![3. The pH of coffee is approximately 5.0. How many times greater is the [HO] in coffee than in tap water having a pH of 8.0?](http://img.homeworklib.com/questions/eb42bea0-73d5-11ea-9fe3-eb5b4a6cf0c8.png?x-oss-process=image/resize,w_560)
Homework Answers
![Coffee pH = 5.0 [++] = [ ₃0 + 3 = 10 5.0 Tap water, pH= 8.0 (ht] = [ty of] = 108.0 Coffee is 1000 times greater in [130 t] th](http://img.homeworklib.com/questions/ebd9bf30-73d5-11ea-806a-89cb75590d30.png?x-oss-process=image/resize,w_560)
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3. The pH of coffee is approximately 5.0. How many times greater is the [HO]...
2) The pH of coffee is approximately 5.0. How many times greater is the [H'] in...
2) The pH of coffee is approximately 5.0. How many times greater is the [H'] in coffee than in neutral water? Ans: 3) Calculate the H' ion concentration in a 8.8 x 10-4M Ca(OH), solution. Ans: 4) Consider the weak acid CH COOH (acetic acid). If a 0.048 M CH:COOH solution is 5.2%) ionized, determine the [HO] concentration at equilibrium.
The pH of coffee is approximately 5.0. How many times greater is the [H3O+] in coffee...
The pH of coffee is approximately 5.0. How many times greater is the [H3O+] in coffee than in tap water having a pH of 8.0?
1. The pH of coffee is approximately 5.5. How many times greater is the (H') in Concom neutral water? Solution: 2....
1. The pH of coffee is approximately 5.5. How many times greater is the (H') in Concom neutral water? Solution: 2. Lakes that have been acidified by acid rain can be neutralized by liming, the addition of limestone (CaCO3). How much limestone in kilograms is required to completely neutralize a 3.8 x 10°L lake with a pH of 4.5? Solution:
8. What is the pH of a 5.00 x 102 M Ba(OH)2(aq) solution at room temperature?...
8. What is the pH of a 5.00 x 102 M Ba(OH)2(aq) solution at room temperature? a. 1.00 b. 1.30 c. 12.02 d. 12.70 e. 13.00 9. Assuming equal concentrations of conjugate acid and base, which one of the following mixtures is suitable for making a buffer solution with an optimum pH of 4.6-4.8? a. CH3COONa/CH3COOH (K = 1.8 x 105) b. NH/NHACI (K = 5.6 x 10-1) c. NaOCI/HOCI (Ka = 3.2 x 108) d. NaNO2/HNO2 (Ka = 4.5...
14. Calculate the pH of 26 x 102 M KOH. (1) 1241 (2)1550 (3)208 47 15....
14. Calculate the pH of 26 x 102 M KOH. (1) 1241 (2)1550 (3)208 47 15. Calculate the H* ion cancentration in lemon juice having a pH of 2 40 (1)401 00 59 4.0-10-ง M (2) 250 M the [H'] in offee than in neutral water? manganese(l) cartonate (MncO] is 42x 10 M. What is Kap for this oompound? (3) 0.38 M 440x0M 16. The pH of coffee is approximately 5.0. How mamy times groater is (1) 200 (2) 100...
**Problem 7C should have KOH listed as the solution, not NaOH Please circle the correct answer...
**Problem 7C should have
KOH listed as the solution, not NaOH
Please circle the correct answer and show all work for 7c.
Thanks
7. In a different titration, 50.0 mL of 0.150 M HF (pKa = 3.10) was titrated with a solution of 0.250 M KOH. A. (3 pts) The following figure represents solutions at various stages of the titration. (The K ions and water molecules have been omitted for clarity.) Which drawing corresponds to the region of the titration...
please help!! calculate pH of solutions on second page a-c!! 1. (4 points) A buffer solution...
please help!! calculate pH of solutions on second page a-c!!
1. (4 points) A buffer solution is created with C;H,NH, and 0.012 M C;HsNH2. The K, for C,H,NH2 is 4.7 х 104. What is the concentration of C,HNH, in the buffer solution that has a pH of 11.50? а. What is the concentration of the buffer solution if 0.0011 M HC is added to the buffer in part a.? b. Why is the buffer a basic solution? Could this weak...
How do you do these problems? I got all of them wrong and don't understand why....
How do you do these problems? I got all of them wrong and
don't understand why.
- 10. Which of the changes will increase the value of K, for the reaction? 2 SO2(g) + O2(g) - 2 SO3(g) AH = -200 kJ/mol A. Lowering the temperature B. Increasing the pressure (CCAdding 02 D. Removing SO, 3. Which reaction describes why the pH is not 7 for the dissolution of NaNO2 in water? ADNa+ + 2 H2O = NaOH + H2O*...
need help with 42 & 44 I am trying to figure out how to make a...
need help with 42 & 44
I
am trying to figure out how to make a desired buffer
42. What volumes of 0.50 M HNO2 and 0.50 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.55? 43. Consider a solution that contains both C5H5N and C5H5NHNO3. Calculate the ratio (C3H5N]/[C3H5NH+] if the solution has the following pH values: a. pH = 4.50 c. pH = 5.23 l g de to b. pH...
help with understanding practice problems What is the pH of a 0.036 M KOH? a. 0.08...
help with understanding practice problems
What is the pH of a 0.036 M KOH? a. 0.08 b. 1.44 e. 12.56 f. 15.96 c. d. 9.4 Compare the acid strength of two acids: IM hydroiodic acid (H) and IM hydrofluoric acid (HF). One of the diagrams shown below represents 1M HF, while the other one represents IM HI. Which diagram would most likely represent the 1M aqueous solution of HI (water molecules are not shown)? HA HA НА А: A: НА...
2) The pH of coffee is approximately 5.0. How many times greater is the [H'] in coffee than in neutral water? Ans: 3) Calculate the H' ion concentration in a 8.8 x 10-4M Ca(OH), solution. Ans: 4) Consider the weak acid CH COOH (acetic acid). If a 0.048 M CH:COOH solution is 5.2%) ionized, determine the [HO] concentration at equilibrium.
1. The pH of coffee is approximately 5.5. How many times greater is the (H') in Concom neutral water? Solution: 2. Lakes that have been acidified by acid rain can be neutralized by liming, the addition of limestone (CaCO3). How much limestone in kilograms is required to completely neutralize a 3.8 x 10°L lake with a pH of 4.5? Solution:
8. What is the pH of a 5.00 x 102 M Ba(OH)2(aq) solution at room temperature? a. 1.00 b. 1.30 c. 12.02 d. 12.70 e. 13.00 9. Assuming equal concentrations of conjugate acid and base, which one of the following mixtures is suitable for making a buffer solution with an optimum pH of 4.6-4.8? a. CH3COONa/CH3COOH (K = 1.8 x 105) b. NH/NHACI (K = 5.6 x 10-1) c. NaOCI/HOCI (Ka = 3.2 x 108) d. NaNO2/HNO2 (Ka = 4.5...
14. Calculate the pH of 26 x 102 M KOH. (1) 1241 (2)1550 (3)208 47 15. Calculate the H* ion cancentration in lemon juice having a pH of 2 40 (1)401 00 59 4.0-10-ง M (2) 250 M the [H'] in offee than in neutral water? manganese(l) cartonate (MncO] is 42x 10 M. What is Kap for this oompound? (3) 0.38 M 440x0M 16. The pH of coffee is approximately 5.0. How mamy times groater is (1) 200 (2) 100...
**Problem 7C should have
KOH listed as the solution, not NaOH
Please circle the correct answer and show all work for 7c.
Thanks
7. In a different titration, 50.0 mL of 0.150 M HF (pKa = 3.10) was titrated with a solution of 0.250 M KOH. A. (3 pts) The following figure represents solutions at various stages of the titration. (The K ions and water molecules have been omitted for clarity.) Which drawing corresponds to the region of the titration...
please help!! calculate pH of solutions on second page a-c!!
1. (4 points) A buffer solution is created with C;H,NH, and 0.012 M C;HsNH2. The K, for C,H,NH2 is 4.7 х 104. What is the concentration of C,HNH, in the buffer solution that has a pH of 11.50? а. What is the concentration of the buffer solution if 0.0011 M HC is added to the buffer in part a.? b. Why is the buffer a basic solution? Could this weak...
How do you do these problems? I got all of them wrong and
don't understand why.
- 10. Which of the changes will increase the value of K, for the reaction? 2 SO2(g) + O2(g) - 2 SO3(g) AH = -200 kJ/mol A. Lowering the temperature B. Increasing the pressure (CCAdding 02 D. Removing SO, 3. Which reaction describes why the pH is not 7 for the dissolution of NaNO2 in water? ADNa+ + 2 H2O = NaOH + H2O*...
need help with 42 & 44
I
am trying to figure out how to make a desired buffer
42. What volumes of 0.50 M HNO2 and 0.50 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.55? 43. Consider a solution that contains both C5H5N and C5H5NHNO3. Calculate the ratio (C3H5N]/[C3H5NH+] if the solution has the following pH values: a. pH = 4.50 c. pH = 5.23 l g de to b. pH...
help with understanding practice problems
What is the pH of a 0.036 M KOH? a. 0.08 b. 1.44 e. 12.56 f. 15.96 c. d. 9.4 Compare the acid strength of two acids: IM hydroiodic acid (H) and IM hydrofluoric acid (HF). One of the diagrams shown below represents 1M HF, while the other one represents IM HI. Which diagram would most likely represent the 1M aqueous solution of HI (water molecules are not shown)? HA HA НА А: A: НА...
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