Homework Answers
Solution :-
Q1 Ammonium chloride is the conjugate acid of the NH3 and sodium acetate is the conjugate base of the acetic acid.
A salt of strong acid and weak base gives the acidic solution
A salt of strong base and weak acid gives the basic solution
Following are the reaction equations
Reaction of the ammonium chloride in water
NH4Cl + H2O ------ > H3O+ + NH3 + Cl^-
It produces the H3O+ therefore the ammonium chloride is salt is acidic.
Reaction of sodium acetate in water
CH3COONa + H2O ------ > CH3COOH + OH- + Na^+
It produces the OH- therefore sodium acetate is basic in nature.
Q2 Reactions of the acetic acid and sodium acetate with addition of acid and base
Reaction when the acid is added
CH3COO^- + H^+ ---- > CH3COOH
Reaction when the base is added
CH3COOH + OH^- ----- > CH3COO^- + H2O
Q3) To find the consistency of the Ka value we need the calculated Ka value
Q4) A buffer solution is the solution which resist the sudden change in the pH when strong acid or base is added to the buffer solution because conjugate base of the buffer reacts with acid to neutralize it
When strong acid is added then pH slowly decreases and when base is added then pH is slowly increases, because acid from the buffer solution reacts with added base to neutralize it.
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Please help. I got the graph for part 2. Don't know anything help.
Please help with...
Lab 5: Buffers Data analysis 1. Write reaction equations to explain how your acetic acid- acetate...
Lab 5: Buffers Data analysis 1. Write reaction equations to explain how your acetic acid- acetate buffer reacts with an acid and with a base, respectively. 2. Buffer capacity has a rather loose definition, yet it is an important property of buffers. A commonly seen definition of buffer capacity is: "The amount of Hor OH that can be neutralized before the pH changes by one unit." Use your data to determine the buffer capacity of Buffer A and Buffer B....
please explain steps 1. Calculate the volume of glacial acetic acid (17.6 M) and mass of...
please explain steps
1. Calculate the volume of glacial acetic acid (17.6 M) and mass of sodium acetate (mm-82.03) required to make 102 ml of 0.20 M buffer at pH 4.85. The Ka of acetic acid is 1.4 x10. (this question is challenging, use the background section and your book for help). 2. Consult the table of Ka values in the back of your textbook and suggest acid/conjugate base system (mono-protic acid only) that would yield a strong buffer capacity...
Pre-Lab Calculating pH and Buffer Capacity (You must show work for credit) Name: 1. Calculate the...
Pre-Lab Calculating pH and Buffer Capacity (You must show work for credit) Name: 1. Calculate the volume of glacial acetic acid (17.6 M) and mass of sodium acetate (mm 82.03) required to make 102 ml of 0.20 M buffer at pH 4.85. The Ka of acetic acid is 1.4 x10. (this question is challenging, use the background section and your book for help). 2. Consult the table of Ka values in the back of your textbook and suggest acid/conjugate base...
please help me answer this des ates are read DATA TABLE Buffer A Volume of buffer...
please help me answer this
des ates are read DATA TABLE Buffer A Volume of buffer prepared (mL) Buffer B 100.0 mL 100.0 mL Molar concentration of HC,H,Oz in buffer (M) 0.1 M 1.0 M Initial pH of buffer 4.05 4.08 Volume of 0.5 M NaOH to raise pH by 2 units 1.54 mi 9.68 ml Volume of 0.5 M HCI to lower pH by 2 units (ML) 3.4 mL 5.5 mi DATA ANALYSIS 1. Write reaction equations to explain...
help with these chemistry questions 1. Explain what happens to the concentration of H,O' ions in...
help with these chemistry questions
1. Explain what happens to the concentration of H,O' ions in an acetic acid solution when solid sodium acetate is added. 2. Determine the pH and pH of a solution that is 0.5 M NaHSO4 and 0.25 M Na2SO4 3. When sodium nitrite is added to HNO2(aq) a) the equilibrium concentration of HCOOH(aq) decreases. b) the pH of the solution increases. c) the K increases. d) the pH of the solution does not change. e)...
OF LOL CON 's ord solution, repeat Sog or more uningtod mean mosom on AM DATA...
OF LOL CON 's ord solution, repeat Sog or more uningtod mean mosom on AM DATA TABLE Buffer Heat of comastioni Mognum Wor hords sobre precachers Pra Question calculated mass of NOCCHI 1.25g .259 Mass of NOCCH. used to prepare butter 2.5099 1000 1000 Volume of butter prepared .) Molar concentration of HO.CCH. in butter (M) 0.1 10 protspun Initial pH of buffer 430 4.29 Volume of OS MNOH to raise ph by 2 units mL) ve vor 2. IML...
DATA AND CALCULATION Preparation and Base Buffer Capacity of Buffer A Mass of sodium acetate used...
DATA AND CALCULATION Preparation and Base Buffer Capacity of Buffer A Mass of sodium acetate used 0.3730g Actual pH of the buffer 5.27 Volume of the buffer used in buffer capacity titration 20.0 mL Volume (mL) of standardized NaOH used to change the pH by 1 unit 17.5 mL Concentration of standardized NaOH 0.100M Moles of NaOH needed to change the pH by 1 unit for the buffer 0.00095 mol The buffer capacity as moles of base per Liter buffer...
2 buffer questions please. data table and questions in pics Buffers In your “Results” section you...
2
buffer questions please.
data table and questions in pics
Buffers In your “Results” section you should report the initial pH of each buffer you made as well as the buffering capacity of each solution. . Write reaction equations that show how your acetic acid-acetate buffer reacts with an acid, H+, and with a base, OH”. Buffer A Buffer B 39 Mass of NaC2H5O2 used to prepare buffer (9) 039 MOD. 20 Volume of buffer prepared (mL) mbao 20 Molar...
1. Without doing any math, which solution has a lower pH: (a) 0.05 M acetic acid,...
1. Without doing any math, which solution has a lower pH: (a) 0.05 M acetic acid, or (b) a buffer prepared from 0.05 acetic acid and 0.05 M sodium acetate. Explain your answer. 2. Without doing any math, which solution has a lower pH: (a) 0.05 M acetic acid that has been titrated to its endpoint using NaOH, or (b) a buffer prepared from 0.05 acetic acid and 0.05 M sodium acetate. Explain your answer. 3. What pH did you...
Question: In the space below, discuss tour observations and compare the use of a buffered versus...
Question: In the space below, discuss tour observations and
compare the use of a buffered versus a non-buffered solution (DI
water) with the addition of a strong acid or base.
Part C: K, Acid Dissociation Constant Acetic Acid pH | [H] | K Calculation Concentration (2.83 x 10 2.82 104 7.95 x 10-6 0.010 M 3.55 0.10 M (8.71 * 10-4) (0.1) 7.59x10-6 3.00 18.71x10 *M 1.0 M 2.71 (1.95 x 10-5) (1.03 1.95 x 10-3M 3.80 x 10-6 LHO...
Lab 5: Buffers Data analysis 1. Write reaction equations to explain how your acetic acid- acetate buffer reacts with an acid and with a base, respectively. 2. Buffer capacity has a rather loose definition, yet it is an important property of buffers. A commonly seen definition of buffer capacity is: "The amount of Hor OH that can be neutralized before the pH changes by one unit." Use your data to determine the buffer capacity of Buffer A and Buffer B....
please explain steps
1. Calculate the volume of glacial acetic acid (17.6 M) and mass of sodium acetate (mm-82.03) required to make 102 ml of 0.20 M buffer at pH 4.85. The Ka of acetic acid is 1.4 x10. (this question is challenging, use the background section and your book for help). 2. Consult the table of Ka values in the back of your textbook and suggest acid/conjugate base system (mono-protic acid only) that would yield a strong buffer capacity...
Pre-Lab Calculating pH and Buffer Capacity (You must show work for credit) Name: 1. Calculate the volume of glacial acetic acid (17.6 M) and mass of sodium acetate (mm 82.03) required to make 102 ml of 0.20 M buffer at pH 4.85. The Ka of acetic acid is 1.4 x10. (this question is challenging, use the background section and your book for help). 2. Consult the table of Ka values in the back of your textbook and suggest acid/conjugate base...
please help me answer this
des ates are read DATA TABLE Buffer A Volume of buffer prepared (mL) Buffer B 100.0 mL 100.0 mL Molar concentration of HC,H,Oz in buffer (M) 0.1 M 1.0 M Initial pH of buffer 4.05 4.08 Volume of 0.5 M NaOH to raise pH by 2 units 1.54 mi 9.68 ml Volume of 0.5 M HCI to lower pH by 2 units (ML) 3.4 mL 5.5 mi DATA ANALYSIS 1. Write reaction equations to explain...
help with these chemistry questions
1. Explain what happens to the concentration of H,O' ions in an acetic acid solution when solid sodium acetate is added. 2. Determine the pH and pH of a solution that is 0.5 M NaHSO4 and 0.25 M Na2SO4 3. When sodium nitrite is added to HNO2(aq) a) the equilibrium concentration of HCOOH(aq) decreases. b) the pH of the solution increases. c) the K increases. d) the pH of the solution does not change. e)...
OF LOL CON 's ord solution, repeat Sog or more uningtod mean mosom on AM DATA TABLE Buffer Heat of comastioni Mognum Wor hords sobre precachers Pra Question calculated mass of NOCCHI 1.25g .259 Mass of NOCCH. used to prepare butter 2.5099 1000 1000 Volume of butter prepared .) Molar concentration of HO.CCH. in butter (M) 0.1 10 protspun Initial pH of buffer 430 4.29 Volume of OS MNOH to raise ph by 2 units mL) ve vor 2. IML...
2
buffer questions please.
data table and questions in pics
Buffers In your “Results” section you should report the initial pH of each buffer you made as well as the buffering capacity of each solution. . Write reaction equations that show how your acetic acid-acetate buffer reacts with an acid, H+, and with a base, OH”. Buffer A Buffer B 39 Mass of NaC2H5O2 used to prepare buffer (9) 039 MOD. 20 Volume of buffer prepared (mL) mbao 20 Molar...
1. Without doing any math, which solution has a lower pH: (a) 0.05 M acetic acid, or (b) a buffer prepared from 0.05 acetic acid and 0.05 M sodium acetate. Explain your answer. 2. Without doing any math, which solution has a lower pH: (a) 0.05 M acetic acid that has been titrated to its endpoint using NaOH, or (b) a buffer prepared from 0.05 acetic acid and 0.05 M sodium acetate. Explain your answer. 3. What pH did you...
Question: In the space below, discuss tour observations and
compare the use of a buffered versus a non-buffered solution (DI
water) with the addition of a strong acid or base.
Part C: K, Acid Dissociation Constant Acetic Acid pH | [H] | K Calculation Concentration (2.83 x 10 2.82 104 7.95 x 10-6 0.010 M 3.55 0.10 M (8.71 * 10-4) (0.1) 7.59x10-6 3.00 18.71x10 *M 1.0 M 2.71 (1.95 x 10-5) (1.03 1.95 x 10-3M 3.80 x 10-6 LHO...
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