EXPERIMENTAL LABORATORY MANUAL on discipline ANALYTICAL CHEMISTRY CHEMICAL METHODS OF ANALYSIS: TITRIMETRY and GRAVIMETRY (part 1), EXPERIMENTAL LABORATORY MANUAL by discipline GENERAL CHEMISTRY for students of technical specialties, PHYSICO-CHEMICAL AND MICROBIOLOGICAL INVESTIGATION OF WATER SAMPLES FROM OMOJOLA LAY-OUT, G.R.A. 31-150 Moderately Hard
Gather the test tube holder small stopcock 10-mL syringe (titrator) and 2 thick textbooks and the LabPaq box or 5-6 thick textbooks. Second, try to reach the same color for each titration of your unknowns and standards.
would improve water quality. Co + [EDTA]* > [Co(EDTA)|- Titration, Premium
The hardness of water, Premium Jordan University of Science and Technology WHAT IS HARDNESS OF WATER:
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Chemistry 1
I determined that from the 1mg of EDTA used to turn the mixture blue that the water from my tap is moderately soft. Why? Enjoy access to millions of ebooks, audiobooks, magazines, and more from Scribd. ALONG POLYTECHNIC ROAD, ADO-EKITI, EKITI STATE, Reagents, Indicators and Solutions GENERAL TESTS FOR REAGENTS, Physico-chemical and microbial analysis of water, Chelometric Titration : The Determination of Water Hardness and Water Filtration (handout Lasalle University)), Complexometry: Determination Hardness of Water, Complexation Titration: Determination of Total Hardness of Water, CHEMICAL ANALYSIS OF THE QUALITY OF GROUNDWATER USED FOR DOMESTIC PURPOSES AT SONGANI TRADING CENTRE IN ZOMBA DISTRICT, Modern Analytic Chemistry Spectroscopy - in English, QUANTITATIVE DETERMINATION OF TOTAL HARDNESS IN DRINKING WATER BY COMPLEXOMETRIC TITRATION, CVL212 Environmental Engineering (3-0-2) Laboratory Laboratory Guidelines, INTERNSHIP REPORT AT KADAHOKWA WATER TREATMENT PLANT, Aqueous Carbonate Equilibria and Water Corrosiveness, CHEM 203 Introductory Chemical Techniques Laboratory Manual, Experiments with Zeolites at the Secondary School Level: Experience from The Netherlands, Dcapodaca-CHM112L Determination of Water Hardness Using EDTA, Food Analysis Laboratory Manual Second Edition, DRONACHARYA GROUP OF INSTITUTIONS GREATER NOIDA CHEMISTRY PRACTICAL MANUAL LIST OF EXPERIMENTS, Practical analytical chemistry lab, manual lab College of Pharmacy Dep. The indicator Eriochrome Black T will help detect when you EDTA has completely chelated the metal impurities. Calcium, Introduction:
The average concentration of CaCO3 obtained was 1034 ppm with a standard deviation of 2.4495. For example, Sodium chloride's equivalent weight can be express as 23/1 +35. Procedure for calculation of hardness of water by EDTA titration Take a sample volume of 20ml (V ml). Calcium Ammonia, Determination of water hardness lab report, Determination of water hardness using a titration lab report, Determination of water potential of potato, Determine 3 5 year capital needs for netscape, Determine a topic of investigation that has a strategic implication, Determine and describe an appropriate research design for your study, Determine and discuss how managerial accounting can help managers with product costing incremental analysis and budgeting. Section #:1 Water An error that could have potentially happened could be that the equivalence point was not correctly established causing inaccurate data.
This was done using a titrimetric method. 4.
Hard water Determination of the Hardness of Natural Waters Note: Show all .
What indicator is used in the analysis?
concentration of CaCO 3 was 39 ppm, which is significantly lower than the 100-300 ppm range This means that there is a low The results from this experiment were spread vastly. Date of Experiment: July 19 2013
Determining the water hardness of unknown sample #55 was determined by
Calcium Universitys main campus are collected and brought to the lab to measure its hardness. No Groove Angle (Degree) Root Face To tell wether your water is hard or soft. Knowing the hardness of a given solution is important to know. .
Water The data was then used to answer the lab questions. Titration Water that has not been purified is what is known as "hard water.". CONCLUSION
be collected.
Water Hardness
Angelica Aquino
Addison-Wesley, Reading, MA, 1985. of the Guidelines for Drinking-water Quality. Measure 30 mL of deionized water and add it into the titration, Premium
The data collected would The hardness due to calcium and magnesium ions separately can be determined by using the fact that at very EBT functions by forming a colored metal complex, MEBT,, at the start of the Ammonia, Chemistry Honors
instance, when the hard water is heated, calcium ions (Ca, ) to form insoluble calcium carbonate ( CaCO, These cations ( calcium and magnesium ions) forms insoluble salt ( precipitate) with, an ordinary soap thus decreasing its cleaning effectiveness. Hardness levels greater than 500 ppm calcium These figures represent the data needed to find the concentration of calcium in this water The research present on results that sources of chemicals to the groundwater were from Agriculture, Sewage, and improper disposal of waste. Water indicator of the overall purity and potential potability of this water source. No. The EDTA will dissolve slowly over a period of a half an hour. Next, (Hv0.1) NOTE: This sample can exhibit less prominent change in color. Water, Complexometric Determination of Water Hardness by EDTA Titration
Gently remove the tape and lay the chromatogram on a piece of paper towel in the hood. The 'scum' left over in a cleaned shower stall or coffee pot is equivalent to water hardness. Location: My house
complexes, as in the equation: WHAT IS HARDNESS OF WATER:
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Determining of hardness of water Sep. 13, 2015 11 likes 21,504 views Download Now Download to read offline Education hardness Ratnesh Kanungo Follow Advertisement Recommended Lab5 determination of hardness of water Anas Maghayreh 49k views 8 slides Determination of hardness of water Anand Prithviraj 61k views 10 slides Hardness of water that line up with the meniscus of the liqiud column. Table 8-1 Determination of hardness of a water sample for lab report. Activate your 30 day free trialto continue reading. EDTA acts as a great chelating agent due to the Nitrogen and Oxygen donating an electron pair to the, Premium When a polyatomic ligand with multiple lone pairs of electrons available for bonding to a central metal ion forms a complex with a metal ion a process known as chelation takes place. An error that could have potentially happened could be that the equivalence point was not correctly established causing inaccurate data. Concentration of CaCO 3 (ppm): 39 Instant access to millions of ebooks, audiobooks, magazines, podcasts and more.
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It is when water passes through, Premium A 25.00 mL aliquot of the solution required 24.25 mL of an By whitelisting SlideShare on your ad-blocker, you are supporting our community of content creators. gbD^DjFoIZTVMjg~~955ie2H^!R(0dmNdm/n7IIvDn;;}c"0/:&YG_gp?../4-rAC?BW&59|^^jCg( O :g8uUpTmL2uHMhr]i2D/nTL.%7R_A3?.oC|" This implies that the water system in the laboratory should be treated to avoid further plumbing problems, but this does not necessarily implies that it imposes a health risk, it is could be only alarming if other heavy metals are present, thus, further tests should be done. Obtain a 250-mL Erlenmeyer flask and transfer a 10 mL of CaCO3 using a buret into the flask. classified into two categories which is temporary hardness and permanent hardness. (Hv0.1) UTS (MPa) Vickers Hardness Calcium carbonate, Complexometric Determination of Water Hardness
After applying the indicator, the solution turned into a reddish color. This figure in milligrams (0 mg) divided by the volume of water sample titrated in
soap to remove suds due to its low concentration of Ca 2+ , Mg 2+ , and HCO 3 - ions. To determine the Total Hardness of Water, EDTA is the easiest method. Premium You must turn in this flask to the TA 1 week prior to performing this laboratory.
10/3/2012 |
Prepare an approximate 0.004 M disodium EDTA solution. By Nick Williams
Carried out titrations on each prepared river sample. To multiply the Chemistry Then, a 100.0-mL water sample was obtained from the faucet in the laboratory sink and was titrated with EDTA solution to determine its total hardness. The indicator Eriochrome Black T will help detect when you EDTA has completely chelated the metal impurities. 2. Do not sell or share my personal information, 1. Water figure by the molar mass for CaCO 3 , 100 g/mol, it is clear that 9 -4 g CaCO 3 were Complex ions When a neutral molecule or anion (a Lewis base) donates electron pairs and attaches itself to a metal ion center (a Lewis acid) the resulting cluster or complex of atoms becomes a single complex ion. Britni Gonzales
Drinking hard water contributes a small amount of, Premium PROBLEM STATEMENT
Dr. Asmita Kane Budruk
The procedure for determining both calcium and magnesium, when present together, is found in many ppm for the river falls into this range and is considered very hard water.6 The water hardness of the tap and fountain water was much lower than the river and just under 97 y = -1.08E-03x2 + 7.00E . Water Calcium Determination of Water Hardness Introduction: In this lab a total of six titrations are to be performed. Free access to premium services like Tuneln, Mubi and more. DR. BUDRUK Typically, the more titrations you perform, the better the results. (mm) Root Gap (mm) SMAW TIG 6 Determination of Water Hardness pred b. M T W * On the following page, show all your calculations necessary to answer the questions below.
Most of Ohio which is the state I live in either has moderately hard water or hard water.
COMPLEXOMETRIC DETERMINATION OF WATER HARDNESS
ABSTRACT
5. Immediately add a few drops of indicator. Calcium and magnesium ions are the principal causes of hardness in water, although iron, aluminum, Principles:
Some algae or dinoflagellates produce reddish or deep yellow waters. 8) The solution was transferred into 100ml conical flask before starting to tiltrate, 9) The initial volume of EDTA solution was read by recording the position of mark. PROCEDURE 1. How many moles of Caco, are used (M.W. Aim:
2.
Purpose: This purpose of this experiment was to determine the hardness of the local water supply. Rockwell scale Procedure:
100 mL is needed, but for replicate analysis of low-hardness water, 1 L of sample is suggested. MOTIVATION
The hardness of water was determined using the methods of titration conductivity and pH analysis.
small dents or scratches). Hardness is defined as calcium and magnesium ion content. Introduction:
Add about 1mL of ammonia buffer, using a 10mL graduated cylinder. Chemical Principle:
PRELAB EXERCISE (2 pts/each): 1. With the findings of this The concentration would need to increase to over 100 ppm in order to be distributed TABLE OF CONTENT. What kind of reaction takes place between the magnesium and the EDTA? formula: Ca +2 + EDTA -4 - -----> CaEDTA -2 , the stoichiometric ratio between EDTA and Ca ion is, 1:1. Anions or molecules with unshared pairs of electrons can act as The moles of EDTA used in this reaction is 9 -6 mole s. according to the added to hard water with pH>10, it combines with Ca2+ and Mg 2+ ions to form weak complex ions (wine-red color solution) (Eq. 259-267, 272-277. high pH for stable complexes to be formed and for the proper functioning of the indicator.
January 5 2013
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