Question
In: Chemistry
a. What is the pH of the buffer prepared by mixing 250. mL of 0.200 M...
a. What is the pH of the buffer prepared by mixing 250. mL of 0.200 M benzoic acid and 100. mL of 0.250M NaOH? pKa=4.19
b. A buffer containing 1.00 M concentrations of HOAc and NaOAc has a pH of 4.742. (a) What is the pH of the soln’ after 0.0100 mol of HCl has been added to 1.00 L of the buffer? (b) What is the pH of the soln’ after the addition of 0.0100 mol of NaOH? (c) What is the buffer capacity and pH change for each soln’ [ in (a) and (b)]?
Solutions
queen_honey_blossom answered 10 months agoRelated Solutions
A buffer solution was prepared by mixing 300.0 mL of a 0.200 M solution of hydroxylamine...
A buffer solution was prepared by mixing 300.0 mL of a 0.200 M
solution of hydroxylamine (OHNH2, Kb = 1.1 × 10-8) and 250.0 mL of
a 0.300 M solution of its hydrochloride salt (OHNH3+ Cl- ).
Calculate the pH of the solution after the addition of 1.08 g of
solid NaOH (molar mass = 40.00 g/mol). Assume that there is no
volume change upon the addition of solid.
A buffer solution was prepared by mixing 300.0 mL of a 0.200 M solution of hydroxylamine...
A buffer solution was prepared by mixing 300.0 mL of a 0.200 M
solution of hydroxylamine (OHNH2, Kb = 1.1 ×
10-8) and 250.0 mL of a 0.300 M solution of its
hydrochloride salt (OHNH3+ Cl- ).
Calculate the pH of the solution after the addition of 1.08 g of
solid NaOH (molar mass = 40.00 g/mol). Assume that there is no
volume change upon the addition of solid.
A.
8.22
B.
5.55
C.
6.30
D.
5.78
What is the pH of a buffer prepared by mixing 20.00 mL of 0.0300 M ammonium...
What is the pH of a buffer prepared by mixing 20.00 mL of 0.0300
M ammonium chloride with 40.00 mL of 0.0450 M ammonia? What is the
resulting pH if 1.00 mL of 0.10 M HCl is added to this
solution?
What is the pH of a buffer that is prepared by mixing 30.0 mL of 1.0...
What is the pH of a buffer that is prepared by mixing 30.0 mL of
1.0 M HF and 20.0 mL of 2.0 M KF? (Ka for HF 7.2 x
10−4)
What is the pH of a solution that contains 0.40 M CH3COOH and
0.30 M CH3COONa at 25°C (Ka=1.8 x 10−5)?
What is the pH of a buffer that is prepared by mixing 30.0 mL of 1.0...
What is the pH of a buffer that is prepared by mixing 30.0 mL of
1.0 M HF and 20.0 mL of 2.0 M KF? (K a a for HF 7.2 x 10 −4 )
a) What is the pH of a buffer solution prepared by mixing 120 mL of a...
a) What is the pH of a buffer solution prepared by mixing 120 mL
of a 0.435 M CH3CO2H with 50 mL of a .286 M
CH3CO2Na solution?
CH3CO2H Ka = 1.75 x
10-5
b) What is the resulting pH if we add 10.2 mL of a .513 M HCl
solution to this buffer? Does the pH make sense? Why/why not?
c) What is the resulting pH if we add 3.56 mL of a 0.420 M NaOH
solution to the...
A solution is prepared by mixing 150.0 mL of 0.200 M Mg2+ and 250.0 mL of...
A solution is prepared by mixing 150.0 mL of 0.200 M Mg2+ and
250.0 mL of 0.100 M F-. A precipitate forms. Calculate the
concentrations of Mg2+ and F- at equilibrium. Ksp = 6.4 × 10-9
1. Determine the pH of the buffer solution that is prepared by mixing 259 mL of...
1. Determine the pH of the buffer solution that is prepared by
mixing 259 mL of 0.0983 M BIS−TRIS propane−H (C11H27N2O6+ ) to 855
mL of 0.0729 M BIS-TRIS_propane (C11H26N2O6) ). Assume the 5%
approximation is valid. Report your answer to 2 decimal places. The
pKa of BIS−TRIS propane−H is 9.10. Submit Answer Tries 0/3 2.
Determine the pH of the BIS−TRIS propane−H/BIS−TRIS propane buffer
solution after the addition of 25.2 mL of 0.643 M solution of
rubidium hydroxide to...
A buffer is prepared by adding 150 mL of 1.0 M NaOH to 250 mL of...
A buffer is prepared by adding 150 mL of 1.0 M NaOH to 250 mL of
1.0 M NaH2PO4. How many moles of HCl must be
added to this buffer solution to change the pH by 0.25 units?
Assume the total volume remains unchanged at 400 mL.
For H2PO4-, Ka = 6.3 ×
10-8.
calculate the ph of a solution made by mixing 20.0 ml of 0.200 m h2so3, 10.0...
calculate the ph of a solution made by mixing 20.0 ml of 0.200 m
h2so3, 10.0 ml of 0.120m naoh, 10.0ml of 0.150 m hcl, and 10.0ml of
0.200 m na2so3. (pka1: 1.857, pka2: 7.172 for h2so3)
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