Lab Report on Volumetric Determination of Iron with Potassium Permanganate

Lab Report on Volumetric Determination of Iron with Potassium Permanganate

Length: 455 words (1.3 double-spaced pages)

Rating: Excellent

Open Document

Essay Preview

More ↓
Lab Report on Volumetric Determination of Iron with Potassium Permanganate

Principle:

This experiment consists of titrating the ferrous ion with permanganate ion to study the oxidation-reduction reaction. The ions react in acidic solution to give ferric ion and a reduced ionic form of manganese. All the reactants and products except permanganate ion are weakly colored, whereas permanganate is a very intensely colored ion. Then a solution of permanganate is removed as long as there is a ferrous ion present to react with it. But as soon as the entire ferrous ion has been oxidized, the next small portion of added permanganate colors the solution. The first appearance of a permanent pink color indicates the endpoint of the experiment. From the titration it will be able to calculate the percentage of iron in the sample from the data.

Experimental Procedure:
Add 15mL of 6N sulfuric acid to a 125mL Erlenmeyer flask containing 105mL of deionized water (preparing approximately 0.75N sulfuric acid). Obtain a sample of the unknown. Weight the vial and contents accurately on an analytical balance. Handle the vial with a small strip of paper to reduce the risk of error (due to added weight). Pour about half of the sample into a clean dry 200mL Erlenmeyer flask and weight again. Use the remaining half of the sample to get a second weight of around 0.6g-0.7g. Make sure the vial is capped on every weight taken.
Rinse a 25mL buret with three 5mL portions of standard permanganate solution. Fill the buret with the standard permanganate solution and record initial and final readings.
To the first Erlenmeyer flask with the ferrous salt add about 1/3 of the 0.75N sulfuric acid. Dissolve the salt by gently swirling it in the dilute acid. Add about 5mL of the Zimmerman-Reinhardt Reagent (this reagent contains phosphoric acid which complexes yellow ferrous ions into colorless compounds which do not obscure the endpoint; it also contains manganous ions which inhibit the oxidation of any chloride ions in the sample). The use of a white background underneath the flask aids in the detecting of the endpoint. Repeat with second sample.

Raw Data:
1st weighing, vial and sample 6.

How to Cite this Page

MLA Citation:
"Lab Report on Volumetric Determination of Iron with Potassium Permanganate." 123HelpMe.com. 23 Jan 2020
    <https://www.123helpme.com/view.asp?id=129700>.

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Essay on A Lab Report On Coordination

- Introduction Coordination complexes are metals that can accept electron pairs to form coordinate bonds without affecting the charge of the metal. The species that donates its paired electrons is called a ligand. Counterions are not part of the compound but balance the charge of the coordination sphere, the metal and ligands. These compounds are known for their very bold colors and their ability to enhance solubility. In this lab a coordination compound will be formed from Equation 1. (Equation 1) From this, the exact formula for the coordination compound can be found using several methods....   [tags: Ligand, Titration, Concentration]

Research Papers
1107 words (3.2 pages)

Essay on Potassium, Zinc, And Iron Goals

- On average this week I have met my fat, magnesium, sodium, zinc, and iron goals. However, I have also had surpluses and deficiencies. I have had calcium, phosphorus, potassium, vitamin A, and total calories dediciencines. To fix these I will drink more almond and soy milk to increase my calcium, phosphorus, potassium and total calories. I will also eat carrots or take supplements to increase my Vitamin A intake. To decrease my surpluses in protein, carbs, copper, and vitamin C I will eat less foods with legumes, eat less french fries and tater tots, and eat fewer oranges....   [tags: Nutrition, Eating, Food, Health]

Research Papers
716 words (2 pages)

The Standardization Of Potassium Permanganate And The Titration Of Iron Salt

- In last week’s experiment, the standardization of potassium permanganate and the titration of iron salt were utilized in order to figure out the percent of iron within a redox reaction. The examination revealed that the molarity of KMnO4 is indeed .02M and the percent of iron salt in the unknown salt (Tarzan) is around 20.92%. The results were both precise and accurate in both parts of the experiment. This is because the standard deviation and percent RSD in both experiments are very low. This suggests that the numbers obtained are very close to each other which implicates the numbers are precise....   [tags: Redox, Oxidizing agent, Manganese]

Research Papers
1718 words (4.9 pages)

Essay about The Effect of the Iron Industry on Alabama’s Economy

- The boom of mining iron ore, coal, and limestone and producing iron in north Alabama during the 1800s had a tremendous impact on Alabama’s economy of the time. It provided opportunity for the expansion of the railroad and work. Cities were born around this industrial boom. All of these things encouraged economic growth in Alabama during this time. Alabama: A Documentary History to 1900 states “it is a truism that the Civil War altered the economic life of the south” (Griffith, Alabama: A Documentary History to 1900)....   [tags: mining, iron, ore, coal, limestone, north Alabama]

Research Papers
1061 words (3 pages)

Volumetric Analysis practical Essay examples

- Volumetric Analysis Practical To determine the pH of commercially supplied 32% Hydrochloric acid solution. Investigative question Can the pH of an acid which is Hydrochloric acid be calculated by using titration with a standardized base solution of Sodium Hydroxide. Hypothesis That the pH of the hydrochloric acid solution can be calculated using titration with a standardised sodium hydroxide base solution as long as concentration and temperature of base solution remain constant. Variables Independent variable Volume of base (sodium hydroxide) needed to titrate the acid solution Dependant Variable Volume of acid (hydrochloric acid) placed in beaker to be titrated....   [tags: Hydrochlorica Acid Solution, pH Levels]

Research Papers
1596 words (4.6 pages)

Essay on Travel Free Curling Iron

- Travel-Free Curling Iron Girls dream to look stylish each and every day of a year. They want perfect hair everywhere like the movies. It is almost impossible because when you in travel, go camping, go adventure, go outside for project work cannot style your hair. If you carry a light, portable, manageable, usable travel-free curling iron it can possible. The travel-free curling iron specifically designs for travelers. So it has to have some specific criteria to be effective and better curling iron....   [tags: Heat, Temperature, Iron, Hairstyle]

Research Papers
856 words (2.4 pages)

The Movie ' Iron Man ' Essay

- Hero worship exists in almost every culture in various ways. Corresponding to the hero worship, heroism represents the pursuit of particular cultural value, and to a certain extent, it affects the development of the society. Largely reflected in the film and television, heroism is one of the most important themes in Western and Asian media markets. Admittedly, different culture has a different definition of heroism and different taste on the traits of heroes and each culture has its different ways of depicting the heroes....   [tags: Hero, Superhero, Iron Man, China]

Research Papers
2354 words (6.7 pages)

Coal and Iron and the Unification of Germany in 1871 Essay

- Coal and Iron and the Unification of Germany in 1871 In 1862, Bismarck said that ‘the great questions of the day will be settled by blood and iron.’ Although there is undoubtedly some degree of accuracy in this statement, the most important reason for the unification of Germany, which ended ‘the great questions of the day,’ was ‘coal and iron.’ This is a quote from British economist John Maynard Keynes, who argued that the industrial and economic preparation before the wars, which united Germany, were more important....   [tags: Blood and Iron ]

Research Papers
1511 words (4.3 pages)

Patient Report Essay

- FINDINGS: Severe right-sided chest pain. The __ reported a friction rub. A PM lateral showed questionable mediastinal adenopathy. The patient had no cough or sputum production of ___. CT scan in ___ showed a possibility of a 1x2 cm right paratrachial lymphnode. Several smaller anteromediastinal lymphnodes which were all less than 1 cm were also evaluated. The patient was treated with Indocen with relief of her chest pain. ___ level was 64.5 with a ___ 50. PPD was negative, controls were positive....   [tags: Medical Report]

Free Essays
616 words (1.8 pages)

Essay on Potassium

- Potassium Potassium is a vital element in the human body. Potassium had never been distinguished between sodium until the eighteenth century. Before potassium was recognized as an element, potassium carbonate was mixed with animal fat to make soap. It was discovered by Sir Humphrey Davy in England, in 1807. Sir Davy was able to isolate potassium using electrolysis. Potassium was the first metal isolated by this procedure. Today, it is still not found free in nature. It is obtained by electrolysis of chloride or hydroxide....   [tags: essays research papers fc]

Free Essays
633 words (1.8 pages)

042g
2nd weighing, vial and minus half of sample 5.283g
3rd weighing, vial 4.524g
Weight of samples 0.759g, 0.760g
Initial buret reading of first trial 0.00mL
Final buret reading of first trial 14.1mL
Initial buret reading of second trial 0.00mL
Final buret reading of second trial 14.4mL

Calculations:
First trial
0.0141L KMnO4 | 0.1001N KMnO4 | 55.85g KMnO4 * 100% = 10.4% Fe
0.759g KMnO4 | 1 mol KMnO4


Second trial

0.0144L KmnO4 | 0.1001N KmnO4 | 55.85 g KmnO4 * 100% = 10.6% Fe
0.760g KmnO4 | 1 mol KMnO4



Discussion:

From the equations below it is possible to obtain the oxidation state of reduced ionic form

of manganese.

5Fe+2 à 5Fe+3 + 5e- oxidation reaction

MnO4-1 + 5e- + 8H+1 à Mn+2 + 4H2O reduction reaction

5Fe+2 + MnO4-1 + 8H+1 à 5Fe+3 + Mn+2 + 4H2O


The reduced ionic form of manganese is Mn+2. The equation showsMnO4-1

decomposes into Mn+2, in the reduction equation, which in turn is the reduced ionic form

of manganese.
Return to 123HelpMe.com