In a synthesis experiment 3mL of 25% (v/v) en in ethanol was used to make a...
Homework Answers
Since we have a 25% v/v solution of en in ethanol, and we use 3 ml of solution; the volume of pure en in this solution would be:
25/100 * 3 = 0.75 ml
The weight of this 0.75 ml of en would be: volume * density = 0.75 * 0.899 g = 0.674 g
Moles of en = weight / molar mass = 0.674 / 60.1 = 0.0112 moles
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In a synthesis experiment 3mL of 25% (v/v) en in ethanol was used
to make a...
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In a synthesis of a complex Nickel salt 0.639g of NiSO4.6H2O where weighed out and used. Calculate the mol of NiSO4.6H2O and report the number to 4 decimals.
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20.5 mL of mouthwash was used in the distillation experiment, The volume ethanol in the distillate...
20.5 mL of mouthwash was used in the distillation experiment, The volume ethanol in the distillate determined is 5.36 mL. The volume percent of ethanol in mouthwash is 96. Round your answer to the correct number of significant digits. Use the equation below to calculate the volume percent of ethanol in mouthwash Volume % of ethanol in mouthwash-volume of ethanol in the distillate/volume of mouthwash) X 100%
Question 15 1 pts A bottle of cold medicine contains 25% (v/v) ethyl alcohol (ethanol) in...
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5. For today's experiment, you will be performing the first step of your multistep synthesis to...
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Show Calculation of % ethanol in each tube below. A. Preparation of Standards (4.5pt) # %(v/v)...
Show Calculation of % ethanol in each tube below.
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The following data was collected after running a calorimetric experiment using three salts. The data collected...
The following data was collected after running a calorimetric
experiment using three salts.
The data collected for each experiment is as follows.
Experiment 1: 2.53 g of unknown salt added to 160. mL of water
resulted in a ΔT value of −0.1°C.
Experiment 2: 2.53 g of unknown salt added to 160. mL of water
resulted in a ΔT value of 0.7°C.
Experiment 3: 2.53 g of unknown salt added to 160. mL of water
resulted in a ΔT value...
The spectrochemical series is < Br<< Cl<F-<OH" <H2O <NH3 <en <NO2- < CN- The complex [Ni(Cl)c]...
The spectrochemical series is < Br<< Cl<F-<OH" <H2O <NH3 <en <NO2- < CN- The complex [Ni(Cl)c] is green and the complex [Ni(en)]2+ is violet, where en corresponds to the ethylenediamine ligand. The reason for the difference in the color of these complexes is: Select one: A. The chloride ligand is green, and the ethylenediamine ligand is violet. B. The difference in the coordination numbers of the chloride complex and the en complex. C. The difference in the oxidation states of...
# 2 only not 4 of water In another experiment, a student dissolved 78.35 g FeCl3-6...
# 2 only not 4
of water In another experiment, a student dissolved 78.35 g FeCl3-6 H2O in 75.80 g water and reported the density of the solution to be 1.098 g/mL. SHOW WORK to calculate for this solution the per cent salt. (Note this solute is part salt and part water of hydration.) molarity molality Experiment 2: Solubility Report Sheet Name and formula of salt used: _K6102 Mass of salt used:_3.53 Volume of solution at 40.0°C:_45.0 Mass of salt...
20.5 mL of mouthwash was used in the distillation experiment, The volume ethanol in the distillate determined is 5.36 mL. The volume percent of ethanol in mouthwash is 96. Round your answer to the correct number of significant digits. Use the equation below to calculate the volume percent of ethanol in mouthwash Volume % of ethanol in mouthwash-volume of ethanol in the distillate/volume of mouthwash) X 100%
Question 15 1 pts A bottle of cold medicine contains 25% (v/v) ethyl alcohol (ethanol) in water. . In 125 mL of medicine, how much ethyl alcohol is there (in mL)? Ethyl alcohol is C2H60 and has a density of 0.789 g/mL. What is the molarity of the solution? . Question 16 1 pts If you make a solution by using 45 g glucose (C6H12O) and add enough water to make 250.mL of solution: . What is the % (m/v)...
5. For today's experiment, you will be performing the first step of your multistep synthesis to make trans- 1,2-cyclohexanol from hexanol. You will be using distillation to separate the product of the first step in the synthesis. (see the procedure below for diagrams and photos of what distillation setup looks like. Check the boiling points provided in the chemical table for starting material and product. Which compound boils at a lower boiling point? Explain briefly based on boiling point differences...
Show Calculation of % ethanol in each tube below.
A. Preparation of Standards (4.5pt) # %(v/v) Tube Ethanol Observations after heating Oil. turned light orange. LOL turned light orange 2.04. turned burnt orange 3.0% turned dark Yellow green 4.01. turned light green 5.01. turned dark blue igreen 6.07 turned light blue 7.01 turned light blue 8.07. turned light blue Show calculation of %(v/v) ethanol in each tube below (2.25pt): PROCEDURE: NOTES: Follow all standard safety precautions. Discard all waste into...
The following data was collected after running a calorimetric
experiment using three salts.
The data collected for each experiment is as follows.
Experiment 1: 2.53 g of unknown salt added to 160. mL of water
resulted in a ΔT value of −0.1°C.
Experiment 2: 2.53 g of unknown salt added to 160. mL of water
resulted in a ΔT value of 0.7°C.
Experiment 3: 2.53 g of unknown salt added to 160. mL of water
resulted in a ΔT value...
The spectrochemical series is < Br<< Cl<F-<OH" <H2O <NH3 <en <NO2- < CN- The complex [Ni(Cl)c] is green and the complex [Ni(en)]2+ is violet, where en corresponds to the ethylenediamine ligand. The reason for the difference in the color of these complexes is: Select one: A. The chloride ligand is green, and the ethylenediamine ligand is violet. B. The difference in the coordination numbers of the chloride complex and the en complex. C. The difference in the oxidation states of...
# 2 only not 4
of water In another experiment, a student dissolved 78.35 g FeCl3-6 H2O in 75.80 g water and reported the density of the solution to be 1.098 g/mL. SHOW WORK to calculate for this solution the per cent salt. (Note this solute is part salt and part water of hydration.) molarity molality Experiment 2: Solubility Report Sheet Name and formula of salt used: _K6102 Mass of salt used:_3.53 Volume of solution at 40.0°C:_45.0 Mass of salt...
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