Question
In: Chemistry
What is the pH of a solution prepared by mixing 25 ml of 0.5 HCN with...
What is the pH of a solution prepared by mixing 25 ml of 0.5 HCN with 75 ml of 0.20 NaCN. Ka = 6.2*10^-10 for HCN. Hint: remember to dilutions first.
Solutions
Expert Solution
HCN + NaCN is the buffer
25x0.5 75x0.20 mmoles
7.5/100 15/100 concentrations
the pH of this buffer is given by Hendersen equation as
pH = pKa + log [conjugate base] [acid]
= (10-log 6.2) + log 15x10-2/ 7.5x10-2
= 9.5086
queen_honey_blossom answered 2 years agoRelated Solutions
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...
What is the pH of a solution made by mixing 500 mL of 1.00 M HCN...
What is the pH of a solution made by mixing 500 mL of 1.00 M HCN
and 1.50 L of 0.250 M NaOH, and then diluting the entire solution
to a volume of 3.00 L? (Ka HCN = 4.0 x 10-10)
A.
8.92
B. 6.52
C.
9.88
D.
9.27
E.
5.08
To obtain one litre of a solution of pH = 7, you should dissolve
in water
A.
Two mol of HI + two mol of CH3NH2
B.
One mol...
What is the pH of a solution prepared by mixing 60.0 mL of 0.20M potassium carbonate...
What is the pH of a solution prepared by mixing 60.0 mL of 0.20M
potassium carbonate (K2CO3) with 140.0 mL of 0.1M potassium
bicarbonate (KHCO3)? a. 6.43 b. 6.30 c. 6.67 d. 10.32 e. 10.18
What is the pH of a solution made by mixing 25 mL of .050 M HNO3...
What is the pH of a solution made by mixing 25 mL of .050 M
HNO3 into a final volume of 2.0 Liters of water?
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...
11. Calculate the pH of a solution prepared by mixing a) 48.0 mL of 0.212 M...
11. Calculate the pH of a solution prepared by mixing
a) 48.0 mL of 0.212 M NaOH and 66.0 mL of 0.187 M HCl
b) 69.0 mL of 0.345 M KOH and 125 mL of 0.400 M HC3H5O2
c) 350 mL of 0.130 M NH3 and 400 mL of 0.100 M HCl
Calculate the pH of a solution prepared by mixing a) 25.0 mL of 0.512 M NaOH...
Calculate the pH of a solution prepared by mixing a) 25.0 mL of
0.512 M NaOH and 34.0 mL of 0.187 M HCl b) 46.0 mL of 0.235 M KOH
and 50.0 mL of 0.420 M HC3H5O2 c) 400 mL of 0.250 M NH3 and 250 mL
of 0.120 M HCl
Calculate the pH of a solution prepared by mixing a) 25.0 mL of 0.512 M NaOH...
Calculate the pH of a solution prepared by mixing
a) 25.0 mL of 0.512 M NaOH and 34.0 mL of 0.187 M HCl
b) 46.0 mL of 0.235 M KOH and 50.0 mL of 0.420 M
HC3H5O2
c) 400 mL of 0.250 M NH3 and 250 mL of 0.120 M
HCl
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 )
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- We are evaluating a project that costs $868,000, has a life of eight years, and has...
- a.) Given sample data: 61.2, 61.9, 62.8, 63.1, 64.0, 64.3, 64.9, 65.5, 66.3 and 67.9, test...
- A research paper describes an experiment in which 74 men were assigned at random to one...
- 1. Which components would a retail organization consider while surveying/assessing the suitability of its products for...
- Design and inplement a synchronous counter that counts.
- Another common second-order R-K method is Ralston’s method. For this method, a2=2/3. Derive expressions for a1,...
- Venus Cellular Limited (“Venus”) is the leading, worldwide provider of a wide variety of telecommunications equipment...
ADVERTISEMENT