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

Chemistry planning exercise

Extracts from this document...


Finding out how much Acid there is in a Solution. The aim of my investigation is to find the concentration of sulphuric (VI) acid from a sample. The solution is thought to have a concentration between 0.05 and 0.15 moldm-3. To do this I will perform a titration involving sulphuric (VI) acid and sodium carbonate. A titration involves reacting a standard solution with another who's concentration is unknown. I am given anhydrous sodium carbonate so will have to prepare a standard solution of this before attempting the titration. The indicator I will be using to indicate when the reaction is fully completed is methyl orange.(6) This is because I am using a strong acid and a weak alkali and methyl orange is the most appropriate indicator for this type of acid-base titration.The standard solution must be of a certain concentration for the titration to be a success. This is dependant upon the concentration of sulphuric (VI) acid. As this value ranges from 0.05 and 0.15 moldm-3 I can assume an average value of 0.10 moldm-3 as its concentration. The reaction taking place will be H2S04 + Na2C03 H2CO3 + Na2S04 As this equation is in a 1:1 molar ratio, the same concentrations of both sulphuric (VI) acid and sodium carbonate should be used. Preparing a Standard Solution A standard solution of sodium carbonate needs to be prepared. ...read more.


Rinse the beaker well, making sure all liquid goes into the volumetric flask. (The solid may be transferred directly into the volumetric flask, through the filter funnel but only if the solid will dissolve easily and if the funnel has a wide enough stem to prevent blockage). 6. Add distilled water until the level is within 1 cm of the mark on the neck of the flask. Insert the stopper and shake to mix the contents. 7. Using the dropping pipette, add enough water to bring the bottom of the meniscus to the mark on the volumetric flask. Insert the stopper and shake thoroughly 10 times to ensure complete mixing. 8. Label the flask with the contents, your name and the date. After finishing the standard solution an acid-base titration must be done to determine the concentration of a sample of sulphuric (VI) acid by titrating against a standard solution of sodium carbonate (0.1 mol.) Using the standard solution of sodium carbonate (Na2CO3) as a primary standard and titrating it against sulphuric (VI) acid the following reaction takes place: - H2S04 + Na2C03 H2CO3 + Na2S04 To show when this reaction is complete (the equivalent point) you use an indicator called methyl orange. This changes from yellow to orange and finally to red in a solution becoming more acidic. ...read more.


(1) Safety When completing the experiment certain safety procedures have to be taken into account: - 1. Safety spectacles must be worn at all times to ensure no chemicals, or broken glassware enters the eye. 2. A lab coat must be worn as to stop chemicals getting on clothing. 3. You must not run in the lab as to not knock over any chemicals or equipment. 4. 0.1 molar sulphuric (VI) acid is an irritant so if any gets on the skin it must be washed off immediately. (2) 5. Methyl orange is slightly hazardous in the case of skin or eye contact (irritant). Care should be taken, if any gets on the skin it should be washed off immediately. (3) If the plan is carried out to the highest level of accuracy as stated in the plan and measurements are also accurate; this should provide precise results. If concordant results are used this ensures the reliability of the results. The materials used must be used accurately, such as the weighing scales, to 0.001g and the glassware, so that the bottom of the meniscus is on the appropriate reading. The titration must be carried out as the plan states, the burette must be filled inside the scale and the conical flask accurately. The equipment must be cleaned properly before use with the appropriate chemical or distilled water to ensure precise and accurate results. The standard solution must be 0.1 molar to ensure an accurate titration. ...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. Marked by a teacher

    Finding out how much acid there is in a solution

    The colour you see will be a mixture of the two (orange). There is a 50/50 colour, due to equal concentrations of acid and alkaline. Sodium Carbonate: In this investigation, there will be a chemical reaction between sodium carbonate and sulphuric acid.

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

    The stopcock of burette was opened to allow the titrant to fill up the tip and wash the bubbles out. 6. The conical flasks was rinsed with distilled water. 7. A pipette filler and a 25.0 cm3 pipette was taken.

  1. Acid-Base Titrations.

    A complete titration of 50.00 mL of 0.100 molar H2SO4 would therefore require 50.00 mL of 0.200 molar NaOH rather than the 25.00 mL needed for the monoprotic acid HCl in the preceding example. Detecting the Equivalence Point In acid-base titrations, there is a sharp change in pH at the equivalence point.

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

    The antacid was coloured and the solution was cloudy and it was difficult to observe the colour change and hence the end point may be overshoot. 10. During the heating process, some of the liquid may evaporate. Improvements 1.

  1. Investigating the Rate of the Reaction between Bromide and Bromate Ions in Acid Solution

    the same as the method used to vary the temperature written above, except that I will add 10 drops of one of the catalyst solutions (a catalyst which gives a reaction time of between three and four minutes) to boiling tube X in every experiment.

  2. Investigating how concentration affects rate of reaction

    Gives off irritating or toxic gases in a fire. No contact with flammable substances. No contact with combustibles. No water. In case of fire in the surroundings: powder, foam, carbon dioxide. Explosion Risk of fire and explosion on contact with bases, combustible substances, oxidants. n/a In case of fire: keep drums etc.

  1. Titration. The aim of this investigation was to find out the accurate concentration of ...

    Using a small funnel, 5-10cm3 of the prepared solution was added to the burette. The funnel was then removed. The burette was then taken from the stand and tipped and rotated to wash the inside surface with the solution. The solution was then placed into the waste beaker.

  2. We are aiming to accurately prepare a standard solution of 0.1 M (mol dm-3) ...

    To find the mass of sodium carbonate (Na2CO3) we need to find its molecular mass. To calculate the molecular mass of Sodium Carbonate = Na2CO3 Atom Number Relative atomic mass Molecular mass Na 2 23 46 C 1 12 +12 O 3 16 +48 Molecular mass of Na2CO3 106 = g Making a 0.1 M (mol dm-3)

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