Let's say that you need to prepare a 66.8 % (v/v) solution of ethyl acetate (C4H8O2)...
Homework Answers
Add Answer to:
Let's say that you need to prepare a
66.8 %
(v/v)
solution of
ethyl acetate (C4H8O2)...
1) When you measured out one mL of the trans-1,2-dibenzoylethylene in ethyl acetate solution it had...
1) When you measured out one mL of the trans-1,2-dibenzoylethylene in ethyl acetate solution it had a mass of 0.890 grams. (0.050 g of yellow solid and rest of it is Ethyl acetate). The forerun of ethyl acetate had a mass of 0.075g and the rest of the ethyl acetate collected had a mass of 0.253 g. The trans-1,2-dibenzoylethylene had a mass of 0.046 g. What is the percent recovery of each of the materials?
You need to prepare 900 mL of a 0.25 M acetate buffer solution with a pH...
You need to prepare 900 mL of a 0.25 M acetate buffer solution with a pH of 4.3 a. Determine the concentration of both the acetate (conjugate base) and acetic acid (weak acid) in this solution. b. If you made the solution above using solid sodium acetate and liquid acetic acid, what mass of sodium acetate is required and what volume of glacial acetic acid is required?
Given the partition coefficient between ethyl acetate and water for Compound A is 7.0, 1. what...
Given the partition coefficient between ethyl acetate and water for Compound A is 7.0, 1. what mass of A, to the tenths place, would be extracted from a 50 mL solution of water containing 9.0 g of A using 25 mL ethyl acetate? (2 pt)
Question 15 1 pts A bottle of cold medicine contains 25% (v/v) ethyl alcohol (ethanol) in...
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)...
In an experiment where you added 25 mL of a 3 M NaOH solution into a...
In an experiment where you added 25 mL of a 3 M NaOH solution into a separatory funnel containing a mixture of benzoic acid, toluene, and aniline dissolved in 25 mL of ethyl acetate, what would be in the top layer of the separatory funnel? In an experiment where you added 25 mL of a 3M HCl solution into a separatory funnel containing a mixture of benzoic acid, toluene, and aniline dissolved in 25 mL of ethyl acetate, what would...
5. You are asked to prepare an acetate buffer solution at pH 4.6. Use the Henderson-Hasselbalch...
5. You are asked to prepare an acetate buffer solution at pH 4.6. Use the Henderson-Hasselbalch equation to calculate the ratio of sodium acetate and acetic acid required to prepare a buffer at pH 4.6. 6. If you had 500mL of 0.200M sodium acetate buffer pH4.76, how many mL of 1.00M HCI would you need to add to adjust the pH to 4.60?
You need to prepare 200 mL of a 0.4 M solution of ammonium hydroxide (NH4OH) You...
You need to prepare 200 mL of a 0.4 M solution of ammonium hydroxide (NH4OH) You have 80 mL of a 0.5 M NHOH solution and 40 mL of a 7.5% (w/v) NH4OH solution. What volume of 7.5% NHOH and water needs to be added to the 80 mL of 0.5 M NH4OH solution to make up 200 mL of 0.4 M NH4OH? Molar mass of NH4OH 35.04 g/mol % (weight / volume) means mass (in g) in volume (100...
You need to prepare an acetate buffer of pH 6.29 from a 0.704 M acetic acid...
You need to prepare an acetate buffer of pH 6.29 from a 0.704 M
acetic acid solution and a 2.48 M KOH solution. If you have 575 mL
of the acetic acid solution, how many milliliters of the KOH
solution do you need to add to make a buffer of pH 6.29? The pKa of
acetic acid is 4.76.
You need to prepare an acetate buffer of pH 6.29 from a 0.704 M acetic acid solution and a 2.48 M...
You need to measure out 2.50 grams of ethyl alcohol. Because it is a liquid, you...
You need to measure out 2.50 grams of ethyl alcohol. Because it is a liquid, you decide that it would be easier to get that mass value by measuring the sample by volume. If ethyl alcohol has a density of 0.789 g/mL, what volume of the liquid would you need? Show your calculations. 2. Should density be considered a value that is exact by definition? Explain your answer. 3. You made some preliminary calculations for an object that you want...
A solution of methyl acetate (C3H60 2) and water that is 25.% methyl acetate by mass...
A solution of methyl acetate (C3H60 2) and water that is 25.% methyl acetate by mass is boiling at 94.7 °C. The vapor is collected and cooled until it condenses to form a new solution. Calculate the percent by mass of methyl acetate in the new solution. Here's some data you may need: normal boiling point density vapor pressure at 94.7 °C methyl acetate 57. °C 0.93 mL 2360. torr water 100. °C 1.00 mL 630. torr Be sure your...
Given the partition coefficient between ethyl acetate and water for Compound A is 7.0, 1. what mass of A, to the tenths place, would be extracted from a 50 mL solution of water containing 9.0 g of A using 25 mL ethyl acetate? (2 pt)
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. You are asked to prepare an acetate buffer solution at pH 4.6. Use the Henderson-Hasselbalch equation to calculate the ratio of sodium acetate and acetic acid required to prepare a buffer at pH 4.6. 6. If you had 500mL of 0.200M sodium acetate buffer pH4.76, how many mL of 1.00M HCI would you need to add to adjust the pH to 4.60?
You need to prepare 200 mL of a 0.4 M solution of ammonium hydroxide (NH4OH) You have 80 mL of a 0.5 M NHOH solution and 40 mL of a 7.5% (w/v) NH4OH solution. What volume of 7.5% NHOH and water needs to be added to the 80 mL of 0.5 M NH4OH solution to make up 200 mL of 0.4 M NH4OH? Molar mass of NH4OH 35.04 g/mol % (weight / volume) means mass (in g) in volume (100...
You need to prepare an acetate buffer of pH 6.29 from a 0.704 M
acetic acid solution and a 2.48 M KOH solution. If you have 575 mL
of the acetic acid solution, how many milliliters of the KOH
solution do you need to add to make a buffer of pH 6.29? The pKa of
acetic acid is 4.76.
You need to prepare an acetate buffer of pH 6.29 from a 0.704 M acetic acid solution and a 2.48 M...
A solution of methyl acetate (C3H60 2) and water that is 25.% methyl acetate by mass is boiling at 94.7 °C. The vapor is collected and cooled until it condenses to form a new solution. Calculate the percent by mass of methyl acetate in the new solution. Here's some data you may need: normal boiling point density vapor pressure at 94.7 °C methyl acetate 57. °C 0.93 mL 2360. torr water 100. °C 1.00 mL 630. torr Be sure your...
Most questions answered within 3 hours.
-
Write a brief response, 30-90-words, for each question below. 1.
In your own words, define “Auditing.”...
asked 1 minute ago -
Water flows through a 8-foot wide and 4-foot tall rectangular
channel. If the desired flow rate...
asked 9 minutes ago -
A 0.100-kg, 59.6-cm-long uniform bar has a small 0.070-kg mass
glued to its left end and...
asked 4 minutes ago -
Do you believe that some things that fall into the category of
“pseudoscience” are worth believing...
asked 12 minutes ago -
Cruz Video Center accumulates the following cost and net
realizable data at December 31.
Cameras $14,700...
asked 13 minutes ago -
Direct Labor Variances
The following data relate to labor cost for production of 4,600
cellular telephones:...
asked 18 minutes ago -
1. Describe the differences between management in the nonprofit
sector and management in other sectors. How...
asked 19 minutes ago -
Identify the location of the following corresponding operand if
the address field in an instruction contains...
asked 20 minutes ago -
A new battery's voltage may be acceptable (A) or unacceptable
(U). A certain flashlight requires two...
asked 23 minutes ago -
Water has significant IMF, which result in many of its unique
properties—high boiling point relative to...
asked 42 minutes ago -
I need help with an executive summary for Adidas Items to be
included are a discription...
asked 35 minutes ago -
19. Most progressive reform activists were white
and a. upper class. b. lower class. c. wokring...
asked 37 minutes ago