Nobody downloaded yet

PH Titration - Lab Report Example

Comments (0) Cite this document
Summary
The paper dwells upon the titration. It includes calculations and experimental results. Titration refers to an experimentally conducted process in chemistry lab, normally for the purpose of determining substance concentration of interest in a solution…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER98.9% of users find it useful
PH Titration
Read TextPreview

Extract of sample
"PH Titration"

Download file to see previous pages The paper describes the experiment. During titration, it is essential to figure out the ‘equivalence point’ where moles of acid and moles of base added become equivalent. To aid an experimenter in this situation, a halochromic organic compound known as ‘indicator’ (s.a. phenolphthalein, methyl red, methyl orange, and bromothymol blue) is incorporated where appearance of color change from clear solution signifies the ‘end point’ or the point assumed to be nearest the point of equivalence. At this stage, the volume of reading from the burette is noted down the instant the indicator changes color. With experimental outcomes comprising known molar concentrations and volumes of acid and base used, pH is calculated. In place of an indicator, glass electrode is utilized so that multiple pHs may be read and graphed from which to determine the pH at the equivalence point. For the neutralization reaction occurring between HCl (aq) and NaOH (aq): For the neutralization reaction occurring between CH3COOH (aq) and NaOH (aq): Hypothesis: The equivalence point is achieved once the titration has gone to the extent when the acid (analyte) and the base (titrant) are in equimolar amounts which takes place on yielding a neutral pH along a steep region in the titration curve Aim: To locate the ‘equivalence point’ through the measure of pH based on the titrant volume vs. pH-titration curve obtained in the experiment and identify the remaining species (in excess) as well as find the pH of the resulting solution after each titration attempt Method: The burette was filled with 1.0 NaOH to the zero mark. A 250- conical flask was rinsed with distilled water, emptying the flask and refilling it with about 50 of deionised water, after which, a 25 of 0.1 HCl was poured into the flask via pipette and the flask was placed on the magnetic stirrer. With the stirrer bar dropped in the flask, the glass electrode was immersed in the flask then the burette was positioned over the flask’s mouth such that the NaOH would be added into it without obstruction from the glass electrode. The magnetic stirrer was turned on and the flask was adjusted in the manner that would enable the stirrer bar to move freely, having no obstructive contact with the glass electrode throughout the titration process. Measuring of the pH prior to titration was initiated then successive additions of the base titrant were carried out starting with 1 until the equivalent point was arrived at, followed by 0.2-additions that sum up to approximately 8 of NaOH. Final addition of two consecutive 1- titrant amounts was made, taking into account the pH reading for each addition from the onset of titration to this point. Another trial (using the same analyte -- HCl) was performed, then titration was repeated, this time using a different analyte (0.1 CH3COOH) and applying the same quantity (50 ) of deionised water and of 1.0 NaOH. As conducted for HCl, pHs of neutralization reaction between HOAc (analyte) and the titrant (NaOH) were correspondingly read after each base addition. Results and calculations: Note: ( 1 cm3 ? 1 mL ; 1 mol / dm3 ? 1 M ) pH @ equivalence point is about 6.8 based on the graph. This corresponds to NaOH volume of about 5.5 mL. mmoles NaOH = (1.0 M) (9.00 mL) = 9.0 mmoles NaOH mmoles HCl = (0.1 M) (25.00 mL) = 2.5 mmoles HCl Upon neutralization, 9.00 mmoles - 2.5 mmoles = 6.5 mmoles NaOH left total volume = 50 + 25 + 9 = 84 mL [OH-] = = 0.07738 M ---? pOH = -log (0.07738) pOH = 1.11 so that pH = 14 - 1.11 ---? pH = 12.89 Since NaOH and HCl are strong base and strong acid, respectively, pH ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“PH Titration Lab Report Example | Topics and Well Written Essays - 1500 words”, n.d.)
Retrieved de https://studentshare.org/chemistry/1496892-ph-titration
(PH Titration Lab Report Example | Topics and Well Written Essays - 1500 Words)
https://studentshare.org/chemistry/1496892-ph-titration.
“PH Titration Lab Report Example | Topics and Well Written Essays - 1500 Words”, n.d. https://studentshare.org/chemistry/1496892-ph-titration.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
CHECK THESE SAMPLES - THEY ALSO FIT YOUR TOPIC
Orange Juice Titration
...?Effect of Oxygen and Light on Orange Juice (Ascorbic Acid) Introduction Titration is a method to determine the precise endpoint of a complex reaction and thereby the precise quantity of the reactant in the titration flask. Titration is a common laboratory method of quantitative chemical analysis that is used to determine the unknown concentration of a known reactant. The process of titration is also known as volumetric analysis of a chemical. A reagent (also known as the titrant) of a known concentration is reacted with a solution of the reactant whose concentration is not known [1]. Orange juice contains ascorbic acid. Ascorbic acid ascorbic acid (also known as Vitamin...
3 Pages(750 words)Essay
Titration Chemistry Essay
...of the indicator are usually known when it is added into an acidic, basic or neutral solution. This means that the indicator is a substance used to determine the PH of a substance, where the PH refers to the acidity of basicity of a substance. 4. The titrant is then added from the burette into the titration flask drop-by-drop, while carefully monitoring any color change in the titration flask. 5. The titration continues until the point where the color of the solution in the titration flask suddenly changes color. As previously stated, the color of the indicator in the solution is always known; therefore, when the solution changes color...
3 Pages(750 words)Essay
PH Titrations
...? PH Titrations Background Titration or titrimetry involves a method of laboratory that is used to analyze chemicals quantitavely and to determine the concentration of the unknown solution. The process is depended on the volume of a solution, a process that is referred to as volumentric analysis. A standard solution is defined as a reagent. In most cases, a concentration that is known reacts with the titrant volume to establish the concentration. Titration involves a group of experiments in which the known solution property is utilized in inferring to the unknown property of a different solution. In the chemistry of acids and bases, titration is used in...
4 Pages(1000 words)Lab Report
Acid base titration
..., hence increasing its acidity nature compared to when it was a basic and a having a pH value more than 7. However, the color continues to remain the same but extent of acidity increases with addition of extra acid solution to the titrant, which in this experiment is a Standard 0.10 mol. /dm3 Sodium Hydroxide. Suppose there is a need to plot titration curves, then potentiometer is more accurate than either weak organic acid indicator or a weak organic base indicator (Patnaik, 2010). Since, it gives exact values compared to the latter two, which only relays the change of solution’s color (Patnaik, 2010.p. 61). An indicator is a weak organic acid or weak organic base having a formula of HY or HOY...
5 Pages(1250 words)Lab Report
PH Indicators
...pH Indicators Report Form Part I: Acidic Indicators Complete the following Tables. - Remember the mean molar concentrations. An easy way to calculate concentration after dilution is M1V1 = M2V2 Indicator: Bromothymol Blue Test Tube Color After Adding the Indicator [H+] pH 1 Light Yellow 0.05 1.303 2 Light Yellow 0.005 2.30103 3 Light Yellow 0.0005 3.30103 4 Light Yellow 0.00005 4.30103 5 Light Yellow 0.000005 5.30103 6 Light Yellow 0.0000005 6.30103 7 Aqua Blue 0.00000005 7.30103 Useful range for the indicator: 6.3-7.3 Indicator: Bromocresol Green Test Tube Color After Adding the Indicator [H+] pH 1 Dark Yellow 0.05 1.303 2 Dark Yellow 0.005 2.30103 3 Dark...
5 Pages(1250 words)Lab Report
Unknown and Undiluted Titration Date
...) is V solution. Propagation of the errors calculates the uncertainty. Balance of uncertainty is +- 0.0001g and that of volumetric flask’s uncertainty is +-0.15 ml. standard relative deviation is initialized by SRD. Calculation of results is in tabulation in the table. Results show that, both relative derivation volume and relative derivation balance is +-0.0003.Moreso, after calculating using the values above EDTA concentration solution is 0.0018+-0.0004M. Unknown sample titration 1.00ml Ca/Mg solution in spike is contained in the blank titration, Ph 10 buffer solution, water in conjunction with the indicator. From all the titration, the data in trial one from all the...
2 Pages(500 words)Essay
MEASURING pH
...was crushed and mixed in water prior to measurement. For the first titration run, the formed Rolaid solution was added gradually to the soda. The addition of Rolaid solution was carried out in increments of 10 mL to a maximum of 30 mL of Rolaid solution in soda. pH of the resulting solution was measured at each addition of the Rolaid solution using a pH meter. For the second titration run, the diluted lemon juice solution was gradually added to the milk. The addition of lemon juice solution was carried out in increments of 10 mL to a maximum of 30 mL of lemon juice solution in milk. pH of the resulting solution was measured at each addition of the lemon...
2 Pages(500 words)Lab Report
PH 91
... Sexually Transmitted Infections Sexually transmitted infections are quite amongst the population that is recognized as the youth of the society and they are especially quite common amongst those who age 12 years old and above. The most common STIs experienced by this age groups includes genital herpes and the main symptom of this infection is burning sensation experienced at the time of urination (CDC 1). The most common treatment for this STI is antiviral drugs but they can only remove existing occurrences of herpes. Genital psoriasis is another quite common STI which is categorized by the plaques that are quite red in color and thin in feeling and they develop mostly on the penis. To treat this STI one of the best methods... Sexually...
2 Pages(500 words)Assignment
Titration
...Titration of sodium hydroxide using hydrochloric and sulphuric acids Acid-base titration to find the molarity of two acids Aim The aim of this lab practical is to carry out the titration of a base, sodium hydroxide with two acids: firstly hydrochloric acid and then sulphuric acid so as to determine the molarities of the two acids. Background theory When a base is titrated with an acid, the pH gradually changes until it reaches the equivalence point, where there is a sharp change. At this point there is an equal amount of both the acid and the base. As the titration proceeds, the point at which the colour of the solution that contains the indicator changes is called the end point (Levine, 2001). In the case of the titration of NaOH... ...
3 Pages(750 words)Lab Report
Complexometric Titration of Calcium
...Practical Application Complexmetric titration This experiment is referred to as a Complexmetric titration which is applied in the determination of traces of calcium in milk or water samples. The experiment can also be used to determine the presence of calcium carbonate in solid samples. The experiment has various application both in the laboratory and industrial applications. Drug manufacturing firms for instance use the procedure to test for the presence of anti-acid in drugs. The titration involves complex reactions where molecules or ions are formed when metals ions react with ligands or complexing agents which represents either one or more molecules. The reaction just like any other...
4 Pages(1000 words)Lab Report
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Lab Report on topic PH Titration for FREE!
logo footer
Contact us:
+16312120006
Contact Us Now
FREE Mobile Apps:
  • StudentShare App Store
  • StudentShare Google play
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • Miscellaneous
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us