• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

OBJECTIVE: To determine the content of iron in iron tablets by titration.

Extracts from this document...


LAB: #3 DATE: 25th September, 2007 TITLE: Analyzing Iron Tablets OBJECTIVE: To determine the content of iron in iron tablets by titration. MATERIALS: 1. goggles and lab coat 2. 2 125cm3 conical flask 3. 1 250cm3 standard volumetric flask 4. 1 50cm3 burette 5. safety filler and pipette 6. 1 stand and clamp 7. filter funnel 8. Bunsen burner kit Chemicals 1. Iron tablets 2. 1.0moldm-3 sulphuric acid (200cm3) 3. 0.01moldm-3 Potassium Per Manganate 4. Distilled water/ wash bottles 5. soap solution PROCEDURES: Making a solution of the tablets 1. 5 iron tablets were weighed accurately, and then dissolved in about 100cm3 of 1.0 moldm-3 sulphuric acid in a conical flask. ...read more.


2. About 25cm3 of 1.0 moldm-3 sulphuric acid was added and titrated with 0.01 moldm-3 Potassium Manganate (VII) solution. 3. The experiment was repeated until two coincident results were obtained. OBSERVATIONS, RESULTS, DATA: Description Initial Reading Final Reading Volume of HCl Rough 0 12.5 12.5 First Titration 12.5 23.2 11.3 Second Titration 23.2 35.2 12.0 Average 7.5 15.3 7.7 TABLE SHOWING RESULTS OF IRON TABLET SOLUTION AND POTASSIUM MANGANATE (VII) TITRATION CALCULATIONS: To calculate the amount of iron dissolved in volumetric flask Iron + sulphuric acid --> iron sulphate + hydrogen gas Fe(s) + H2SO4(aq) --> FeSO4(aq) + H2(g) Concerned with 1 mole of iron sulphate produced from 1 mole sulphuric acid # of moles of H2SO4 = volume/1000 X concentration = 100/1000 ...read more.


The conclusions drawn are not as accurate as expected due to the high difference in percentage of acetylsalicylic acid content found compared to that given. Analyzing Iron Tablets Assessment: (M/M) Mark Scheme Weighing - Zero before weighing [1] Heating - Use of proper attire (apron/goggles) - Heat slowly - readjusting flame to proper height/color (any 2 - 1 mark; all 3 - 2 marks) Measuring Volume - Measuring Cylinder: On a flat Surface read bottom of meniscus [1] - Volumetric flask: fill to the mark [1] Pipette: Rinse with required solution [1] Touch top of pipette to surface liquid [1] Proper use of pipette filler [1] - Burette: rinse with required solution Use funnel to fill burette Nozzle free of air bubbles. (any 3- 1 mark; any 4- all 2 marks) Total = ___________ ?? ?? ?? ?? Anuar Flores CHE 124-1 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Physical Chemistry section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Physical Chemistry essays

  1. Drug: Antacid Effectiveness Analysis To determine the neutralizing ability of antacids in different ...

    The other ingredients may affect the solubility of the bases inside the anti-acid 6. The reaction may not be complete. 7. Error in taking burette reading (0.05 cm3). 8. The end point may not equal to the equivalence point.

  2. Analysis of commercial vitamin C tablets

    For example, smokers need twice as much as non-smokers. ~Remarks of the experiment~ 1.> Vitamin C is a reducing agent which can reduce I2 into colourless I-. However, the back titration is used instead of direct titration with I2 because I2 can be easily vapourize thus the molarity of I2 solution is difficult to control, thus using 'standard' I2 solution for titration is impossible.

  1. Determination of the content of Mg (OH)2 in an indigestion remedy by back titration ...

    0.023125/2 = 0.0115625 mol 9. 0.0246/2 =0.0123 mol 10. 0.02425/2 = 0.012125 mol Mass of Mg (OH)2 used = amount in moles x Mr Mr = 24.305 + (15.999 x 2) + (1.0079 x 2) = 58.3188g 11. 0.0115625 mol x 58.319g (3.d.p.)

  2. Aim:To investigate the content of vitamin C (ascorbic acid) content in a commercial tablets ...

    Na2S2O3 solution = 1.8224 10-3(18.81000)= 0.0969M Finding the amount of Vitamin C by adding excess I2 and back titrate I2 against standard Na2S2O3. No. of moles of I2 in 25cm3 solution = = 9.112 10-4 No.

  1. Indigestion Tablet

    the first brand (breaking the tablets or grinding them in order to increase surface area for the reaction to take place) 8. When the reaction stops , repeat titration and record the volume of sodium hydroxide used 9. Repeat the titration using one tablet of the second brand Results: Tablet:

  2. A Redox Titration " Determining the percentage of iron in an iron ore

    Label the flask as 'Titrant'. g. Wash a burette with distilled water and then with 'Titrant'. h. Pour 'Titrant' into the burette and ensure the tip of burette is filled. i. Record the initial burette reading. j. Pipette 25.0 cm3 of 'Standard' into a conical flask.

  1. Acid-base titration. Objective To determine the concentration of sulphuric acid (H2SO4) using sodium ...

    The pipette filler was pressed and then its tip was put into the top end of the pipette tightly. The pipette and the pipette filler were kept connected together. The tip of the pipette was inserted into a beaker of distilled water.

  2. Aspirin tablets

    Using a safety filler and pipette, exactly 25cm� of the approximately 1M NaOH solution was transferred into a 250 cm� standard flask and made up to the mark. 2. 25 cm� of this solution was titrated against 0.0962M hydrochloric acid using phenolphthalein indicator. Part 2 : Hydrolyse the aspirin 1.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work