![=neutral Salt (ka=kb) 16 - 10.2] 1715 = Calculated K, for 0.1 MNH.CI, based on measured pH and Equation log CH 30+) chokw/kbp](http://img.homeworklib.com/questions/ac8823e0-136a-11ea-ad93-dbda984e04c6.png?x-oss-process=image/resize,w_560)
Homework Answers
The salt hydrolysis constant (Kh) for 0.1 M NH4Cl can be calculated as follows.
Kh = Kw/Kb = 10-14/(1.8*10-5) = 5.56*10-10
Now, [H+] = ([NH4Cl]*Kh)1/2 = (0.1 * 5.56*10-10)1/2 = 7.45*10-6
i.e. pH = -Log[H+] = -Log(7.45*10-6) = 5.13
Add Answer to:
This pH is close to the pH of the original buffer solution (7.52). Procedure Preview vations =neutral Salt (ka=kb)...
REPOSTING: observing pH changes in Water and Buffer solutions. the amount added of HCl and NaOH...
REPOSTING: observing pH changes in Water and Buffer
solutions.
the amount added of HCl and NaOH are both 25mL.
the buffer solution is made of 2grams of NaC2H3O2 and
4 mL of 6M HC2H3O2 in a 50 mL solution (46mL of water). the
solution will contain 2.4x10^-2 mol each of NaC2H3O2 a d
HC2H3O2.
question:
how to answer it (I'm not sure I'm doing it right and
want an expert to double check):
I need help calculating the theoretical and...
buffer is HC2H3O2/NaC2H3O2 difference in PH: big change when added to buffer. small change when added...
buffer is HC2H3O2/NaC2H3O2
difference in PH: big change when added to buffer. small
change when added to water. why?
why such a bug change when you add an acud or base to water
but not to butfer?
1. a) Describe the difference in observed pH changes upon adding a small amount of strong acid or base to 25.0 mL of water vs to 25.0 mL of your buffer. b) Explain why there was a difference. 6.0M HC,H,O, is corrosive. Prevent...
EQUL 499- Det. Of pH of Strong Acid, weak acid, salt, and buffer solution Discussion Topics...
EQUL 499- Det. Of pH of Strong Acid, weak acid, salt, and buffer solution Discussion Topics Discussion Topics (need to submit in Blackboard): 1. What is a buffer? • A buffer is a solution that, when introduced to a new environment, undergoes minimal pH change, typically when adding acidic or basic solutions. These are extremely important for life because the pH of human blood is delicate and even if it is changed by 0.1, there may be catastrophic effects. 2....
Prepare dilute acid and base solutions and buffered acid and base solutions to observe how buffering...
Prepare dilute acid and base solutions and buffered acid and base solutions to observe how buffering affects the pH. Use four clean, dry 50 ml beakers. Put these pH measurments in the Data Sheet Dilute NaOH Beaker 3 1. add 25 mL distilled H2O Buffered NaOH Beaker 4 1. add 25 mL of original buffer solution Dilute HCI Buffered HCI Beaker 1 Beaker 2 1. add 25 mL distilled 1. add 25 mL of H2O original buffer solution 2. Measure...
Please help, I'm so confused!!!! This is due wednesday night!!! i'm gonna fail :(((( pH of...
Please help, I'm so confused!!!! This is due wednesday night!!!
i'm gonna fail :((((
pH of Buffer Solutions Procedure: Acetic Acid-Sodium Acetate Buffer (pKa acetic acid = 4.75) Weigh about 3.5 g of Na2C2H302 3H2O, record the exact mass, and add to a 250 ml beaker. Measure exactly 8.8 mL of 3.0 M acetic acid (use 10 mL grad cylinder) and add to the beaker containing the sodium acetate. • Measure exactly 55.6 mL of distilled water and add to...
pH of a buffer solution pH and Buffers IV pH of a Buffer Solution A.2019 Mass of sodium acetate, CH,COONa, g Mea...
pH of a buffer solution
pH and Buffers IV pH of a Buffer Solution A.2019 Mass of sodium acetate, CH,COONa, g Measured pH Calculated pH buffer solution prepared with dissolved CH,COONa +8.5 mL CH,COOH (aq) 5.54 40 mL buffer + 1.0 mL of 6.0 M HCI (aq) 4/.ces 40 mL buffer + 1.0 mL of 6.0 M NaOH (aq) 5.02 Calculated pH Measured pH 5,54 deionized water 40 mL DI water +1.0 mL of 6.0 M HCI (aq) 1.C03 40...
This is from a Study of Buffer Solutions and pH of Salt Solutions Lab. I calculated...
This is from a Study of Buffer Solutions and pH of Salt
Solutions Lab. I calculated Ka to be 3.2*10^-5. Why is my value
larger than the standard value?
Procedure:
10. How does your calculated value of Ka compare with the standard value of Ka for acetic acid? Discuss why your value may be larger or smaller than the standard value. Caleutats Ka 3.2x 10-5) Cyato-s Learning Objectives: 1. To test the acidic and basic properties of ionic compounds 2....
pH and Buffers IV. pH of a Buffer Solution Mass of sodium acetate, CH,COONa, g 4.2009...
pH and Buffers IV. pH of a Buffer Solution Mass of sodium acetate, CH,COONa, g 4.2009 COOM Calculated pH Measured pH buffer solution prepared with dissolved CHCOONa+ 8.5 mL CH, COOH(aq) 5.54 40 mL buffer + 1.0 mL of 6.0 M HCl(aq) 14.05 40 mL buffer + 1.0 mL of 6.0 M NaOH(aq) 5.02 Calculated pH Measured pH 5.54 1063 deionized water 40 mL DI water + 1.0 mL of 6.0 M HCl (aq) 40 mL DI water + 1.0...
write neatly How is Buffer Capacity Affected by Dilution? Solution pH &.69 9.51 4.35 l2.20 distilled...
write neatly
How is Buffer Capacity Affected by Dilution? Solution pH &.69 9.51 4.35 l2.20 distilled water after adding 2 mL 0.100 M NaOH solution 4.ut 12.00 after adding another 2 mL NaOH solution 4.50 diluted buffer 4.5t 5.10 after adding 2 mL 0.100 M NaOH solution after adding another 2 mL NaOH solution 4.11-4.48 t44.51 buffer after adding 2 mL 0.100 M NaOH solution after adding another 2 mL NaOH solution Describe how the three solutions differ in their...
please solve the calculation page DATA SHEET: PH, BUFFERS AND K, Part 1: The Titration of...
please solve the calculation page
DATA SHEET: PH, BUFFERS AND K, Part 1: The Titration of a STRONG ACID (HCI) with NaOH using pH meter a) pH of 25 mL distilled water 5.65 (Measure volume with graduated cylinder) b) pH of 25 mL distilled water with 1 drop 1.0 M HCI 2.92 c) pH of 25 mL distilled water with 10 drops 1.0 M HCI (Note: (H') in 2c is about 10 times that of 2b) 1.10 d) Titration of...
REPOSTING: observing pH changes in Water and Buffer
solutions.
the amount added of HCl and NaOH are both 25mL.
the buffer solution is made of 2grams of NaC2H3O2 and
4 mL of 6M HC2H3O2 in a 50 mL solution (46mL of water). the
solution will contain 2.4x10^-2 mol each of NaC2H3O2 a d
HC2H3O2.
question:
how to answer it (I'm not sure I'm doing it right and
want an expert to double check):
I need help calculating the theoretical and...
buffer is HC2H3O2/NaC2H3O2
difference in PH: big change when added to buffer. small
change when added to water. why?
why such a bug change when you add an acud or base to water
but not to butfer?
1. a) Describe the difference in observed pH changes upon adding a small amount of strong acid or base to 25.0 mL of water vs to 25.0 mL of your buffer. b) Explain why there was a difference. 6.0M HC,H,O, is corrosive. Prevent...
EQUL 499- Det. Of pH of Strong Acid, weak acid, salt, and buffer solution Discussion Topics Discussion Topics (need to submit in Blackboard): 1. What is a buffer? • A buffer is a solution that, when introduced to a new environment, undergoes minimal pH change, typically when adding acidic or basic solutions. These are extremely important for life because the pH of human blood is delicate and even if it is changed by 0.1, there may be catastrophic effects. 2....
Prepare dilute acid and base solutions and buffered acid and base solutions to observe how buffering affects the pH. Use four clean, dry 50 ml beakers. Put these pH measurments in the Data Sheet Dilute NaOH Beaker 3 1. add 25 mL distilled H2O Buffered NaOH Beaker 4 1. add 25 mL of original buffer solution Dilute HCI Buffered HCI Beaker 1 Beaker 2 1. add 25 mL distilled 1. add 25 mL of H2O original buffer solution 2. Measure...
Please help, I'm so confused!!!! This is due wednesday night!!!
i'm gonna fail :((((
pH of Buffer Solutions Procedure: Acetic Acid-Sodium Acetate Buffer (pKa acetic acid = 4.75) Weigh about 3.5 g of Na2C2H302 3H2O, record the exact mass, and add to a 250 ml beaker. Measure exactly 8.8 mL of 3.0 M acetic acid (use 10 mL grad cylinder) and add to the beaker containing the sodium acetate. • Measure exactly 55.6 mL of distilled water and add to...
pH of a buffer solution
pH and Buffers IV pH of a Buffer Solution A.2019 Mass of sodium acetate, CH,COONa, g Measured pH Calculated pH buffer solution prepared with dissolved CH,COONa +8.5 mL CH,COOH (aq) 5.54 40 mL buffer + 1.0 mL of 6.0 M HCI (aq) 4/.ces 40 mL buffer + 1.0 mL of 6.0 M NaOH (aq) 5.02 Calculated pH Measured pH 5,54 deionized water 40 mL DI water +1.0 mL of 6.0 M HCI (aq) 1.C03 40...
This is from a Study of Buffer Solutions and pH of Salt
Solutions Lab. I calculated Ka to be 3.2*10^-5. Why is my value
larger than the standard value?
Procedure:
10. How does your calculated value of Ka compare with the standard value of Ka for acetic acid? Discuss why your value may be larger or smaller than the standard value. Caleutats Ka 3.2x 10-5) Cyato-s Learning Objectives: 1. To test the acidic and basic properties of ionic compounds 2....
pH and Buffers IV. pH of a Buffer Solution Mass of sodium acetate, CH,COONa, g 4.2009 COOM Calculated pH Measured pH buffer solution prepared with dissolved CHCOONa+ 8.5 mL CH, COOH(aq) 5.54 40 mL buffer + 1.0 mL of 6.0 M HCl(aq) 14.05 40 mL buffer + 1.0 mL of 6.0 M NaOH(aq) 5.02 Calculated pH Measured pH 5.54 1063 deionized water 40 mL DI water + 1.0 mL of 6.0 M HCl (aq) 40 mL DI water + 1.0...
write neatly
How is Buffer Capacity Affected by Dilution? Solution pH &.69 9.51 4.35 l2.20 distilled water after adding 2 mL 0.100 M NaOH solution 4.ut 12.00 after adding another 2 mL NaOH solution 4.50 diluted buffer 4.5t 5.10 after adding 2 mL 0.100 M NaOH solution after adding another 2 mL NaOH solution 4.11-4.48 t44.51 buffer after adding 2 mL 0.100 M NaOH solution after adding another 2 mL NaOH solution Describe how the three solutions differ in their...
please solve the calculation page
DATA SHEET: PH, BUFFERS AND K, Part 1: The Titration of a STRONG ACID (HCI) with NaOH using pH meter a) pH of 25 mL distilled water 5.65 (Measure volume with graduated cylinder) b) pH of 25 mL distilled water with 1 drop 1.0 M HCI 2.92 c) pH of 25 mL distilled water with 10 drops 1.0 M HCI (Note: (H') in 2c is about 10 times that of 2b) 1.10 d) Titration of...
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