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

Experiment: Titration Aim My aim is to find the volume of hydrochloric acid needed to neutralise sodium hydroxide.

Extracts from this document...


Experiment: Titration Aim My aim is to find the volume of hydrochloric acid needed to neutralise sodium hydroxide. Theory Titration is a laboratory method used to analyse a chemicals concentration. In this experiment 10cm3 of sodium hydroxide should be neutralised by 10cm3 of hydrochloric acid. Phenolphthalein is used in this experiment as an indictor where the base is a pink colour and acid as a cloudy white colour. When they are use to neutralise each other the mixture goes clear at the endpoint. The endpoint is where the number of moles in both solutions is equal. Different types of titration: * Acid based titration - neutralisation between an acid and a base * Redox titration - form of oxidation reduction * Complexometric titration - used to find certain ions Equipment The equipment I am going to use in this experiment; * Funnel * Hydrochloric acid * Sodium hydroxide * Bosshead / clamp * Stand * Conical flask * Burette * White tile * Goggles * Measuring cylinder * Phenolphthalein Funnel Diagram Bosshead / clamp Burette stand Sodium hydroxide Phenolphthalein White tile measuring cylinder hydrochloric acid Conical flask Method 1. ...read more.


The chemicals can be very dangerous if it is at a high concentration. Sodium hydroxide: It is a very harmful corrosive; it can cause burns as well as permanent damage to eye if contact with it. The E.U classification for sodium hydroxide is corrosive. To prevent potential risk I am going to wear goggles in this experiment. Hydrochloric acid: Hydrochloric acid is very corrosive and can damage eyes if it comes into contact. It's also lethal to fish from 25 mg/l up also toxic for aquatic organisms due to pH shift. To prevent potential risk I am going to wear goggles in this experiment. Phenolphthalein: Phenolphthalein is safe to use and it doesn't appear to have any safety risks. Result table Number of times the Cm3 of hydrochloric Experiment was repeated acid needed 1 10 2 9.7 3 10.2 4 9.8 5 10.4 Average 10.02 Calculations Hcl = hydrochloric acid Naoh = sodium hydroxide Mr - NaoH Na + O + H 40g Mr - Hcl cl + H 36.5g No. of moles of Naoh Volume x molarity 0.02L x 0.5M = 0.01 moles (20ml) ...read more.


What would i do to the limewater in the experiment. This is only the planning part of the coursework so i only need to show my method, apparatus, safety precautions etc. you dilute the acid.. any low concentration will do.. i would go for 0.1M/0.25M... better not have it tooo concentrated for safety reasons. fill the burette with the Acid and using a pippete, put 25cm3 of the limewater into a conical flask with a few drops of indicator (phenophthalin(howeva u spell it)) and titrate till eqivalence point (till the drop that turns the solution pink permanently) read the volume of acid used from the burette. the concentration of acid is known so find the number of moles now using write out the equation and use stochiometry to find mumber of moles of Ca(OH)2 present. your volume was 25cm3 (with the pippete) so calculate concentration by c=n/v yea basically its the same thing coz the number of moles of acid needed will never change... so if its more concentrated, less acid will be needed, but n=CV .... you will always get the same number of moles in the end, no matter what concentration you use.. but dont have it too concentrated or else youll have a highly exothermic vigourous reaction... keep away from that! ...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

    However, it is harmful if it was inhaled. Risk Reduction Suitable clothing should be worn so the substance does not come in contact with your own clothing. It vapour/gas/fumes shouldn't be inhaled. Goggles should also be worn so it doesn't come into contact with the eye. It can cause irritation.

  2. Determination of the Amounts of Sodium Hydroxide Solution and Sodium Carbonate in a Mixed ...

    I have used an unreasonably long time to wash the apparatus and my motion was too slow. If I could allocate my time appropriately, I would not have made so many errors. Another way to improve is to use a pH meter instead of using an indicator to determine the equivalence point.

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

    of moles of NaOH required to neutralize excess HCl: No. of moles of NaOH = Molarity � volume = 0.1 � (20.9 / 1000 ) = 0.00209 mol HCl(aq +NaOH(aq --> NaCl(aq) + H2O (l) No. of moles of HCl neutralized by NaOH : 0.00209 mol No.

  1. Investigating how concentration affects rate of reaction

    Long 0.3 Reaction Took Too Long As can be seen from the table above, at concentrations of 0.3 and 0.4M, the solution took much too long to turn colourless. This was impractical, as it meant that I was less likely to be able to conduct a suitable number of repeats to get an accurate average time.

  2. Methods of analysis and detection

    Phenolphthalein Acidic = Colourless // Alkaline = Red 2. Methyl Orange Acidic = Red // Alkaline = Yellow 3. Azo Dyes - coloured due to presence of chromophores Benzene Diazonium + Napthalene-2-ol --> Red azo dyes + HCl I. Combined spectral Techniques - Analysis of mixture and compound Now, we will be able to use evidence from N.M.R.

  1. Electrochemistry - Inventing Better Batteries

    the number of moles of electrons involved in the reaction), and F is the Faraday constant (96,500 C mole-1). <Science Waterloo, 2008> The notation ared represents the half cell which appears on the reduced side of the cell and the notation aox represents the half cell which appear on the oxidized side of the cell.

  2. Chemistry planning exercise

    Reweigh the bottle with any remaining sodium carbonate to the nearest 0.001g. The mass difference is the mass of the solid used. 4. Stir to dissolve the solid. 5. Transfer the solution to the volumetric flask through the filter funnel.

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