Homework Answers
acidic buffer is formed by weak acid and its conjugate base
basic buffer is formed by weak base and its conjugate acid
a)
HC2H3O2 is weak acid
C2H3O2- is conjugate base
They form acidic buffer
b)
H2SO3 is weak acid
HSO3- is conjugate base
They form acidic buffer
c)
H3PO4 is weak acid
H2PO4- is conjugate base
They form acidic buffer
d)
HNO3 is strong acid.
It will not form buffer
e)
NH3 is weak base
NH4+ is conjugate acid
They form basic buffer
Answer: d
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Please explain. PRACTICE 1: Which one of the following combinations does not create a buffer? a) HC2H302 and K C2H30...
Which one of the following sets of compounds is not characteristic of a buffer? OCH3CO2H with...
Which one of the following sets of compounds is not characteristic of a buffer? OCH3CO2H with NaCH3CO2 O NaH2PO4 with Na2HPO4 O NH3 with NH4Cl O HNO3 with NaNO3
which of the following combinations, when disolved in equi - molar amounts in water, would produce...
which of the following combinations, when disolved in equi - molar amounts in water, would produce a buffer solution? A) NaCl and NaC2H3O2 B) HC2H3O2 and NaCl C) HNO3 and NaOH D) NaNO3 and NH3 E) NH3 and NH4Cl
Which of the following pairs create a buffer when they are mixed in water? HC2H302 and...
Which of the following pairs create a buffer when they are mixed in water? HC2H302 and NaC2H302 HCl and NH3 HF and HCI NaOH and NH3
26) Which one of the following pairs cannot be mixed together to form a buffer solution? A) C5 H5N, C5H5NHCI B) HC2...
26) Which one of the following pairs cannot be mixed together to form a buffer solution? A) C5 H5N, C5H5NHCI B) HC2H302, NaOH (C2H302° = acetate) C) NaCIO. HNO3 D) NH2CH3, HCI E) KOH, HI
Which of the following pairs is suitable for making a buffer solution? Select one: O a....
Which of the following pairs is suitable for making a buffer solution? Select one: O a. CH3COOH and HCOOH Вь b. H2S and H2SO4 O c. Na2SO4 and H2SO4 O d. H3PO4 and NaH2PO4 Oе. NH4Cl and NH4OH
Which of the following combinations can be used to prepare a buffer? a) HCNaCI b) HF/KF...
Which of the following combinations can be used to prepare a buffer? a) HCNaCI b) HF/KF c) NH3/NH4C d) HNO3/HNO2 e) NaNO2/HNO3 17.2.1
2) Which one of the following pairs cannot be mixed together to form a buffer solution?...
2) Which one of the following pairs cannot be mixed together to form a buffer solution? A) NaC2H302, HCI (C2H302 = acetate) B) H3PO4, KH2P04 C) NH3, NH4CI D) RbOH, HBr E) KOH, HE
Select any of the following combinations which would make a good buffer solution? O 0.3 M...
Select any of the following combinations which would make a good buffer solution? O 0.3 M HC2H302 + 0.1 M HCI 0.05 M H2CO3 + 0.05 M KHCO3 0.05 M KC2H302 0 0.1 M HCN + 0.2 M NaCN 0.2 M NaF + 0.2 M NaOH O 0.3 M NH4CI O 0.2 M NH3 + 0.1 M NH4Br O 0.3 M NH4Cl + 0.1 M HCI O 0.3 M NH4Cl + 0.1 M NH3 O 0.5 M HI + 0.5...
please explain. PRACTICE 1: Which of the following combinations can result in the formation of a...
please explain.
PRACTICE 1: Which of the following combinations can result in the formation of a buffer? a) 50 mL of 0.10 M HF with 50 mL of 0.10 M NaOH. b) 50 mL of 0.10 M HNO2 with 25 mL of 0.10 M Ca(OH)2. C) 50 mL of 0.10 M CH3CO2H with 60 mL of 0.10 M NaOH. d) 50 mL of 0.10 M HF with 30 mL of 0.10 M NaOH.
Ka for NH4^+ ion is 5.6x10^-10 at 25 oC. Which of the following combinations of reagents...
Ka for NH4^+ ion is 5.6x10^-10 at 25 oC. Which of the following combinations of reagents will produce a buffer with pH=8.85 ? a) 1 mol NH4Cl and .4 mol NH3 b) 1.4 mol NH4Cl and .4 mol NaOH c) 1 mol HCl and 1.4 mol NH3 d) all of these e) none of these
Which one of the following sets of compounds is not characteristic of a buffer? OCH3CO2H with NaCH3CO2 O NaH2PO4 with Na2HPO4 O NH3 with NH4Cl O HNO3 with NaNO3
Which of the following pairs create a buffer when they are mixed in water? HC2H302 and NaC2H302 HCl and NH3 HF and HCI NaOH and NH3
26) Which one of the following pairs cannot be mixed together to form a buffer solution? A) C5 H5N, C5H5NHCI B) HC2H302, NaOH (C2H302° = acetate) C) NaCIO. HNO3 D) NH2CH3, HCI E) KOH, HI
Which of the following pairs is suitable for making a buffer solution? Select one: O a. CH3COOH and HCOOH Вь b. H2S and H2SO4 O c. Na2SO4 and H2SO4 O d. H3PO4 and NaH2PO4 Oе. NH4Cl and NH4OH
Which of the following combinations can be used to prepare a buffer? a) HCNaCI b) HF/KF c) NH3/NH4C d) HNO3/HNO2 e) NaNO2/HNO3 17.2.1
2) Which one of the following pairs cannot be mixed together to form a buffer solution? A) NaC2H302, HCI (C2H302 = acetate) B) H3PO4, KH2P04 C) NH3, NH4CI D) RbOH, HBr E) KOH, HE
Select any of the following combinations which would make a good buffer solution? O 0.3 M HC2H302 + 0.1 M HCI 0.05 M H2CO3 + 0.05 M KHCO3 0.05 M KC2H302 0 0.1 M HCN + 0.2 M NaCN 0.2 M NaF + 0.2 M NaOH O 0.3 M NH4CI O 0.2 M NH3 + 0.1 M NH4Br O 0.3 M NH4Cl + 0.1 M HCI O 0.3 M NH4Cl + 0.1 M NH3 O 0.5 M HI + 0.5...
please explain.
PRACTICE 1: Which of the following combinations can result in the formation of a buffer? a) 50 mL of 0.10 M HF with 50 mL of 0.10 M NaOH. b) 50 mL of 0.10 M HNO2 with 25 mL of 0.10 M Ca(OH)2. C) 50 mL of 0.10 M CH3CO2H with 60 mL of 0.10 M NaOH. d) 50 mL of 0.10 M HF with 30 mL of 0.10 M NaOH.
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