Buffer is the mixture of weak acid/base with its conjugate base/acid.
So NaHCO3 will make buffer
(e) is correct option
Which of the following substances can be used to make a buffer with Na2SO3? a) H2CO3...
which of the following substances could be used to make a buffer solution when added to a solution of HCN? A) HBr B) LiCN C) LiOH D) H2CO3 E) LiBr
10 The goal is to make a buffer with a pH 7.0 that has a concentration of o.1M using the components below H 2CO3 (pKa1 3.6, pKa2 10.3) H2SO3 (pKa1 1.9, pKa2 7.21) a) Which of the following compounds would you use as the base component of the buffer? (Circle one) H2CO3 NaHCO Na2CO3 H2SO3 NaHSO Na2SO3 b) Which of the following compounds would you use as the acid component of the buffer? (Circle one) H2CO3 NaHCO Na2CO3 H2SO3 NaHSO...
Question 14 3 pts Which of the following pairs would be appropriate to make a buffer of PH 2.0? O HNO2 and KNO2 O NaHSO4 and H2SO4 Na2SO3 and NaHSO3 Na2HPO4 and Na3PO4 O H2C204 and NaHC204 3 pts Question 15 Which of the following pairs will make a buffer? Question 3 3 pts What is the solubility of SrF2 (s) in moles per liter (mol/L) in pure water? O 3.7 x 10-5 O 5.3 x 105 O 2.8 x...
Which of the following combinations can be used to make a buffer? (Assume equal volumes are used.) Question 6 of 14 Submit Which of the following combinations can be used to make a buffer? (Assume equal volumes are used.) A) 0.50 M HF and 0.20 M NaF B) 0.50 M F and 0.50 M NaOH C) 0.50 M HF and 0.50 M HCI D) 0.50 M HCl and 0.50 M NaF Teams Bachelor TOT ASSOCI Type here to search O...
5. You need to make 500.0 mL of a buffer with a pH of 2.20. You have the following substances to work with: 0.100 M NH3 Solid NaN3 Solid NaClO2 0.100 M HClO2 Solid NH4Cl Solid Na2SO3 0.100 M HN3 Solid NaHSO3 Ka for HClO2 = 1.1x10-2 Kb for NH3 = 1.8x10-5 Ka for HN3 = 1.9x10-5 Ka1 for H2SO3 = 1.7x10-2 Ka2 for H2SO3 = 6.4x10-8 (Assume that the addition of solid does not change the volume of the...
To make a buffer, a student mixes H2CO3 with NaHCO3 to form a solution which is 0.012 M carbonic acid (H2CO3) and 0.012 M (NaHCO3). The pH of the buffer solution is 6.37 The student adds 10.0 mL of 0.100 M NaOH to a fresh solution of his buffer. Calculate the pH after the addition of NaOH.
One common biological buffer is the carbonic acid (H2CO3) / bicarbonate (HCO3-) buffer. Which of the following statements describes what happens when a small amount of a strong acid is added to the buffer system: A. the amount of bicarbonate increases B. the amount of bicarbonate decreases C. the amount of carbonic acid increases D. the amount of carbonic acid decreases E. both b & c
Which of the following combinations can be used to make a buffer? A) 0.20 M NH3 and 0.20 M HCI B) 0.20 M NH3 and 0.10 M NH4CI C) 0.20 M NH3 and 0.10 M HF D) 0.10 M NH4CI and 0.10 M NaF
Predict whether each of the following pairs of substances could function as a buffer system in aqueous solution. A simple Yes or No answer is sufficient a.) HBr , Br [Select) b.) H2PO4.HPO42- [Select] c.) HF.F [Select d.) H2CO3. CO 2 [Select]
Which of the following substances will be best for preparing a buffer solution with a pH=7.4 Acid HCIO 2.9 x 10-8 H2CO3 4.4 x 10-7 HNO2 7.4 x 10-4 NH4 5.8 x 10-10 HCIO HNO2 NH4 O H₂CO₃