Homework Answers
Add Answer to:
i belive we ade trying to figure out how many mL of each of
the solutions...
1) Calculate the pH of the 1L buffer composed of 500 mL of 0.60 M acetic...
1) Calculate the pH of the 1L buffer composed of 500 mL of 0.60 M acetic acid plus 500 mL of 0.60 M sodium acetate, after 0.010 mol of HCl is added (Ka HC2H3O2 = 1.75 x 10-5). Report your answer to the hundredths place. 2) Calculate the pH of the 1L buffer composed of 500 mL 0.60 M acetic acid plus 500 mL of 0.60 M sodium acetate, after 0.010 mol of NaOH is added (Ka HC2H3O2 = 1.75...
i know the answer but i dont know how to get it 10. How many milliliters...
i know the answer but i dont know how to get it
10. How many milliliters of 10.0 M HNO3 solution must be added to a LOL buffer system that is 0.001 M acetic acid (HC2H302) and 0.1 M sodium acetate (NaC2H302) to bring the pH to 5.452 The pka of acetic acid is 4.75 a. 1.58 ml d. 2.99 mL b. 3.92 mL e. It is impossible to tell from the given information c. 25.00 mL
Lab 5 Buffers 1. Dissolved ions in salt solutions can act as acids or bases and...
Lab 5 Buffers 1. Dissolved ions in salt solutions can act as acids or bases and react with water to produce hydronium ions or hydroxide ions that contribute to the pH of the salt solution. Since strong acids and strong bases completely ionize in solution, the reverse reaction essentially does not occur, meaning that the resulting conjugate base of a strong acid or conjugate acid of a strong base do NOT act as acids or bases. Ions that are conjugate...
Each group of students should prepare 100 mL of ONE of the following PAIRS of buffers...
Each group of students should prepare 100 mL of ONE of the following PAIRS of buffers 2. Phosphate buffer a. 100 mM potassium-phosphate, pH 5.0 b. 100 mM potassium-phosphate, pH 7.0 To prepare 100 mL of 100 mM phosphate buffers by titrating the monobasic form with base, first calculate how much KH2PO4 you need. Dissolve this amount in 50 mL of water. Using the Henderson-Hasselbalch equation, calculate how much 1 M NaOH should be required to achieve the desired pH...
DATE: NAME: NAME: SECTION/GROUP: NAME: NAME LAB 11: PRE-LAB HOW DOES THE BUFFER CAPACITY DEPEND ON...
DATE: NAME: NAME: SECTION/GROUP: NAME: NAME LAB 11: PRE-LAB HOW DOES THE BUFFER CAPACITY DEPEND ON THE COMPOSITION OF A BUFFER MIXTURE?, 1. Use 10-mL Mohr pipettes to prepare the solutions described in the Data Table below and measure their initial pH using a pH electrode. Make sure the electrode bulb is fully immersed before measuring. Add 1.0 mL of 0.10 M NaOH to each solution and measure the pH again. Calculate the pH change caused by the addition of...
need help with 42 & 44 I am trying to figure out how to make a...
need help with 42 & 44
I
am trying to figure out how to make a desired buffer
42. What volumes of 0.50 M HNO2 and 0.50 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.55? 43. Consider a solution that contains both C5H5N and C5H5NHNO3. Calculate the ratio (C3H5N]/[C3H5NH+] if the solution has the following pH values: a. pH = 4.50 c. pH = 5.23 l g de to b. pH...
How would you prepare 50.0 mL of a NaChi0Na CHO. buffer with pH-635 (give spec each...
How would you prepare 50.0 mL of a NaChi0Na CHO. buffer with pH-635 (give spec each component)? Assume that you want the total buffer concentration (Le, [weak acid]+ [conjugate ific masses of base]) 6、 a. to be 0.100 M. Review Example 16.4 on p. 72 in the Chang textbook. Make sure to select the sppropriate K- value for this buffer system. Show your work below. Maleic Acid: p-1.90 p-6.30 pk.--log K) [weak acid]+[conjugate base]- 0.100 M pH- pKa + MW...
I’m trying to figure out how much of each i need to use to prepare the...
I’m trying to figure out how much of each i need to use to prepare
the stock buffer
CLIVILY DZ VEEN Tasks: prepare stock substrate in appropriate buffer o 10 mL 10 mM L-DOPA in 100 mM phosphate buffer, pH 6.0
Given: pH: 7.60 Concentration (M): 0.050 mL: 100mL Determine the Mass of Each Component Recall that...
Given: pH: 7.60 Concentration (M): 0.050 mL: 100mL Determine the Mass of Each Component Recall that buffers are formed from conjugate acid/base pairs. Using the information given about your assigned buffer, determine how much of each component (acid and base) you will need in order to prepare it in the lab. (This will require a system of equations because there are two “unknowns.”) Note: the conjugate acid, in this case, is H2PO4−, and the conjugate base is HPO42−. Equations 1...
I added everything thing. this is the lab question you need to solve. First assigned buffer...
I added everything thing.
this is the lab question you need to solve.
First assigned buffer pH: 2.031 Second assigned buffer pH: 9.171 Available Buffer Systems (acid/ base) pka of Conjugate Acid 2.847 4.757 malonic acid/ monosodium malonate acetic acid/ sodium acetate ammonium chloride/ ammonia triethylammonium chloride/ triethylamine 9.244 10.715 1) Buffer system details: Given pH Name and volume conjugate acid Name and volume conjugate base 2) Calculations for preparation of high capacity buffer system. Introduction In this experiment, you...
i know the answer but i dont know how to get it
10. How many milliliters of 10.0 M HNO3 solution must be added to a LOL buffer system that is 0.001 M acetic acid (HC2H302) and 0.1 M sodium acetate (NaC2H302) to bring the pH to 5.452 The pka of acetic acid is 4.75 a. 1.58 ml d. 2.99 mL b. 3.92 mL e. It is impossible to tell from the given information c. 25.00 mL
DATE: NAME: NAME: SECTION/GROUP: NAME: NAME LAB 11: PRE-LAB HOW DOES THE BUFFER CAPACITY DEPEND ON THE COMPOSITION OF A BUFFER MIXTURE?, 1. Use 10-mL Mohr pipettes to prepare the solutions described in the Data Table below and measure their initial pH using a pH electrode. Make sure the electrode bulb is fully immersed before measuring. Add 1.0 mL of 0.10 M NaOH to each solution and measure the pH again. Calculate the pH change caused by the addition of...
need help with 42 & 44
I
am trying to figure out how to make a desired buffer
42. What volumes of 0.50 M HNO2 and 0.50 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.55? 43. Consider a solution that contains both C5H5N and C5H5NHNO3. Calculate the ratio (C3H5N]/[C3H5NH+] if the solution has the following pH values: a. pH = 4.50 c. pH = 5.23 l g de to b. pH...
How would you prepare 50.0 mL of a NaChi0Na CHO. buffer with pH-635 (give spec each component)? Assume that you want the total buffer concentration (Le, [weak acid]+ [conjugate ific masses of base]) 6、 a. to be 0.100 M. Review Example 16.4 on p. 72 in the Chang textbook. Make sure to select the sppropriate K- value for this buffer system. Show your work below. Maleic Acid: p-1.90 p-6.30 pk.--log K) [weak acid]+[conjugate base]- 0.100 M pH- pKa + MW...
I’m trying to figure out how much of each i need to use to prepare
the stock buffer
CLIVILY DZ VEEN Tasks: prepare stock substrate in appropriate buffer o 10 mL 10 mM L-DOPA in 100 mM phosphate buffer, pH 6.0
I added everything thing.
this is the lab question you need to solve.
First assigned buffer pH: 2.031 Second assigned buffer pH: 9.171 Available Buffer Systems (acid/ base) pka of Conjugate Acid 2.847 4.757 malonic acid/ monosodium malonate acetic acid/ sodium acetate ammonium chloride/ ammonia triethylammonium chloride/ triethylamine 9.244 10.715 1) Buffer system details: Given pH Name and volume conjugate acid Name and volume conjugate base 2) Calculations for preparation of high capacity buffer system. Introduction In this experiment, you...
Most questions answered within 3 hours.
-
Q4. Company director dies of brain hemorrhage after heading a
football. David Belk, 50, of Macclesfield,...
asked 1 hour ago -
If this 2.0 ppm dilution is still measurable, the detection
limit for STD-B is less than...
asked 1 hour ago -
Calculate the ideal banking angle in degrees for a gentle turn of
1.8 km radius on...
asked 1 hour ago -
From these three classification approaches (decision trees,
Naïve Bayes and neural networks), both with their own...
asked 1 hour ago -
A soda dispenser can be adjusted to deliver any fixed number of
ounces of soft drink....
asked 1 hour ago -
A hockey puck (1) of mass 160 g is shot east at a speed of 6.60...
asked 1 hour ago -
Segregation of duties reduces the opportunities for a person to
be in a position to do...
asked 1 hour ago -
Can an organism use both oxidative phosphorylation and substrate
level phosphorylation? If so, what are some...
asked 1 hour ago -
The masses and coordinates of three spheres are as follows:
12 kg, x = 0.50 m,...
asked 1 hour ago -
Problem 1: A cell generates a traction force of 2×〖10〗^4
μ"dynes" and travels at a speed...
asked 1 hour ago -
How can a company with future income of 152 billion but 4.5
billion in debt overcome...
asked 1 hour ago -
Ryman Healthcare stock is trading at $13. Every six months, they
pay a 15 cent dividend....
asked 2 hours ago