drill: a 0.100 m solution of hz ionizes 20.0 %. calculate: k ahz
TRANSCRIPT
![Page 1: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/1.jpg)
Drill: A 0.100 M solution of HZ ionizes 20.0 %.Calculate: KaHZ
![Page 2: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/2.jpg)
DistributeMake-UpTitration
Labs
![Page 3: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/3.jpg)
Return& Review
Tests
![Page 4: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/4.jpg)
CHM II HW•Review PP-23
•Complete the attached assignment & turn it in on Monday
![Page 5: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/5.jpg)
Buffer Solutions
![Page 6: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/6.jpg)
Buffer Solution
•A solution that resists changes in
pH
![Page 7: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/7.jpg)
Buffer Solution•Made from the combination of a weak acid & its
salt
![Page 8: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/8.jpg)
Buffer Solution•Made from the combination of a weak base & its
salt
![Page 9: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/9.jpg)
Buffer Examples•Mix acetic acid &
sodium acetate
•Mix ammonia & ammonium chloride
![Page 10: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/10.jpg)
Buffer Solution•A buffer solution
works best when the acid to salt ratio is
1 : 1
![Page 11: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/11.jpg)
Buffer Solution•A buffer solution
works best when the base to salt ratio is
1 : 1
![Page 12: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/12.jpg)
Buffer Solution•The buffering capacity of a solution works best when the pH is near the
pKa
![Page 13: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/13.jpg)
pKa or pKb
•pKa = - log Ka
•pKb = - log Kb
![Page 14: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/14.jpg)
BufferEquilibria
![Page 15: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/15.jpg)
Buffer Problems•Calculate the pH of a
solution containing
0.10 M HAc in 0.10 M NaAc: Ka = 1.8 x 10-5
![Page 16: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/16.jpg)
AP CHM HW•Problem: 9
•Page: 421
![Page 17: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/17.jpg)
CHM II HW•Problem: 11
•Page: 818
![Page 18: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/18.jpg)
Buffer Problems•Calculate the pH of
0.10 M NH3 in
0.20 M NH4NO3:
• Kb = 1.8 x 10-5
![Page 19: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/19.jpg)
Buffer ProblemsCalculate the pH of a
solution containing
0.10 M HBz in 0.20 M NaBz: Ka = 6.4 x 10-5
![Page 20: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/20.jpg)
Drill:Calculate the pH of a
solution containing
0.30 M HZ in 0.10 M NaZ: Ka = 3.0 x 10-5
![Page 21: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/21.jpg)
Review Drill&
Check HW
![Page 22: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/22.jpg)
All who were absent for the
Titration Lab need to get a make-up
lab.
![Page 23: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/23.jpg)
The Titration Lab is due Wednesday
![Page 24: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/24.jpg)
Anyone who wants to retake the last test
should see me to make arrangements
to make it up.
![Page 25: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/25.jpg)
Anyone who has missed a previous
test should also see me to make
arrangements to make it up.
![Page 26: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/26.jpg)
CHM II HW•Review PP-23
•Complete the attached assignment & turn it in tomorrow.
![Page 27: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/27.jpg)
Buffer ProblemCalculate the pH of a
solution containing
0.50 M R-NH2 in 0.10 M R-NH3I: Kb = 4.0 x 10-5
![Page 28: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/28.jpg)
HA H+ + A-
[H+][A-]
[HA]Ka =
![Page 29: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/29.jpg)
HA H+ + A-
[Ka][HA]
[A-][H+]=
![Page 30: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/30.jpg)
HA H+ + A-
[HA]
[A-][H+] = (Ka)
![Page 31: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/31.jpg)
pH =
[HA]
[A-]pKa - log
![Page 32: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/32.jpg)
Henderson-Hasselbach Eq
[A-]
[HA]pH = pKa + log
![Page 33: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/33.jpg)
Henderson-Hasselbach Eq
[B+]
[B]pOH = pKb+ log
![Page 34: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/34.jpg)
Buffer Problems•Calculate the salt to acid
ratio to make a buffer solution with pH = 5.0
•Ka for HBZ = 2.0 x 10-5
![Page 35: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/35.jpg)
Equivalence PointPoint at which the # of moles of the two
titrants are equal
![Page 36: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/36.jpg)
Titration Curves
![Page 37: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/37.jpg)
0
2
4
6
8
10
12
14
0.00 10.00 20.00 30.00 40.00 50.00
![Page 38: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/38.jpg)
AP CHM HW•Read: Chapter 14
•Problem: 23
•Page: 421
![Page 39: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/39.jpg)
CHM II HW•Read: Chapter 19
•Problem: 21
•Page: 819
![Page 40: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/40.jpg)
Buffer ProblemsCalculate the salt to base
ratio to make a buffer solution with pH = 9.48
• Kb for MOH = 2.0 x 10-5
![Page 41: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/41.jpg)
Drill:Calculate the pH of a buffer solution containing 0.50 M HX in 0.25 M KX.
Ka = 2.5 x 10-5
![Page 42: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/42.jpg)
Test
•Friday
![Page 43: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/43.jpg)
0
2
4
6
8
10
12
14
0 20 40 60 80 100
[H2A] = [HA-]
[H2A] = [OH-]
[HA-] = [A-2]
[OH-] = [A-2]
![Page 44: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/44.jpg)
Calculate the HCO3- to
H2CO3 ratio in blood with pH = 7.40
•Ka1 for H2CO3 = 4.4 x 10-7
![Page 45: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/45.jpg)
150 ml of 0.10 M NaOH is added to 100.0 ml of 0.10 M H2CO3. Calculate pH.
• Ka1 for H2CO3 = 4.4 x 10-7
• Ka2 for H2CO3 = 4.8 x 10-11
![Page 46: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/46.jpg)
AP CHM HW•Read: Chapter 14
•Problem: 33
•Page: 422
![Page 47: Drill: A 0.100 M solution of HZ ionizes 20.0 %. Calculate: K aHZ](https://reader036.vdocuments.net/reader036/viewer/2022062421/56649dda5503460f94acffcf/html5/thumbnails/47.jpg)
CHM II HW•Read: Chapter 19
•Problem: 31
•Page: 819