A reaction occurs at a pH of approximately 5. Which of the following buffer systems would...
A reaction occurs at a pH of approximately 5. Which of the following buffer systems would be best used to make a solution with this pH?
Select one:
a. [CH3COOH] :[CH3COO-]
b. [H2PO4-]: [HPO42-]
c. [H2CO3] :[HCO3-]
d. none of these.
Homework Answers
Acetic acid sodium acetate buffer pH range is 3.7-5.6 and same for phosphate buffer varries from pH 5.8 to 8. The bicarbonate buffer is the one which mentains basic pH of our blood (pH of this buffer adove 7) .As pH 5 is suitable for the mentioned reaction so the correct answer will be
a) [CH3COOH];[CH3COO-]
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A reaction occurs at a pH of approximately 5. Which of the
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Buffer action 4 A buffer solution consisting of 0.05 mol/L acetic acid (CH3COOH) and 0.05 mol/L acetate (CH3COO-) has been used to buffer a 1 L solution at pH 4.7. A small amount of sodium hydroxide solution containing 0.0001 mol NaOH was added. Which of the following reactions best represents the buffer action? + Select one: O a. NaOH(aq) Na+(aq) + OH(aq) O b. CH3COOH(aq) + H2O(1) CH3COO(aq) H30*(aq) O c. CH3COO(aq) + H2O(0) CH3COOH(aq) OH(aq) O d. CH3COOH(aq) +...
In lab if you must make a buffer of pH=8.5, which of the following buffer systems...
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Which of the following acids would be best for preparing a buffer solution with an approximately...
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what concentrations of CH3COO- and CH3COOH of those below would give a buffer with a pH...
what concentrations of CH3COO- and CH3COOH of those
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Br What concentrations of [CH3COO 1 and [CH1COOH1 of those below would give a buffer with a pH of 4.11? (pKa CH3COOH = 4.84). 10 a) (CH3COO]-0.15 M, [CH3COOH] = 0.10 M b) [CH3COO]-0.10 M, [CH3COOH] = 0.53 M c) [CH3COO]-0.46 M, [CH3COOH]= 0.10 M d) [CH3COO]- 0.23 M, [CH3COOH] = 0.10 M 14
Which of the following combinations would be best to buffer an aqueous solution at a pH of 9.02 Use the References to access important values if needed for this question HNO2 and NO27, Kg = 4.5E-4 H3PO4 and H2PO4, Ka1 = 7.5E-3 H2P04 and HPO42-, K42 = 6.2E-8 CH2COH and CH3COO", KA = 1.8E-5 NHA and NH3, K= 5.7E-10 Submit Answer I question attempt remaining Autosaved at 10.16A
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what concentrations of CH3COO- and CH3COOH of those
below would give a buffer with a pH of 4.11 (pKa=
CH3COOH=4.84)
Br What concentrations of [CH3COO 1 and [CH1COOH1 of those below would give a buffer with a pH of 4.11? (pKa CH3COOH = 4.84). 10 a) (CH3COO]-0.15 M, [CH3COOH] = 0.10 M b) [CH3COO]-0.10 M, [CH3COOH] = 0.53 M c) [CH3COO]-0.46 M, [CH3COOH]= 0.10 M d) [CH3COO]- 0.23 M, [CH3COOH] = 0.10 M 14
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