PKA 3 POTENSIOMETRI
13
PERHITUNGAN 1. Penentuan Titik Akhir Titrasi Reaksi Netralisasi dengan indikator (hanya diperoleh titik akhir titrasi, bukan titik ekuivalen titrasi ) a. H3PO4 + NaOH Paramete r indikator metil merah fenolftalein x1 x2 x x±s x1 x2 x x±s volume (ml) 6.6 6.6 6.6 6.6 ± 0 12.8 11.8 12.3 12.3 ± 0,707 Ph 8.36 8.48 8.42 8.420 ± 0.085 5.72 5.74 5.73 5.73 ± 0,014 E - 107.5 -115.1 -111.3 -111.3 ± 5.374 51.2 48 49.6 49.6 ± 2,263 Paramete r Indikator metil merah fenolftalein x1 x2 x x±s x1 X2 x x±s volume (ml) 14.1 14.3 14.2 14.2 ± 0.141 7.7 7.6 7.65 7.65 ± 0.071 Ph 5.32 5.26 5.29 5.29 ± 0.042 8.35 8.48 8.415 8.415 ± 0.092 E 73.2 76.2 74.7 74.7 ± 2.121 - 107.1 -115.2 - 111.1 5 111.2 ± 5.727 b. Na3PO4 + HCl 2. Penentuan Titik Ekivalen Reaksi Netralisasi secara Potensiometri (untuk menentukan titik ekivalen titrasi) a. H3PO4 + NaOH volum e Ph1 Ph2 pHr E1 E2 Er 0 1.97 1.99 1.98 267.2 265.8 266.5 1 2.04 2.13 2.085 262.9 258.7 260.8 2 2.19 2.26 2.225 254.2 250.5 252.35 3 2.34 2.42 2.38 245.5 241.4 243.45 4 2.54 2.62 2.58 233.8 228.2 231 5 2.81 2.94 2.875 217.4 210 213.7 6 3.38 3.83 3.605 183.5 157.2 170.35 7 5.96 6.14 6.05 30.5 19.5 25 8 6.44 6.52 6.48 1.6 -2.8 -0.6 9 6.73 6.86 6.795 -15.8 -19.8 -17.8 10 7.01 7.08 7.045 -32.2 -36.3 -34.25 11 7.23 7.4 7.315 -48.5 -55.4 -51.95 12 7.7 7.03 7.365 -73.2 -87.4 -80.3 13 9.84 10.53 10.185 -201.1 -242.5 -221.8
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Transcript of PKA 3 POTENSIOMETRI
PERHITUNGAN
1. Penentuan Titik Akhir Titrasi Reaksi Netralisasi dengan indikator (hanya diperoleh titik akhir titrasi, bukan titik ekuivalen titrasi )a. H3PO4 + NaOH
Parameterindikator
metil merah fenolftaleinx1 x2 x x±s x1 x2 x x±s
volume (ml) 6.6 6.6 6.6 6.6 ± 0 12.8 11.8 12.3 12.3 ± 0,707Ph 8.36 8.48 8.42 8.420 ± 0.085 5.72 5.74 5.73 5.73 ± 0,014E -107.5 -115.1 -111.3 -111.3 ± 5.374 51.2 48 49.6 49.6 ± 2,263
ParameterIndikator
metil merah fenolftaleinx1 x2 x x±s x1 X2 x x±s
volume (ml) 14.1 14.3 14.2 14.2 ± 0.141 7.7 7.6 7.65 7.65 ± 0.071Ph 5.32 5.26 5.29 5.29 ± 0.042 8.35 8.48 8.415 8.415 ± 0.092E 73.2 76.2 74.7 74.7 ± 2.121 -107.1 -115.2 -111.15 111.2 ± 5.727
b. Na3PO4 + HCl
2. Penentuan Titik Ekivalen Reaksi Netralisasi secara Potensiometri (untuk menentukan titik ekivalen titrasi)a. H3PO4 + NaOH
volume Ph1 Ph2 pHr E1 E2 Er0 1.97 1.99 1.98 267.2 265.8 266.51 2.04 2.13 2.085 262.9 258.7 260.82 2.19 2.26 2.225 254.2 250.5 252.353 2.34 2.42 2.38 245.5 241.4 243.454 2.54 2.62 2.58 233.8 228.2 2315 2.81 2.94 2.875 217.4 210 213.76 3.38 3.83 3.605 183.5 157.2 170.357 5.96 6.14 6.05 30.5 19.5 258 6.44 6.52 6.48 1.6 -2.8 -0.69 6.73 6.86 6.795 -15.8 -19.8 -17.8
10 7.01 7.08 7.045 -32.2 -36.3 -34.2511 7.23 7.4 7.315 -48.5 -55.4 -51.9512 7.7 7.03 7.365 -73.2 -87.4 -80.313 9.84 10.53 10.185 -201.1 -242.5 -221.814 10.89 11.03 10.96 -263.3 -272.3 -267.815 11.22 11.25 11.235 -283.4 -285.5 -284.4516 11.4 11.44 11.42 -294.2 -296.9 -295.5517 11.55 11.58 11.565 -303 -305.2 -304.118 11.68 11.69 11.685 -310.8 -312.2 -311.519 11.79 11.79 11.79 -317.2 -317 -317.120 11.88 11.87 11.875 -322.9 -322.8 -322.8521 11.95 11.95 11.95 -326.8 -327.4 -327.122 12.02 12.01 12.015 -331.2 -331.3 -331.2523 12.07 12.06 12.065 -334.3 -334.2 -334.25
volume pHr V’ V”0 1.98
0.5 0.1051 2.085 1 0.035
1.5 0.142 2.225 2 0.015
2.5 0.1553 2.38 3 0.045
3.5 0.24 2.58 4 0.095
4.5 0.2955 2.875 5 0.435
5.5 0.736 3.605 6 1.715
6.5 2.4457 6.05 7 -2.015
7.5 0.438 6.48 8 -0.115
8.5 0.3159 6.795 9 -0.065
9.5 0.2510 7.045 10 0.02
10.5 0.2711 7.315 11 -0.22
11.5 0.0512 7.365 12 2.77
12.5 2.8213 10.185 13 -2.045
13.5 0.77514 10.96 14 -0.5
14.5 0.27515 11.235 15 -0.09
15.5 0.18516 11.42 16 -0.04
16.5 0.14517 11.565 17 -0.025
17.5 0.1218 11.685 18 -0.015
18.5 0.10519 11.79 19 -0.02
19.5 0.08520 11.875 20 -0.01
20.5 0.07521 11.95 21 -0.01
21.5 0.06522 12.015 22 -0.015
22.5 0.0523 12.065
Volume Er V’ V”
0 266.50.5 5.7
1 260.8 1 -2.751.5 8.45
2 252.35 2 -0.452.5 8.9
3 243.45 3 -3.553.5 12.45
4 231 4 -4.854.5 17.3
5 213.7 5 -26.055.5 43.35
6 170.35 6 -1026.5 145.35
7 25 7 119.757.5 25.6
8 -0.6 8 8.48.5 17.2
9 -17.8 9 0.759.5 16.45
10 -34.25 10 -1.2510.5 17.7
11 -51.95 11 -10.6511.5 28.35
12 -80.3 12 -113.1512.5 141.5
13 -221.8 13 95.513.5 46
14 -267.8 14 29.3514.5 16.65
15 -284.45 15 5.5515.5 11.1
16 -295.55 16 2.5516.5 8.55
17 -304.1 17 1.1517.5 7.4
18 -311.5 18 1.818.5 5.6
19 -317.1 19 -0.1519.5 5.75
20 -322.85 20 1.520.5 4.25
21 -327.1 21 0.121.5 4.15
22 -331.25 22 1.1522.5 3
23 -334.25
Penentuan titik ekuivalen potensiometer (Vpotensiometer) dan Vkoreksi
0 5 10 15 20 25
-3
-2
-1
0
1
2
3
4
1.715
-2.015
2.77
-2.045
Grafik V'' vs Δ(ΔpHr/ΔV)
V"
Δ(Δp
Hr/
ΔV)
V koreksi 0.4598 0.5753Vpotensiometer 10.7498 33.8153
b. Na3PO4 + HCl
volume Ph1 Ph2 pHr E1 E2 Er0 12.02 11.93 11.975 -324.8 -320.9 -322.851 11.9 11.84 11.87 -318.8 -315.5 -317.152 11.77 11.74 11.755 -310.3 -310.2 -310.253 11.64 11.61 11.625 -303 -301.6 -302.34 11.48 11.44 11.46 -293.4 -291.8 -292.6
5 11.27 11.25 11.26 -281.2 -280.3 -280.756 11.03 10.92 10.975 -266.9 -260.7 -263.87 10.43 10.06 10.245 -231.4 -209.7 -220.558 8.1 7.91 8.005 -92.3 -80.8 -86.559 7.52 7.36 7.44 -58.2 -48.7 -53.45
10 7.5 7.08 7.29 -38.7 -31.7 -35.211 6.92 6.84 6.88 -22.2 -17.3 -19.7512 6.67 6.6 6.635 -7.2 3.2 -213 6.4 6.26 6.33 8.7 17.2 12.9514 5.97 5.7 5.835 33.7 50.1 41.915 3.64 3.41 3.525 173.8 187.3 180.5516 2.98 2.88 2.93 213.5 219.2 216.3517 2.71 2.65 2.68 229.4 233.4 231.418 2.51 2.47 2.49 241.1 243.8 242.4519 2.38 2.35 2.365 248.8 251 249.920 2.25 2.24 2.245 256.7 257.5 257.121 2.16 2.15 2.155 262.2 263.4 262.822 2.07 2.05 2.06 267.8 268.7 268.2523 1.99 1.98 1.985 272.2 273.2 272.724 1.993 1.92 1.9565 275.9 276.6 276.25
volume pHr V’ V”0 11.975
0.5 0.1051 11.87 1 0.01
1.5 0.1152 11.755 2 0.015
2.5 0.133 11.625 3 0.035
3.5 0.1654 11.46 4 0.035
4.5 0.25 11.26 5 0.085
5.5 0.2856 10.975 6 0.445
6.5 0.737 10.245 7 1.51
7.5 2.248 8.005 8 -1.675
8.5 0.5659 7.44 9 -0.415
9.5 0.1510 7.29 10 0.26
10.5 0.4111 6.88 11 -0.165
11.5 0.24512 6.635 12 0.06
12.5 0.305
13 6.33 13 0.1913.5 0.495
14 5.835 14 1.81514.5 2.31
15 3.525 15 -1.71515.5 0.595
16 2.93 16 -0.34516.5 0.25
17 2.68 17 -0.0617.5 0.19
18 2.49 18 -0.06518.5 0.125
19 2.365 19 -0.00519.5 0.12
20 2.245 20 -0.0320.5 0.09
21 2.155 21 0.00521.5 0.095
22 2.06 22 -0.0222.5 0.075
23 1.985 23 -0.046523.5 0.0285
24 1.9565
volume Er V’ V”0 -322.85
0.5 5.71 -317.15 1 1.2
1.5 6.92 -310.25 2 1.05
2.5 7.953 -302.3 3 1.75
3.5 9.74 -292.6 4 2.15
4.5 11.855 -280.75 5 5.1
5.5 16.956 -263.8 6 26.3
6.5 43.257 -220.55 7 90.75
7.5 1348 -86.55 8 -100.9
8.5 33.19 -53.45 9 -14.85
9.5 18.2510 -35.2 10 -2.8
10.5 15.45
11 -19.75 11 2.311.5 17.75
12 -2 12 -2.812.5 14.95
13 12.95 13 1413.5 28.95
14 41.9 14 109.714.5 138.65
15 180.55 15 -102.8515.5 35.8
16 216.35 16 -20.7516.5 15.05
17 231.4 17 -417.5 11.05
18 242.45 18 -3.618.5 7.45
19 249.9 19 -0.2519.5 7.2
20 257.1 20 -1.520.5 5.7
21 262.8 21 -0.2521.5 5.45
22 268.25 22 -122.5 4.45
23 272.7 23 -0.923.5 3.55
24 276.25
Penentuan titik ekuivalen potensiometer (Vpotensiometer) dan Vkoreksi
0 5 10 15 20 25
-2-1.5
-1-0.5
00.5
11.5
22.5
1.51
-1.675
1.815
-1.715
Grafik V'' vs Δ(ΔpHr/ΔV)
V"
Δ(Δp
Hr/
ΔV)
Vkoreksi 0.4741 0.5142Vpotensiometer 11.0441 25.9242
GRAFIK H3PO4 + NaOH
0 5 10 15 20 25
-400
-300
-200
-100
0
100
200
300
0
2
4
6
8
10
12
14
Grafik V vs Er dan V vs pHr
ErpHr
V
0 5 10 15 20 250
20
40
60
80
100
120
140
160
0
0.5
1
1.5
2
2.5
3
Grafik V' vs ΔEr/ΔV dan V' vs ΔpHr/ΔV
ErpHr
V'
0 5 10 15 20 25
-150
-100
-50
0
50
100
150
-3
-2
-1
0
1
2
3
4
Grafik V'' vs Δ (ΔEr/ΔV) dan V'' vs Δ (ΔpHr/ΔV)
ErpHr
V"
GRAFIK Na3PO4 + NaOH
0 5 10 15 20 25 30
-400
-300
-200
-100
0
100
200
300
400
0
2
4
6
8
10
12
14
Grafik V vs Er dan V vs pHr
ErpHr
Axis Title
0 5 10 15 20 250
20
40
60
80
100
120
140
160
0
0.5
1
1.5
2
2.5
Grafik V' vs ΔEr/ΔV dan V' vs ΔpHr/ΔV
ErpHr
Axis Title
0 5 10 15 20 25
-150
-100
-50
0
50
100
150
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
2.5
Grafik V'' vs Δ (ΔEr/ΔV) dan V'' vs Δ (ΔpHr/ΔV)
ErpHr
Axis Title
