• 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...

Introduction

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.

Middle

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.

Conclusion

(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

    It is not affected by heat and so if a substance like sodium carbonate was heated, it would evaporate any water present. Carbonates decompose on heating to give carbon dioxide and a metal oxide. In this case, Sodium Sulphate is produced with carbon dioxide and water.

  2. Acid-Base Titrations.

    change color to indicate that the endpoint of a titration has been reached. The color of an indicator chages because it is affected by the concentrations of ions in the solution. An acid-base indicator is an acid-base conjugate pair, a weak acid-weak base system in which the two forms have different colors.

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

    As a result, there may be loss of active ingredient on antacid and it will reduce the effectiveness of the medicine. 10. Why is solid weak acid added to the antacids? It is used to prevent the acid rebound effect in the stomach.

  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. Investigating how concentration affects rate of reaction

    Heating plate Used to heat the mixture to different temperatures during the reaction. n/a Beakers Used as a water bath to heat the mixtures evenly. 500ml Boiling tubes Used to hold reacting mixture whilst it is heated or cooled to the desired temperature.

  2. Neutralization investigation

    I should therefore make sure I'm wearing a lab coat and goggles at all times while I am conducting the investigation so if any acid or alkali touches me I am protected. I should also make sure I'm standing when acids and alkalis are on the tables because if they

  1. Describe the construction, operation and application of distillation equipment used in industry

    Its production is dependant on the vapour rate of the column. Foam will decrease the efficiency of a column and increase the costs and problems associated with them. c fouling Packed columns: suffer if it contains closed packing such as Raschig rings and Pall rings.

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

    Arrange the apparatus as shown on page 6. Run the acid solution from the burette drop by drop. Use your left hand to open the tap and your right hand to swirl the conical flask (unless you are left-handed). Stop when the indicator just changes colour.

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