Los angeles trade technology

Los Angeles Trade Technology College

Chemical Technology Program

Courses: Chemical Technology 131- 142

Project Team

Group: No2

Clarence McKelry

Dynicia Braxton

Rodney Pujada

Robert Thomas

Submission Date: Monday 10th, 2010

1

Contents

1. pH Analysis 3

2. Total Dissolved Solid Dried at 180 ⁰C 4

3. Total Suspended Solids Dried at 103-105 ⁰C 6

4. Chlorine Analysis 9

5. Determination of Sulfate 12

6. Oil & Grease Analysis 18

7. Hardness Analysis 21

8. Sewage Water Analysis 23

1. Title : pH Analysis

1.1. Method#: 4500-H+ A. pH Value

1.2. Analytes:

Sample ID#: A-7543-b

Sample ID#: B - 1500

Sample ID#: B – 1214-0

Sample ID#: F – 882-32

Sample ID#: C – 222-4

1.3. Date Due: Wednesday, April 14th, 2010

1.4. Prepared by: Dynicia and Clarence

1.5. Objective: To determine pH liquid unknown sample.

1.6. Data Analysis:

Sample ID# pH Color

A-7543 -b 2.56 Colorless

B-1500 5.58 Colorless

B-1214-0 2.56 Colorless

F-882-3 6.99 Colorless

C-222-4 3.12 Colorless

duplicate

1.7. Conclusion

All of samples are acid and colorless

3

2. Title: Total Dissolved Solid Dried at 180 ⁰ C

2.1 Method#: 2540 C. Total Dissolved Solid Dried at 180 ⁰C

2.2 Analytes:






Sample ID#: A – 3614

2.3 Date Due: Wednesday, April 21th, 2010

2.4 Prepared by: Rodney and Clarence

2.5 Objective: Determine the concentration of total suspended solid in

each samples.

2.6 The Sample Handling and Preservation

a) Preserve by refrigeration at 4 ⁰C

b) The maximum holding for samples is 28 days

2.7 Data Analysis

Table No 1: Experimental Data

4/19/2010 4/19/2010 4/19/2010 4/20/2010 4/21/2010

Sample ID# Dish empty 7:30 AM 9:45 AM 9:00 AM 9:00 AMDish with

sample

grams reference(gr) W1(gr) W2 (gr) W3 (gr) Average(W1,W2,W3)

A-7543-b 58.9607 58.9649 58.9640 58.9637 58.9638 58.9638

B-1500 58.4378 58.4427 58.4405 58.4399 58.4393 58.4399

B-1214-0 73.3920 73.3945 73.3910 73.3911 73.3901 73.3907

F-882-3 72.5863 72.5627 72.5618 72.5620 72.5642 72.5627

C-222-4 66.4562 66.4721 66.4709 66.4682 66.4671 66.4687

A-3614 68.1818 66.1852 66.1835 66.1830 66.1830 66.1832

A-7543-b

Duplicate 68.1215 68.1221 68.1200 66.1198 68.1193 67.4530

4

Table No 2: Result of gravimetric measures

B A (A-B) mg/Lt

Sample ID# Dish empty

Dish with

sample Gravimetric Difference to 25 mL

mgAverage(W1,W2,W3)

mg (B-A)/0.025

A-7543-b 58960.7 58963.8 3.1333 125.3

B-1500 58437.8 58439.9 2.1000 84.0

B-1214-0 73392.0 73390.7 -1.2667 -50.7

F-882-3 72586.3 72562.7 -23.6333 -945.3

C-222-4 66456.2 66468.7 12.5333 501.3

A-3614 68181.8 66183.2 -1998.6333 -79945.3

A-7543-b

Duplicate 68121.5 67453.0 -668.4667 -26738.7

2.8 Calculations

a) Calculating total dissolved solids concentration:

A = weight of dried residue + dish, mg

B = weight of dish, mg

For Sample ID#: A-7543-b

A = 58.9638

B = 58.9607

mg Dissolved solids/L = (58.9638 - 58.9607)x1000

25 mL sample

mg Dissolved solids/L = 125.3

2.9 Conclusion

We made a mistakes in samples: 5

mg Dissolved solids/L = ( A – B )x1000mL sample




Duplicate Sample ID#: A-7543-b

3. Title : Total Suspended Solids Dried at 103-105 ⁰ C

3.1 Method#: 2540 D. Total Suspended Solids Dried at 103 ⁰c

3.2 Analytes:








3.4 Prepared by: Rodney and Clarence

3.5 Objective: To determine the concentration of total suspended solid

in the unknown samples.


a) Preserve by refrigeration at 4 C


3.7 Data Analysis

Table No 1: Experimental Data

4/15/2010 4/15/2010 4/15/2010 4/15/2010Gooch with

sample

Sample IDGooch empty

+filter 9:30 AM 10:00 AM 10:30 AM Average (g)

grams W1(g) W2(g) W3(g.)Average(W1,W2,W3)

A-7543-b 19.0563 19.0487 19.0471 19.0473 19.04776

F-882-3 18.5164 18.5158 18.5143 18.5143 18.5148

B-1500 17.6503 17.6391 17.6390 17.6370 17.6384

C-222-4 17.2329 17.2332 17.2332 17.2325 17.2330

A-7543-b

Duplicate 17.0224 17.3989 17.3989 17.3985 17.3988

A-3614 18.8490 18.8482 18.8479 18.8491 18.8484

B-1214-0 18.5200 18.5206 18.5206 18.5204 18.5205

Table No 2: Result of gravimetric measures

B A (A-B) mg/Lt

Sample ID Dish empty

Dish with

sample Gravimetric

Difference to 25 mL

mgAverage(W1,W2,W3)

mg (B-A)/0.025

A-7543-b 19056.3 19047.7 -8.6 -344.0

F-882-3 18516.4 18514.8 -1.6 -64.0

B-1500 17650.3 17638.4 -11.9 -477.3

C-222-4 17232.9 17233.0 0.1 2.7

A-7543-b

Duplicate 17022.4 17398.8 376.4 15054.7

A-3614 18849.0 18848.4 -0.6 -24.0

B-1214-0 18520.0 18520.5 0.5 21.3

3.8 Calculation

a) Calculating total suspended solids concentration:

A = weight of dried residue + gooch crucible, mg

7

mg suspended solids/L = ( A – B )x1000mL sample

B = weight of gooch crucible, mg

For Sample ID#: A-7543-b

A = 58.9638

B = 58.9607

mg Dissolved solids/L = (19047.7 -19056.3)x1000

25 mL sample

mg Dissolved solids/L = -344.0

3.9 Conclusion

We made a mistake in sample

Sample ID#: A-7543-b and duplicate




4. Title: Chlorine Analysis

4.1 Method#: 4500-Cl- C. Mercuric Nitrate Method

4.2 Analytes:






4.3 Prepared by: Clarence and Robert


4.5 Objective: Chloride determination by titration with mercury




4.7 Data Analysis

Table No 1 : Volume of Mercuric Nitrate

8

Sample IDTitrant Volume

(mL)

A-7543-b 0.70 B - 1500 3.30

B – 1214-0 4.30C – 222-4 2.00A – 3614 0.70C – 222-4 Duplicate 2.00

Table No2: Calculating chloride concentration in samples

Sample ID Titrant Volume (mL)

Titrant (Mercuric Nitrate)

Concentration(N)

Titrated Volumen (mL)

Chloride Concentration

(g/L)

A-7543-b 0.70 0.0141 50 7.00

B - 1500 3.30 0.0141 50 32.99

B – 1214-0 4.30 0.0141 50 42.99

C – 222-4 2.00 0.0141 50 19.99

A – 3614 0.70 0.0141 50 7.00

C – 222-4 Duplicate 2.00 0.0141 50 19.99

4.8 Calculation

Prepared Hg(NO3)2 Concentration = 0.0141 N

Where:

A = mL of titrant (mercuric nitrate) for sample

B = mL of titrant (mercuric nitrate) for blank

N = normality of mercuric nitrate titrated concentration = 0.0141 N

For sample A- 7543-b

mg/L Cl = (0.70 – 0.01) x 0.0141 x 35.450

50 mL sample

9

mg/L Cl = (A – B) x N x 35.450 mL sample

mg/L Cl = 7.00 mg/Cl

10

5. Title: Determination of Sulfate

5.1 Method# : 4500-SO42- E. Turbidimetric Method

5.2 Analytes:




5.3 Prepared by: Rodney

5.4 Date Due: Tuesday, April 27th, 2010

5.5 Objective: To determine the sulfate concentration by comparison by

reading with a standard curve.

5.6 Summary of Method:

a) Sulfate ion is converted to a barium sulfate suspension under

controlled conditions.

b) The resulting turbidity is determined by spectrophotometer and

compared to a calibration curve prepared from standard sulfate

conditions.




5.8 Data Analysis

Table No 1 Sulfate Calibration Curve

Concentration Absorbance

mg/L

0 0

10 0.06

20 0.12

30 0.18

40 0.25

11

Table No 2 Sample Calibration Curve

Sample ID Absorbance

F-882-3 0.01

F-882-3

Duplicate 0.01

A-3614 0.56

B-1214-0 0.75

5.9 Graphic

a) Standard Calibration Curve

12

b) Sample Calibration Curve

13

5.10 Calculation

a) Calculating volumes (mL) for standard concentration:

Prepared Na2SO4 149.7 mg/1LPrepared dilution of 10, 20, 30, 40 mg/L

Where:

C1 = sulfate concentration = 149.7 mg/LV1 = unknown volume in mLC2 = sulfate dilution concentration = 10 mg/1LV2 = volume of dilution concentration (10 mg/L) = 100 mL

V1 = (C2*V2) / C1V1 = 6.68 mL

b) Calculating sample

concentration by Calibration Curve

Sample ID Concentration Absorbance

mg/L

0 0

F-882-3 1.64 0.01

10 0.06

20 0.12

30 0.18

40 0.25

A-3614 91.80 0.56

B-1214-0 122.95 0.75

14

Concentration

volume for

dilution

mg/L mL

10 6.68

20 13.36

30 20.04

40 26.7

C1*V1 = C2*V2

5.11 Conclusion

We need to prepared new concentration of standard near to the

concentrations of samples. 100mg/L and 90mg/L

15

6. Title : Oil & Grease Analysis

6.1 Method#: 5520 B. Partition Gravimetric Method

6.2 Analytes:



6.3 Prepared by: Robert and Rodney

6.4 Date Due: Thursday, May 6th, 2010

6.5 Objective: To determine the dissolved or emulsified oil and grease

in unknown samples by using partition gravimetric method.



b) If analysis is delayed for more than a few days, the sample is

acidified with 5 mL of 1:1 HCl

c) Do not exceed the recommended holding time of 28 days

6.7 Data Analysis

Table No 1Gravimetric difference of Standard

ID Sample DateSample Amount Used (L)

Wt of empty

flask (g)

wt of flask w/sample

(g)

(Wt of flask w/sample- Wt. of empty flask)

(mg)

Concentration Oil & Grease

(mg/L)% Recovery

Standard 4/24/2010 1.00 80.4534 81.2052 751.80 751.80 75 %Standard 4/26/2010 1.00 102.5927 103.5560 963.30 963.30 96 %

Table No 2 Gravimetric difference for samples

16

ID SampleSample Amount Used (L)

Wt of empty flask (g)

wt of flask w/sample (g)

wt of flask w/sample (g) Average

(Wt of flask w/sample-

Wt. of empty flask) (mg)

Concentration Oil & Grease

(mg/L)

W1 W2 W3Average(W1,W2,W3

)

Standard 1.00 102.5927 103.5560 103.5560 103.5560 963.30 963.3

A-41202 0.97 105.2265 106.6334 106.6334 106.6334 106.6334 1406.95 1450.5

A-41201 0.97 106.8300 107.2046 107.2046 107.2046 107.2046 374.60 386.2

6.8 Calculation

For Sample A- 41202

Grease and oil, mg/L = (R-B) x 1000

mL sample

R = 106.6334 g = 106633.4 mg

B = 105.2265 g= 105226.5 mg

Grease and oil, mg/L = (106633.4 mg - 105226.5 mg ) x 1000

970 mL sample

Grease and oil, mg/L = 1450.5 mg/L

17

7. Title: Hardness Analysis

7.1 Method#: 2340 C. EDTA Titrimetric Method

7.2 Analytes:







7.3 Prepared by: Dynicia

7.4 Date Due: Thursday, April 22th, 2010

7.5 Objective: To determine hardness by EDTA titrimetric method.




7.7 Data Analysis

Table No 1

Sample IDTitrant Volume

(mL)

Titrant Volume

(mL)

Titrant (EDTA) Concentration(M)

Titrated Volumen (mL)

CaCO3 Concentration

(mg/L)

CaCO3 Concentration

(mg/L)

Run N1 RunN2 A-7543-b 1.80 1.80 0.01 0.025 0.7200 0.7200 B - 1500 3.61 13.40 0.01 0.025 1.4440 5.3600

B – 1214-0 5.00 4.90 0.01 0.025 2.0000 1.9600F-882-3 0.01 0.61 0.01 0.025 0.0040 0.2440

C – 222-4 3.20 4.51 0.01 0.025 1.2800 1.8040A – 3614 7.81 28.50 0.01 0.025 3.1240 11.4000A-7543-b Duplicate

2.41 4.60 0.01 0.025 0.9640 1.8400

Blank 0.01 0.01 0.01 0.025 0.0040 0.0040

Table No 2

18

Sample IDCaCO3

Concentration (mg/L)

A-7543-b 0.7200 B - 1500 5.3600

B – 1214-0 1.9600F-882-3 0.2440

C – 222-4 1.8040A – 3614 11.4000

A-7543-b Duplicate 1.8400Blank 0.0040

7.8 Calculation

Hardness (EDTA),as mg CaCO3/L = A x B x 1000

mL sample

Where

A = mL titration for sample and

B = mg CaCO3, equivalent to 1.00 mL EDTA titrant

For sample A-7543-b

Hardness (EDTA),as mg CaCO3/L = 1.80 mL x 0.01 x 1000

25 mL sample

Hardness (EDTA),as mg CaCO3/L = 0.72 mg CaCO3/L

8. Title : Setteable Solids

8.1 Method#: 2540 F Settleable Solids

8.2 Analyte: Filtrated water Sample ID –G445-0

8.3 Prepared by: Robert

8.4 Date Due: Thursday, April 22th, 2010

8.5 Objective: To determine settleable solids in water.

8.6 Data Analysis: Volume = 31mL

19