• 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

    Sodium carbonate is a carbonate. It contains two atoms of sodium, one atom of carbon and three atoms of oxygen. Sodium is a group one metal, and is more stable to heat, than corresponding group 2 elements. Sodium is seen to be very soluble and has high thermal stability.

  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.

    The titration uses the stoichiometric reaction HCl + NaOH --> NaCl + H2O, which could just as accurately be written as H3O+ + OH- --> 2H2O. Since the reaction is a 1:1 reaction, 5.00 mmol of HCl are equivalent to 5.00 mmol NaOH.

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

    aluminium hydrocide Sodium bicarbonate Calcium carbonate Advantages provides long- lasting relief Long-acting quick, long-lasting relief less risk of constipation well absorbed most readily available and neutralizes acids quickly fast and neutralizes acids for a relatively long time help boost calcium intake Disadvantages Insoluble and less readily absorbed dissolves slowly in

  1. Investigating how concentration affects rate of reaction

    n/a Ice cubes Used to cool the water bath to temperatures below room temperature. n/a Thermometer Used to measure the temperature of the mixture so that it can be kept constant throughout the reaction. n/a Method 1. Set the apparatus up as was done in the experiment investigating concentration change.

  2. Neutralization investigation

    The substances involved cause the reaction chemically and the physical effects of the indictor do not in any way affect the results. So the only the difference between the indictors is how accurately they show the reaction. I will use orange methyl indicator as an indicator for this investigation because

  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) ...

    Aim To calculate the unknown concentration of hydrochloric acid by carrying out a titration Equation The equation for this reaction is: Acid + base ï° salt + water + carbon dioxide Hydrochloric + sodium ï° sodium + water + carbon acid + carbonate chloride dioxide 2HCl + Na2CO3 ï° 2NaCl + H2O + CO2 2 moles of hydrochloric acid (N1)

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