This website uses cookies to ensure you have the best experience. Learn more

Determination Of %Mgo In Unknown Essay

700 words - 3 pages

Determination of %MgO
using a Compleximetric Titration


The procedure for this experiment is taken from the laboratory manual referenced below. There were no significant deviations from that procedure.

Data Table
 Mass of Na2EDTA*2H2O _0.9864 g
Molar Mass of Na2EDTA*2H2O 372.25 g/mol
Estimated Morality of EDTA solution ____0.0088M_________________
Standardization of EDTA Solution
Concentration of Zn2+ 0.0112M
| Trial #1 | Trial #2 | Trial #3 |
Final Buret Reading | 10.50 ml | 9.20 ml | 26.50 ml |
Initial Buret reading | 3.00 ml | 2.00 ml | 18.50 ml |
Volume used, EDTA | 7.50 ml | 7.20 ml | 8.00 ml |
...view middle of the document...

12*10-4 mol EDTA/0.0075L EDTA = 0.0149M EDTA
 Determination of %MgO of Unknown
Using data from Sample #1
38.80ml EDTA – 0.00ml Blank = 38.80ml EDTA = 0.0388L EDTA
Moles of Mg2+ in a sample using average M EDTA and volume of EDTA:
(0.0148M EDTA) *(0.0388L EDTA) = 5.7424*10-4 mol EDTA = 5.7424*10-4 mol Mg2+
%MgO= (5.7424*10-4 mol Mg2+ )*(40.305 g/mol MgO)*(100)/0.2100g sample mass = 11.021%
 The average concentration of the EDTA solution was 0.0148M.
The average % MgO in unknown #1W was 11.5580%.
Measurements of blank DI water did not show a presence of metal ions.
Error Analysis: 
The most important source of error came from the buret readings. Adding EDTA solution too rapidly, offsets the correct amount of EDTA solution used in the titration and effects the deviations in %MgO calculations.
The expected molarity of EDTA solution based on the molar mass of the sample was 0.0088M. However, the value obtained from standardization of EDTA using Zn2+ was 0.0148M, about 5.6% deviation that also affects the results of %MgO determination leaving 94.4% confidence in...

Other Essays Like Determination of %Mgo in Unknown

Hess' Law Lab Essay

2585 words - 11 pages magnesium = (H reaction 2)+ (-H reaction 3)+(H reaction 4) Purpose: The purpose of the lab is to safely and accurately measure the molar enthalpy of combustion of magnesium by splitting up the reaction into 3 steps, determining the molar enthalpy per mole of Mg and MgO respectively, summing them up using Hess’ Law and thus confirming our hypothesis that Hess’ Law can be used to determine the change in molar enthalpy of a reaction by splitting it

Glass Tank Furnace Essay

773 words - 4 pages DESIGN OF A GLASS TANK FURNACE AIM- Design of a regenerative and fired glass tank furnace of 200ton per day capacity to produce a sheet glass using furnace oil as fuel melted at 1500oC. Given composition of the sheet glass- Sio2 Al2O3 CaO MgO R2O Fe2O3 71 0.4 9 3 16 0.6 DIFFERENT PARTS OF A GLASS TANK FURNACE. 1. Doghouse assembly 2. Melting end 3. Crown 4. Bridge 5. Conditioning and Refining end 6

Brucite Sand Maker Manufacturers

604 words - 3 pages for sale > Mobile Brucite Quarry Crusher ... Sand Screws and Log ... View reliable Mineral Machinery manufacturers on Made … Brucite Ore Crusher and Brucite Processing - Stone … Brucite Ore Crusher is used as crushing brucite ore in ore processing. This article is about how to crush brucite ore. The Brucite Brucite is a magnesium-based mineral. small Brucite grinding machine | Porady dotyczące … Production Line Configuration of Brucite

Equity of Richest Person in Malaysia

704 words - 3 pages Bhd 13.1% Petra Perdana Bhd GuocoLeisure Ltd 8.01% Bank of East Asia Source : Annual Reports 2009 : Bursa Announcements : MSWG Tracker : Malaysian Business, 2009 : StarBiz : The Edge Daily. The next update will be in June 2010. Tan Sri Syed Mokhtar Albukhary 51.76% 27.24% 42.97% 71.48% 55.92% 34.58% MMC Corp Bhd Padini Holdings Bhd Tradewinds (M) Bhd Tradwinds Corp Bhd DRB-Hicom Bhd Amtek

Making Use of the Carey Foster Bridge

851 words - 4 pages 70.73 60.47 65.6 70.77 20.9 31.2 41.6 .0096 .0096 .0096 Table 2 : Determination of an unknown low resistance using a Carey Foster bridge. -- S X/Ω no. Position of balance point with unknown resistance strip in the right gap, l1 / cm : Direct Reverse Mean 27.13 37.24 27.12 37.28 left gap, l2 / cm : Direct 72.91 62.68 Reverse Mean 72.87 62.76 72.89 62.72 l2 – Y = X + ρ ( l2 – l1 ) l1 /Ω / cm 1 2 1 1.2 27.11 37.31 45.8 25.4 1.44 1.44 Result : 1. The resistance per unit length of the bridge wire ρ = ______________ Ω m-1. 2. The value of the unknown low resistance Y= ______________ Ω 3. Error in ρ is ________ % & Y is ________ %.

Wage Rate Determination Under Cross Sectional Data

2284 words - 10 pages overview of wage determination. Determination of wage rates is reviewed bringing into attention some of the factors that contribute to determination of wages. Review of the importance of wage determination is also done. Empirical tools commonly used in assessing wage determination are finally reviewed. The third chapter will provide an outline of the methodology used in the study. A conceptual framework will be developed in order to identify possible


1168 words - 5 pages complex absorbs light in the visible region rather strongly with a maximum absorbance occurring around 510 nm. The absorption of light by this complex follows the Beer-Lambert law over a wide concentration range. In this experiment the iron content of an unknown will be determined by comparing the absorbance at a specific wavelength of an unknown solution to that of standards. Beer-Lambert law ( A = abc Where: A ( is the absorbance (in

Selection of Refractories for Metallurgical Furnace

1084 words - 5 pages life, now useful in Japan MgO-C material. It is impossible to raise the life of the bottom electrode significantly by improving the performance of the refractory. Therefore, the metallurgical spare parts abroad in recent years to carry out the hot work, the use of hot feed requirements are conductive refractories (the conductive steel needle and steel buried), mainly mahogany conductive ramming material, magnesium carbon conductive ramming

Unit 7 Chapter 8 Study Guide

3947 words - 16 pages Unit 7 Unit 8 Study Guide 1. Which of the following statements is incorrect? A) Ionic bonding results from the transfer of electrons from one atom to another. B) Dipole moments result from the unequal distribution of electrons in a molecule. C) The electrons in a polar bond are found nearer to the more electronegative element. D) A molecule with very polar bonds can be nonpolar. E) Linear molecules cannot

Determination Of The Content Of Reducing Sugar Using Benedict’S Test

673 words - 3 pages Lab 4: Determination of the content of reducing sugar using Benedict’s test [Tested sample : Lucozade (glucose content : 22.48 %] Area B1 (max. 15 marks) Aim: ( max. 1½ ) - By use of Benedict’s test to estimate the concentration of reducing sugars - in the given sample, Lucozade - in term of glucose equivalent - by comparing its reducing power with the standard glucose solution (2%) Principle: (max. 6) (Experimental design and

Protein Assay by Biuret and Folin Methods

2236 words - 9 pages for X and Y: The equation for the tubes 13, 14 and 15 which are triplicated and their standard error value: Tubes: | 13,14,15 | 16,17,18 | Standard Error:(mgmlˉ¹) | 0.71 | 1.40 | DETERMINATION OF THE CONCENTRATION OF THE UNKNOWN PROTEINS X AND Y PROTEIN X: 2.1mg per test volume 0.4mL was taken of X 2.1 multiplied by 2.5 (2.5 lots of 0.4mL in 1.0mL) The final concentration of PROTEIN X is 2.1*2.5=5.25mg/mL PROTEIN Y: 1.53mg

Related Papers

Gravimetric Determination Of Moisture In Fertilizer Samples

1312 words - 6 pages Gravimetric Determination of Moisture in Fertilizer Samples Theo Victor A. Cavite ------------------------------------------------- Department of Chemical Engineering, College of Engineering, University of the Philippines Diliman Quezon City 1101 Philippines Results and Discussion Gravimetric analysis utilizes the final mass of the product to infer for the mass of the analyte- for this experiment, the moisture content of the fertilizer

Determination Of Oxygen Dissolved In Water By Winkler

1063 words - 5 pages Determination of Oxygen dissolved in water by Winkler’s Method History The test was first developed by Lajos Winkler while working on his doctoral dissertation in 1888. The amount of dissolved oxygen is a measure of the biological activity of the water masses. Phytoplankton and macroalgae present in the water mass produce oxygen by way of photosynthesis. Bacteria and eukaytotic organisms (zooplankton, algae, fish) consume this oxygen

The Fear Of The Unknown In The Sufi Tale And Lord Of The Flies

729 words - 3 pages The fear of the unknown Alina Liu The fear of the unknown is rife in Lord of the Flies by William Golding and “The Sufi Tale”. In Lord of the Flies, the “beast” or the “Lord of the Flies” represents the fear of the unknown, while in “Sufi tale” the watermelon is the symbol of fear. The boys in Lord of the Flies react almost the same as the villagers in “Sufi Tale”, they both cower and are afraid of this unknown. The settings of both stories

Acid Base Titration: Determination Of The Percentages (%) Of Sodium Carbonate (Na2 Co3) And Sodium Hydroxide (Naoh) In A Mixture

1061 words - 5 pages Title Acid-base titration: Determination of the percentages (%) of sodium carbonate (Na2CO3) and sodium hydroxide (NaOH) in a mixture Objective To determine the respective weight per cent of sodium carbonate and sodium hydroxide in a mixture by acid-base titration. Result and calculation Part A Titration 1 Titration number 1 2 3 Initial volume of burette( cm3) 5.10 2.70 9.70 Final volume of burette (cm3) 34.40