Homework Answers
when ammonium nitrate solid is dissolved in water at room temperature the beaker containing the solution
Ans C.) will likely feel cold to the touch
because the reaction is endothermic so surrounding is cold.
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Question 3 1 pts The heat of solution of ammonium nitrate is 26.2 kJ/mol. When ammonium...
Prelab: 1. The molar heat of solution of ammonium nitrate is +25.7 kJ/mol. Assuming the specific heat of the resulting...
Prelab: 1. The molar heat of solution of ammonium nitrate is +25.7 kJ/mol. Assuming the specific heat of the resulting solution is equal to that of pure water, calculate the final temperature of 55.0 grams of water (initially at 22.9 °C) after the addition of 3.0 grams of NH4NO3.
Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and...
Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction: NH4NO3(s) → NH(aq) + NO3 (aq) In order to measure the enthalpy change for this reaction, 1.25 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8 °C and the final temperature (after...
E) Mg?"(aq) + 2 NO, (aq) —> Mg(NO)>(s) 8. When solid ammonium nitrate (NH.NOs) dissolves in...
E) Mg?"(aq) + 2 NO, (aq) —> Mg(NO)>(s) 8. When solid ammonium nitrate (NH.NOs) dissolves in water, the process is endothermic, with AH solution = +25.69 kJ/mol. (This reaction has been used in commercial cold packs.) If 5,60 8 NH.NO, is dissolved in 100.0 g of water at 22.0° C, what is the final temperature of the solution? The mass of the solution is 105.6 g (100.0 8 +5,60 g = 105.68) and its specific heat capacity is 4.18 J/(8-K)....
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...
Experiment 13-Post-Lab Assignment 1. Athletes use cold packs containing ammonium nitrate solutions to ice their injuries....
Experiment 13-Post-Lab Assignment 1. Athletes use cold packs containing ammonium nitrate solutions to ice their injuries. A 1.25 G sample of ammonium nitrate is dissolved in 25.0 mL of water to form a solution. The temperature of the solution falls from 25.8°C to 21.9°C. Find the enthalpy of the reaction (AH ), in kJ/mol. Assume the density of water is 1.00 g/mL and the heat capacity of the total solution to be 4.184 J/g °C 2. Calculate AHⓇ in kJ/mol...
QUESTION: Write a flow scheme for the work-up. THE WORK UP:
QUESTION:
Write a flow scheme for the work-up.
THE WORK UP:
C. Work-up (save all layers) and Isolation of Product MgBrCl Benzoic acid Transfer the mixture into a test tube. Rinse the beaker with about 3 mL of regular (not anhydrous) diethyl ether and pour the washings into the test tube. There should be two distinct layers in the test tube Remove the aqueous layer (to be discarded) and shake the ether layer with about 2 mL of 3 M...
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...
Please help with question 3. Thank you! Disposal of waste: When necessary, all organic waste must...
Please help with question 3. Thank you!
Disposal of waste: When necessary, all organic waste must be disposed into the organic waste container, all aqueous waste to the aqueous waste container and all solid waste to the solid waste container. Nothing is disposed in the sink or trash can. Synthesis of acetanilide In a dry small conical vial, dissolve 300 mg (or 30 drops) of freshly distilled aniline in 1.0 mL of 1.0 M hydrochloric acid. Swirl the mixture to...
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...
(4 pts) (4 pts) (4 pts) (1 pts) 5. Calculations 6. Conclusions 7. Post lab Questions...
(4 pts) (4 pts) (4 pts) (1 pts) 5. Calculations 6. Conclusions 7. Post lab Questions 8. TA signature POST LAB QUESTIONS: 1. Why do we add methanol to the reaction if we see a purple ring? 2. What reaction is occurring with the methanol (show reaction)? Does this reactior affect your product? 3. Why do you get a precipitate when adding the HCl to make the solution acidic? Exp 8-5 Experiment 8: Preparation of Adipic Acid from Cyclohexene Oxidation...
Prelab: 1. The molar heat of solution of ammonium nitrate is +25.7 kJ/mol. Assuming the specific heat of the resulting solution is equal to that of pure water, calculate the final temperature of 55.0 grams of water (initially at 22.9 °C) after the addition of 3.0 grams of NH4NO3.
Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction: NH4NO3(s) → NH(aq) + NO3 (aq) In order to measure the enthalpy change for this reaction, 1.25 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8 °C and the final temperature (after...
E) Mg?"(aq) + 2 NO, (aq) —> Mg(NO)>(s) 8. When solid ammonium nitrate (NH.NOs) dissolves in water, the process is endothermic, with AH solution = +25.69 kJ/mol. (This reaction has been used in commercial cold packs.) If 5,60 8 NH.NO, is dissolved in 100.0 g of water at 22.0° C, what is the final temperature of the solution? The mass of the solution is 105.6 g (100.0 8 +5,60 g = 105.68) and its specific heat capacity is 4.18 J/(8-K)....
Experiment 13-Post-Lab Assignment 1. Athletes use cold packs containing ammonium nitrate solutions to ice their injuries. A 1.25 G sample of ammonium nitrate is dissolved in 25.0 mL of water to form a solution. The temperature of the solution falls from 25.8°C to 21.9°C. Find the enthalpy of the reaction (AH ), in kJ/mol. Assume the density of water is 1.00 g/mL and the heat capacity of the total solution to be 4.184 J/g °C 2. Calculate AHⓇ in kJ/mol...
QUESTION:
Write a flow scheme for the work-up.
THE WORK UP:
C. Work-up (save all layers) and Isolation of Product MgBrCl Benzoic acid Transfer the mixture into a test tube. Rinse the beaker with about 3 mL of regular (not anhydrous) diethyl ether and pour the washings into the test tube. There should be two distinct layers in the test tube Remove the aqueous layer (to be discarded) and shake the ether layer with about 2 mL of 3 M...
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...
Please help with question 3. Thank you!
Disposal of waste: When necessary, all organic waste must be disposed into the organic waste container, all aqueous waste to the aqueous waste container and all solid waste to the solid waste container. Nothing is disposed in the sink or trash can. Synthesis of acetanilide In a dry small conical vial, dissolve 300 mg (or 30 drops) of freshly distilled aniline in 1.0 mL of 1.0 M hydrochloric acid. Swirl the mixture to...
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...
(4 pts) (4 pts) (4 pts) (1 pts) 5. Calculations 6. Conclusions 7. Post lab Questions 8. TA signature POST LAB QUESTIONS: 1. Why do we add methanol to the reaction if we see a purple ring? 2. What reaction is occurring with the methanol (show reaction)? Does this reactior affect your product? 3. Why do you get a precipitate when adding the HCl to make the solution acidic? Exp 8-5 Experiment 8: Preparation of Adipic Acid from Cyclohexene Oxidation...
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