed to cool to room temperature then put in an ice bath HOT Gravity filtration 3....
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...
SYNTHESIS OF trans-p-ANISALACETOPHENONE
Prepare a table of all chemicals used in the procedure with
their purpose
Melting point of trans-p-anisalacetophenone (with source) and
Molar mass of trans-p-anisalacetophenone (with source) (i cant find
these two things anywhere)
Procedure: 1. Carefully measure 1.0 mL each of p-anisaldehyde and acetophenone and place them in a screw-cap testtube. 2. To this add 3.0 mL of 95% ethanol. Shake the test tube gently to achieve a homogenous mixture. 3. Add 6-7 drops of 40% sodium...
i need to calculate the theortetical yield by finding the
limiting reactant of the experiment by converting reactants to
product, then calculate the percent yield using the limiting
reactant
-in my experiment the amout of crystals i obtained was 1.232 g
(watch glass + filter paper = 31.228 g and watch glass, filter
paper, + crystals = 32.460 g)
REACTION SCHEME H сно, ОН- ОСH, CH panisaldehyde acetophenone Molar Mass: 120.15g/mol Molar Mass: 136.15g/mol Molar Mass: 239.30g/mol Density: 1.119g/mL Density:...
Determine the theoretical yield and limiting reagent
Running the Reaction Add 0.100 g benzil and 0.30 mL 95% ethanol to a 3-mL conical vial. Place a spin vane in the vial and attach an air condenser. Heat the mixture with an aluminum block (90-100°C) while stirring until the benzil has dissolved (see inset in Tech- nique 6, Figure 6.1A). Using a 9-inch Pasteur pipette, add dropwise 0.25 mL of an aqueous potassium hydroxide solution' downward through the condenser into the...
this is the procedure of melting point experiment
( preparation acetanilid) I want the summarize of this
procedure
EXPERIMENTAL PROCEDURE Measure 0.100 to 0.125 g of aniline (in dropper bottles near the balances) into a tared reaction tube from the microscale kit and record the weight to the nearest milligram. Add 2 mL of distilled water and 6 to 7 drops (an excess amount, 21 drops =1 mL) of acetic anhydride. Stir the mixture for about 4 minutes untiha solid...
Most questions answered within 3 hours.
-
On a recent quiz, the class mean was 75 with a standard
deviation of 2.2. Calculate...
asked 3 minutes ago -
Discuss the Coefficient of Restitution in an elastic collision
compared to the Coefficient of Restitution in...
asked 8 minutes ago -
Pretend that you are
the audit manager on an annual financial statement audit engagement
for a...
asked 17 minutes ago -
A certain lens focuses light from an object 1.65 m away as an
image 41.8 cm...
asked 16 minutes ago -
Which metal has a resistivity that is within the range or
closest to 4.2X10^-6 to 4.7X10^-6...
asked 22 minutes ago -
5.) Suppose a researcher collected data on the mean height of
tomato plants grown in organic...
asked 34 minutes ago -
(b) A medical statistician wants to estimate the average weight
loss of people who are on...
asked 39 minutes ago -
In scala,
Can you explain what is the difference between them, and why the
first one...
asked 40 minutes ago -
True (T) or False (F) Questions
In a queuing system, if the system’s utilization is 100%,...
asked 49 minutes ago -
What is the total energy transported per hour along a narrow
cylindrical laser beam 1.60 mm...
asked 57 minutes ago -
Key Assessment PAT 6: Sayles Chapter 14 Application Exercise
2
Beginning January 1, Community Hospital had...
asked 1 hour ago -
Let's assume the following data represents the time from when a
patient is discharged from North...
asked 1 hour ago