Unknown: G
Experiment 1
KHP Titration
KHP Collected: 0.3314 g
0.1000 𝑀 𝑁𝑎𝑂𝐻 × 16.31 𝑚𝐿 𝑁𝑎𝑂𝐻 ×
1𝐿
1 𝑚𝑜𝑙 𝐾𝐻𝑃
204.23 𝑔 𝐾𝐻𝑃
×
×
= 𝟎. 𝟑𝟑𝟑𝟏 𝒈 𝑲𝑯𝑷
1000 𝑚𝐿
1 𝑚𝑜𝑙 𝑁𝑎𝑂𝐻
1 𝑚𝑜𝑙 𝐾𝐻𝑃
KHP Weight from graph: 0.3331 g
| 0.3331 − 0.3314 |
× 100 = 𝟎. 𝟓𝟏𝟑𝟎%
0.3314
Percent error: 0.5130 %
Na2CO3 Titration
Na2CO3 Collected: 0.1049 g
0.1000 𝑀 𝐻𝐶𝑙 × 20.18 𝑚𝐿 𝐻𝐶𝑙 ×
1𝐿
1 𝑚𝑜𝑙 𝑁𝑎2 𝐶𝑂3
105.99 𝑔 𝑁𝑎2 𝐶𝑂3
×
×
= 𝟎. 𝟏𝟎𝟔𝟗 𝒈 𝑵𝒂𝟐 𝑪𝑶𝟑
1000 𝑚𝐿
2 𝑚𝑜𝑙 𝐻𝐶𝑙
1 𝑚𝑜𝑙 𝑁𝑎2 𝐶𝑂3
Na2CO3 Weight from graph: 0.1069 g
| 0.1069 − 0.1049 |
× 100 = 𝟏. 𝟗𝟎𝟕%
0.1049
Percent error: 1.907 %
Unknown Titration
Unknown: G (if it was a number then it was 6 but I remember G on my specimen)
Trial 1
0.1000 𝑀 𝐻𝐶𝑙 × 8.93𝑚𝐿 ×
Trial #
1
2
3
Weight (g)
0.2221
0.2656
0.2413
1𝐿
1 𝑚𝑜𝑙 𝑁𝑎2 𝐶𝑂3
105.99 𝑔 𝑁𝑎2 𝐶𝑂3
×
×
= 0.04732 𝑔
1000 𝑚𝐿
2 𝑚𝑜𝑙 𝐻𝐶𝑙
1 𝑚𝑜𝑙 𝑁𝑎2 𝐶𝑂3
0.04732 𝑔
× 100 = 𝟐𝟏. 𝟑𝟏%
0.2221 𝑔
Trial 2
0.1000 𝑀 𝐻𝐶𝑙 × 10.90𝑚𝐿 ×
1𝐿
1 𝑚𝑜𝑙 𝑁𝑎2 𝐶𝑂3
105.99 𝑔 𝑁𝑎2 𝐶𝑂3
×
×
= 0.05776 𝑔
1000 𝑚𝐿
2 𝑚𝑜𝑙 𝐻𝐶𝑙
1 𝑚𝑜𝑙 𝑁𝑎2 𝐶𝑂3
0.05776 𝑔
× 100 = 𝟐𝟏. 𝟕𝟓%
0.2656 𝑔
Trial 3
0.1000 𝑀 𝐻𝐶𝑙 × 9.62𝑚𝐿 ×
1𝐿
1 𝑚𝑜𝑙 𝑁𝑎2 𝐶𝑂3
105.99 𝑔 𝑁𝑎2 𝐶𝑂3
×
×
= 0.05098 𝑔
1000 𝑚𝐿
2 𝑚𝑜𝑙 𝐻𝐶𝑙
1 𝑚𝑜𝑙 𝑁𝑎2 𝐶𝑂3
0.05098 𝑔
× 100 = 𝟐𝟏. 𝟏𝟑%
0.2413 𝑔
Unknown: G
Q- Test of % Na2CO3 (90%)
| 0.2175−0.2131 |
| 0.2175−0.2113 |
| 0.2131−0.2113 |
| 0.2175−0.2113 |
= 0.7097
= 0.2903
0.7097 < 0.94
0.2903 < 0.94
Fail to reject
Fail to reject
No outliers detected
Confidence Limit of % Na2CO3 (95% Confidence Level)
( |0.2140 − 0.2113| )2
( |0.2140 − 0.2131| )2
( |0.2140 − 0.2175| )2
SUM
= 7.290 × 10−6
= 8.100 × 10−7
= 1.225 × 10−5
= 2.035 × 10−5
𝑆= √
2.035 × 10−5
3−1
𝑆 = 3.190 × 10−3
𝐶𝐿 =
4.30 × 3.190 × 10−3
√3
𝐶𝐿 = 7.920 × 10−3
Average % Na2CO3 ± 95% C.L.= 21.40% ± 𝟕. 𝟗𝟐𝟎 × 𝟏𝟎−𝟑
*ALL TABLES AND GRAPHS CAN BE FOUND BELOW*
Unknown: G
KHP Titration with NaOH
12
10
Observed
Equivalence Point
8
pH
Indicator
6
4
Calculated
Equivalence Point
2
0
0
5
10
15
20
ml of NaOH
*see appendix one for table 2
Na2CO3 Titration with HCl
14
Observed
Equivalence Point
12
pH
10
Calculated
Equivalence Point
8
Calculated
Equivalence Point
6
Observed
Equivalence Point
Indicator
4
Indicator
2
0
0
5
10
15
ml of HCl added
*see appendix one for table 1
20
25
Unknown: G
Unknown Trial 1
12
Indicator
10
pH
8
Equivalence
Point 1
6
Indicator
4
Equivalence
Point 2
2
0
0
2
4
6
8
10
12
mL of HCl added
Unknown Trial 2
12
Indicator
10
pH
8
Indicator
Equivalence
Point 1
6
4
Equivalence
Point 2
2
0
0
2
4
6
8
10
12
mL of HCl added
Unknown Trial 3
12
10
Indicator
pH
8
Equivalence
Point 1
6
Indicator
4
Equivalence
Point 2
2
0
0
2
4
6
mL of HCl added
8
10
12
Unknown: G
Na2CO3 Titration
mL HCl
pH
0
11.58
1.91
11
2.91
10.8
3.91
10.59
4.91
10.39
5.91
10.21
6.91
10
7.41
9.88
7.91
9.77
8.46
9.6
8.91
9.44
9.12
9.32
9.32
9.23
9.62
9.05
9.71
8.96
9.78
8.89
9.83
8.82
9.91
8.74
10.02
8.54
10.23
8.3
10.41
7.95
10.91
7.54
11.91
7.02
13.01
6.8
14.11
6.6
15.01
6.45
15.91
6.31
16.91
6.14
17.43
6.02
17.72
5.98
18.07
6
18.37
5.93
18.68
5.86
18.97
5.77
19.17
5.73
19.34
5.62
19.37
5.59
19.57
5.54
19.73
5.39
19.8
5.25
19.87
5.19
19.97
5.18
20.07
5.09
20.11
4.93
20.18
4.74
20.28
4.55
20.32
4.36
20.37
4.05
20.42
3.82
20.46
3.56
20.51
3.35
20.57
3.29
20.67
3.2
20.8
3.17
21.07
2.48
21.27
2.32
21.37
2.22
21.97
2.05
22.17
1.99
KHP Titration
mL NaOH pH
0
4.29
1.84
4.57
2.96
4.76
4
4.9
4.96
5.02
6.04
5.13
7.06
5.23
7.94
5.32
8.76
5.41
9.95
5.52
10.45
5.57
11.47
5.69
12.34
5.8
12.84
5.88
13.04
5.9
13.2
5.92
13.36
5.95
13.55
5.98
13.74
6.01
13.87
6.04
14.06
6.08
14.23
6.11
14.36
6.14
14.55
6.18
14.7
6.24
15
6.32
15.15
6.38
15.26
6.43
15.38
6.48
15.42
6.44
15.51
6.5
15.62
6.59
15.73
6.67
15.76
6.71
15.82
6.75
15.92
6.89
15.97
6.97
16.03
7.12
16.12
7.55
16.22
8.46
16.24
8.59
16.31
9.16
16.44
9.61
16.51
9.96
16.57
10.19
16.8
10.54
16.92
10.62
17.02
10.7
17.21
10.81
17.34
10.9
17.61
10.99
17.93
11.09
18.93
11.32
19.82
11.42
21.97
11.59
Unknown Trial 1
mL of HCl pH
0
11.14
1.4
11.08
2.21
10.96
3.17
10.65
3.34
10.42
3.52
10.35
3.65
10.1
3.81
9.87
4.03
9.73
4.25
9.68
4.6
9.54
4.81
9.44
4.9
9.34
5.07
9.1
5.1
9.07
5.15
8.56
5.18
8.23
5.21
8.03
5.25
7.89
5.28
7.35
5.3
7.13
5.52
6.87
5.76
6.79
5.92
6.66
6.32
6.54
6.79
6.43
7.4
6.22
7.61
6.01
7.91
5.97
8.07
5.85
8.25
5.81
8.68
5.6
8.75
5.34
8.81
5.11
8.88
4.85
8.93
4.73
9
4.59
9.05
4.36
9.13
4.21
9.2
3.55
9.4
3.19
9.61
2.88
9.83
2.74
Unknown Trial 2
mL of HCl pH
0
11.08
0.4
10.95
0.9
10.79
1.4
10.64
1.7
10.55
1.89
10.49
2.1
10.43
2.35
10.34
2.6
10.27
2.8
10.2
2.95
10.15
3.18
10.07
3.4
9.99
3.6
9.92
3.8
9.86
4.01
9.76
4.3
9.68
4.5
9.53
4.6
9.48
4.71
9.43
4.8
9.35
4.9
9.29
5
9.21
5.11
9.1
5.21
8.95
5.31
8.79
5.41
8.65
5.5
8.52
5.6
8.08
5.7
7.99
5.77
7.93
5.83
7.72
5.9
7.52
6.1
7.35
6.25
7.2
6.45
7.04
6.68
6.97
6.82
6.89
7.02
6.84
7.42
6.71
7.61
6.61
7.81
6.56
7.96
6.5
8.09
6.47
8.25
6.44
8.5
6.42
8.58
6.38
8.78
6.34
9.1
6.24
9.4
6.15
9.5
6.07
10.02
6.02
10.25
5.87
10.35
5.79
10.6
5.63
10.63
5.49
10.8
5.2
10.88
4.72
10.9
4.27
10.93
3.86
11.05
3.42
11.2
3.18
11.3
3.04
11.45
2.89
11.5
2.84
Unknown Trial 3
mL of HCl pH
0
11.01
0.9
10.62
1.32
10.49
1.52
10.41
1.8
10.33
2.1
10.24
2.3
10.15
2.8
9.96
3.25
9.78
3.4
9.68
3.58
9.6
3.7
9.51
3.9
9.39
4
9.31
4.1
9.22
4.2
9.09
4.31
8.96
4.4
8.82
4.44
8.42
4.5
8.38
4.6
8.3
4.71
8.02
4.8
7.91
4.9
7.73
5
7.53
5.1
7.44
5.2
7.36
5.3
7.23
5.41
7.14
5.62
7.01
5.81
6.96
6.11
6.77
6.46
6.63
6.9
6.44
7.01
6.33
7.32
6.21
7.92
6.09
8.1
5.89
8.1
5.81
8.9
5.72
9.01
5.65
9.11
5.57
9.25
5.4
9.36
5.26
9.51
4.94
9.59
4.48
9.62
4.23
9.66
3.78
9.75
3.41
9.9
3.18
9.99
3.07
10.1
2.96
10.21
2.88
10.4
2.68