True or false? Explain your answer in detail for full credit. The mixture of equi 0.2M...
True or false? Explain your answer in detail for full credit.
The mixture of equi 0.2M solution of sodium acetate and acetic acid has lower buffer capacity than the mixture of equi 0.5M NaCl and HCl.
Homework Answers
This statement is false, since NaCl + HCl doesn't make up a buffer solution. Hence it does not have a buffer capacity.
But instead, if a buffer solution was given, buffer capacity is directly proportional to the concentration of buffer.
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True or false? Explain your answer in detail for full
credit.
The mixture of equi 0.2M...
Answer by true or false - if false correct the statement. ( 7-) The mixture of...
Answer by true or false - if
false correct the statement.
( 7-) The mixture of equi 0.2M solution of sodium acetate and acetic acid has lower buffer capacity than the mixture of equi 0.5M NaCl and HCI. 8- Electron pair donor) is the definition of Lewis acid. false= acceptor if acid donor if base (9-) Ka of NH4OH is 5.376x10-10. (10- pH for 0.1 M Acetic acid ( Ka = 1.8 x10 -S) is 1.73.
a)Calculate the change in pH that occurs when 0.00100 mol of gaseous HCl is added to...
a)Calculate the change in pH that occurs when 0.00100 mol of gaseous HCl is added to a buffer solution that is prepared by dissolving 4.92g of sodium acetate(molar mass = 82.03gmol^-1) in 250 ml of 0.150 mol L^-1 of acetic acid solution? Assume no change in volume upon addition of either the sodium acetate or HCl. (Ka for acetic acid = 1.8*10^-5) b)Calculate the change in pH that occurs when 0.00100 mol of gaseous HCl is added to a buffer...
Answer all three please. The two following choices for the bottom one are:1. solutions containing only...
Answer all three please. The two following choices for the bottom
one are:1. solutions containing only 10mM acetic acid or acetate
cannot serve as buffers 2. The 10mM acetic acid solution acetic
acid is a weak acid
End of Chapter, Problem 62 Which would be a more effective buffer at pH 5.0 (see Table 2.4)? 10 mM acetic acid buffer or 10 mM HEPES buffer The 10 mM HEPES buffer because its pK is higher than the desired pH. The...
1. A solution has [HC7H5O2] = 0.100 M and [Ca(C7H5O2)2] = 0.200 M. Ka = 6.3...
1. A solution has [HC7H5O2] = 0.100 M and [Ca(C7H5O2)2] = 0.200 M. Ka = 6.3 × 10-5 for HC7H5O2. The solution volume is 5.00 L. What is the pH of this solution after 5.00 mL 10.0 M HCl is added? 2. Which of the following solution(s) is a buffer? 100 mL of 0.1 M acetic acid mixed with 25 mL of 0.5 M NaOH 50 mL of 0.1 M acetic acid mixed with 25 mL of 0.05 M sodium...
4. True/False. You must explain your answers to get full credit a. An instrument is a good soluti...
4. True/False. You must explain your answers to get full credit a. An instrument is a good solution for estimation when a researcher lacks data on X. b. If a researcher has two individually valid instruments for the same endogenous regressor, his estimator will be inconsistent
4. True/False. You must explain your answers to get full credit a. An instrument is a good solution for estimation when a researcher lacks data on X. b. If a researcher has two individually...
1. Without doing any math, which solution has a lower pH: (a) 0.05 M acetic acid,...
1. Without doing any math, which solution has a lower pH: (a) 0.05 M acetic acid, or (b) a buffer prepared from 0.05 acetic acid and 0.05 M sodium acetate. Explain your answer. 2. Without doing any math, which solution has a lower pH: (a) 0.05 M acetic acid that has been titrated to its endpoint using NaOH, or (b) a buffer prepared from 0.05 acetic acid and 0.05 M sodium acetate. Explain your answer. 3. What pH did you...
f. The units for buffer capacity are a mol " L x pH unit (True False)...
f. The units for buffer capacity are a mol " L x pH unit (True False) Falas g. The theoretical pH of a buffer containing 3.75 mmol of acetic acid and 1.25 mmol of sodium acetate is equal to the pKa of acetic acid. (True False) h. In the reaction, H2O2 (aq) +21+ (aq) + 2H30* (aq) → 4H2O(l) +12(aq), oxygen is reduced and iodide is oxidized. (True False) i. Cu2+ is the strongest oxidant out of the following three...
Lab 5: Buffers Data analysis 1. Write reaction equations to explain how your acetic acid- acetate...
Lab 5: Buffers Data analysis 1. Write reaction equations to explain how your acetic acid- acetate buffer reacts with an acid and with a base, respectively. 2. Buffer capacity has a rather loose definition, yet it is an important property of buffers. A commonly seen definition of buffer capacity is: "The amount of Hor OH that can be neutralized before the pH changes by one unit." Use your data to determine the buffer capacity of Buffer A and Buffer B....
7.Calculate the amounts of the required chemicals for preparing the following acetic acid/acetate buffer solution and its pH values. Please give detail steps of your calculation and use proper signif...
7.Calculate the amounts of the required chemicals for preparing the following acetic acid/acetate buffer solution and its pH values. Please give detail steps of your calculation and use proper significant numbers. No points will be given if only answers are given without detail and reasonable calculations (subtotal 15 pts): A. In the first step, if you are required to prepare a 2.00M sodium acetate in 200.0 mL distilled water, how many grams of sodium acetate should be added in 200...
PRE-LABORATORY QUESTIONS Fully answer these questions in your laboratory notebook before coming to lab. Show all...
PRE-LABORATORY QUESTIONS Fully answer these questions in your laboratory notebook before coming to lab. Show all work for numerical calculations. 1. Write out the chemical equation and equilibrium constant expression (Law of Mass Action) for the acetic acid / acetate ion buffer system. Derive the Henderson-Hasselbach equation for this system. 2. Calculate the pH of a buffer solution made by adding 1.3230 g of sodium acetate trihydrate (NaC,H,O, 3H,O) to 50.00 mL of 0.1652 M acetic acid. Assume there is...
Answer by true or false - if
false correct the statement.
( 7-) The mixture of equi 0.2M solution of sodium acetate and acetic acid has lower buffer capacity than the mixture of equi 0.5M NaCl and HCI. 8- Electron pair donor) is the definition of Lewis acid. false= acceptor if acid donor if base (9-) Ka of NH4OH is 5.376x10-10. (10- pH for 0.1 M Acetic acid ( Ka = 1.8 x10 -S) is 1.73.
Answer all three please. The two following choices for the bottom
one are:1. solutions containing only 10mM acetic acid or acetate
cannot serve as buffers 2. The 10mM acetic acid solution acetic
acid is a weak acid
End of Chapter, Problem 62 Which would be a more effective buffer at pH 5.0 (see Table 2.4)? 10 mM acetic acid buffer or 10 mM HEPES buffer The 10 mM HEPES buffer because its pK is higher than the desired pH. The...
4. True/False. You must explain your answers to get full credit a. An instrument is a good solution for estimation when a researcher lacks data on X. b. If a researcher has two individually valid instruments for the same endogenous regressor, his estimator will be inconsistent
4. True/False. You must explain your answers to get full credit a. An instrument is a good solution for estimation when a researcher lacks data on X. b. If a researcher has two individually...
1. Without doing any math, which solution has a lower pH: (a) 0.05 M acetic acid, or (b) a buffer prepared from 0.05 acetic acid and 0.05 M sodium acetate. Explain your answer. 2. Without doing any math, which solution has a lower pH: (a) 0.05 M acetic acid that has been titrated to its endpoint using NaOH, or (b) a buffer prepared from 0.05 acetic acid and 0.05 M sodium acetate. Explain your answer. 3. What pH did you...
f. The units for buffer capacity are a mol " L x pH unit (True False) Falas g. The theoretical pH of a buffer containing 3.75 mmol of acetic acid and 1.25 mmol of sodium acetate is equal to the pKa of acetic acid. (True False) h. In the reaction, H2O2 (aq) +21+ (aq) + 2H30* (aq) → 4H2O(l) +12(aq), oxygen is reduced and iodide is oxidized. (True False) i. Cu2+ is the strongest oxidant out of the following three...
Lab 5: Buffers Data analysis 1. Write reaction equations to explain how your acetic acid- acetate buffer reacts with an acid and with a base, respectively. 2. Buffer capacity has a rather loose definition, yet it is an important property of buffers. A commonly seen definition of buffer capacity is: "The amount of Hor OH that can be neutralized before the pH changes by one unit." Use your data to determine the buffer capacity of Buffer A and Buffer B....
7.Calculate the amounts of the required chemicals for preparing the following acetic acid/acetate buffer solution and its pH values. Please give detail steps of your calculation and use proper significant numbers. No points will be given if only answers are given without detail and reasonable calculations (subtotal 15 pts): A. In the first step, if you are required to prepare a 2.00M sodium acetate in 200.0 mL distilled water, how many grams of sodium acetate should be added in 200...
PRE-LABORATORY QUESTIONS Fully answer these questions in your laboratory notebook before coming to lab. Show all work for numerical calculations. 1. Write out the chemical equation and equilibrium constant expression (Law of Mass Action) for the acetic acid / acetate ion buffer system. Derive the Henderson-Hasselbach equation for this system. 2. Calculate the pH of a buffer solution made by adding 1.3230 g of sodium acetate trihydrate (NaC,H,O, 3H,O) to 50.00 mL of 0.1652 M acetic acid. Assume there is...
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