The cytoplasm of most cells is buffered by the combination of bicarbonate (HCO3-, the weak acid)...
The cytoplasm of most cells is buffered by the combination of bicarbonate (HCO3-, the weak acid) and carbonate (CO32-, the conjugate base) ions that buffer the cell at a pH of around 7.8. Would you expect the presence of other ions that are normally present in the cell (other than H+) have any effect on the ability of carbonate and bicarbonate ions to buffer the cell? Explain your answer.
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The cytoplasm of most cells is buffered by the combination of
bicarbonate (HCO3-, the weak acid)...
Bicarbonate (HCO3-) is a common water quality constituent. Bicarbonate dissociates as a weak acid to give...
Bicarbonate (HCO3-) is a common water quality constituent. Bicarbonate dissociates as a weak acid to give carbonate (CO32-) as follows: HCO3- = CO32- + H+ pKa = 10.33 Determine whether HCO3-, or CO32-, is predominant in natural waters at pH = 7.90. I got (HCO_3)^- ; I would just like to double check!
Design a buffer that has a pH of 4.77 using one of the weak acid/conjugate base...
Design a buffer that has a pH of 4.77 using one
of the weak acid/conjugate base systems shown below.
Weak Acid
Conjugate Base
Ka
pKa
HC2O4-
C2O42-
6.4×10-5
4.19
H2PO4-
HPO42-
6.2×10-8
7.21
HCO3-
CO32-
4.8×10-11
10.32
How many grams of the potassium salt of the
weak acid must be combined with how many grams of the
potassium salt of its conjugate base, to produce
1.00 L of a buffer that is 1.00 M
in the weak base?
grams potassium...
Design a buffer that has a pH of 4.45 using one of the weak base/conjugate acid...
Design a buffer that has a pH of 4.45 using one of the weak base/conjugate acid systems shown below. Weak Base Kb Conjugate Acid Ka pKa CH3NH2 4.2×10-4 CH3NH3+ 2.4×10-11 10.62 C6H15O3N 5.9×10-7 C6H15O3NH+ 1.7×10-8 7.77 C5H5N 1.5×10-9 C5H5NH+ 6.7×10-6 5.17 How many grams of the chloride salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base? grams chloride...
Acid precipitation can harm living organisms in rivers and streams, but some rivers are more vulnerable...
Acid precipitation can harm living organisms in rivers and streams, but some rivers are more vulnerable than others. Streams in the Adirondack Mountains, for example, were quickly acidified by acid precipitation in the 1970s and 80s, kiling local trout populations. But rivers that ran through a bed of limestone (calcium carbonate), like the Clark Fork River in Montana, were less affected. Part 8 of 10 What can explain the relative lack of effect of acid precipitation on the Clark Fork...
QUESTION 9 12 points Save if a small amount of an acid or base is added...
QUESTION 9 12 points Save if a small amount of an acid or base is added to a buffer solution, the pH value of this solution will exhibit small changes. A buffer solution is produced when similar amounts of a weak + acid and its weak conjugate base are in equilibrium If the ratio between both components in a buffer solution is 1:1, the pH value of the buffer solution will be equal to the pka -value of the acid...
21. What are the characteristics of the carbonic acid-bicarbonate buffer system (select all that apply? a...
21. What are the characteristics of the carbonic acid-bicarbonate buffer system (select all that apply? a CO2 is eliminated by the lungs b. Neutralizes HCl acid to yield carbonic acid and salt c. H2CO3 formed by neutralization dissociates into H2O and CO2 d. Shifts H+ in and out of cell in exchange for other cations such as potassium and sodium e. Free basic radicals dissociate into ammonia and OH-, which combines with Ho to form water 22. What are characteristics...
The question is Did the combination of carbonic acid and bicarbonate function as a buffer? Support...
The question is Did the combination of carbonic acid and bicarbonate function as a buffer? Support your response with data. Buffers are chemical mixtures that resist pH change when exposed to acids or bases. They contain both a weak proton donor and weak proton acceptor. The former neutralizes any strong bases added and the latter neutralizes any strong acids added to the buffer. Our bodies rely upon a combination of three different buffers to maintain stable pH: the bicarbonate buffer...
is a solution that resists changes in pH when a small amount of acid or base...
is a solution that resists changes in pH when a small amount of acid or base is added to best buffer solutions are prepared from weak acids and their conjugate base added as a sodium of potassium salt. Most biological systems must maintain a very narrow range of pH; therefore, buffers allow the biological solution to function correctly. Blood is a good example of a biological system that must maintain a pH in a very narrow range from 7.3 to...
please help l, will rate! thabk you!! Why does a solution of a weak acid and...
please help l, will rate! thabk you!!
Why does a solution of a weak acid and its conjugate base act as a better buffer than does a solution of the weak acid alone? The presence of both the acid and the base provides a significant concentration of both an acid and a base, making it harder to change the pH A solution of a weak acid alone has no base present to absorb added acid. The presence of both the...
A buffer solution is able to maintain a constant pH when small amounts of acid or...
A buffer solution is able to maintain a constant pH when small amounts of acid or base are added to the buffer. Consider what happens when 1 mL of a 5 M solution is added or 0.005 mol of HCl are added to a 100.0 mL solution acetic acid buffer that contains 0.0100 mol of Acetic acid, HC,H,O,, and 0.0100 mol of sodium acetate, NaC,H,O,. The initial concentration of both the acid and the base are 0.0100 mol/ 0.1000 L...
Design a buffer that has a pH of 4.77 using one
of the weak acid/conjugate base systems shown below.
Weak Acid
Conjugate Base
Ka
pKa
HC2O4-
C2O42-
6.4×10-5
4.19
H2PO4-
HPO42-
6.2×10-8
7.21
HCO3-
CO32-
4.8×10-11
10.32
How many grams of the potassium salt of the
weak acid must be combined with how many grams of the
potassium salt of its conjugate base, to produce
1.00 L of a buffer that is 1.00 M
in the weak base?
grams potassium...
Acid precipitation can harm living organisms in rivers and streams, but some rivers are more vulnerable than others. Streams in the Adirondack Mountains, for example, were quickly acidified by acid precipitation in the 1970s and 80s, kiling local trout populations. But rivers that ran through a bed of limestone (calcium carbonate), like the Clark Fork River in Montana, were less affected. Part 8 of 10 What can explain the relative lack of effect of acid precipitation on the Clark Fork...
QUESTION 9 12 points Save if a small amount of an acid or base is added to a buffer solution, the pH value of this solution will exhibit small changes. A buffer solution is produced when similar amounts of a weak + acid and its weak conjugate base are in equilibrium If the ratio between both components in a buffer solution is 1:1, the pH value of the buffer solution will be equal to the pka -value of the acid...
21. What are the characteristics of the carbonic acid-bicarbonate buffer system (select all that apply? a CO2 is eliminated by the lungs b. Neutralizes HCl acid to yield carbonic acid and salt c. H2CO3 formed by neutralization dissociates into H2O and CO2 d. Shifts H+ in and out of cell in exchange for other cations such as potassium and sodium e. Free basic radicals dissociate into ammonia and OH-, which combines with Ho to form water 22. What are characteristics...
is a solution that resists changes in pH when a small amount of acid or base is added to best buffer solutions are prepared from weak acids and their conjugate base added as a sodium of potassium salt. Most biological systems must maintain a very narrow range of pH; therefore, buffers allow the biological solution to function correctly. Blood is a good example of a biological system that must maintain a pH in a very narrow range from 7.3 to...
please help l, will rate! thabk you!!
Why does a solution of a weak acid and its conjugate base act as a better buffer than does a solution of the weak acid alone? The presence of both the acid and the base provides a significant concentration of both an acid and a base, making it harder to change the pH A solution of a weak acid alone has no base present to absorb added acid. The presence of both the...
A buffer solution is able to maintain a constant pH when small amounts of acid or base are added to the buffer. Consider what happens when 1 mL of a 5 M solution is added or 0.005 mol of HCl are added to a 100.0 mL solution acetic acid buffer that contains 0.0100 mol of Acetic acid, HC,H,O,, and 0.0100 mol of sodium acetate, NaC,H,O,. The initial concentration of both the acid and the base are 0.0100 mol/ 0.1000 L...
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