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

The aim of this experiment is to determine the concentration of a limewater solution by method of titration.

Extracts from this document...

Introduction

Assessed Practical To determine the concentration of a limewater solution. Aim: The aim of this experiment is to determine the concentration of a limewater solution by method of titration. Ca(OH)2 (aq) + 2HCl (aq) CaCl2 (aq) + 2H2O (l) The calculation below is to determine the dilution factor and the volume of HCl needed for this titration. Moles of Ca(OH)2 = Mass / Mr 1 / 40.1 + (16 x 2) + (1 x 2) 1 / 74 0.013513513 moles Concentration of Ca(OH)2 = N / V 0.01 / 1 0.01 moldm -3 Moles = C x V 0.013513513 x (25/1000) 0.0003378moles Ratio: HCl : Ca(OH)2 2 : 1 0.000676 : 0.0003378 Moles of HCl = moles of Ca(OH)2 x 2 V = N / C 0.00674 / 2 ...read more.

Middle

* 250cm3 conical flask * distilled water * 25cm3 pipette To dilute the Hydrochloric acid- 1. Pour 2.5cm3 of HCl into a volumetric flask using a 5cm3 graduated pipette. 2. .Fill up to the marked like on the 250cm3 volumetric flask with distilled water. 3. This has diluted the 2mol dm -3 HCl to 0.02mol dm -3 . Titration: 1. Firstly the burette should be placed securely in the stand, 10 cm above the surface of the table. 2. Fill the burette with 50cm� of HCl, using a funnel to prevent spillage of the acid. Record the initial volume in a results table. 3. Pipette 25cm� of limewater into a 250cm� conical flask. ...read more.

Conclusion

Record the final volume of HCl in the results table. Then calculate the titres by minusing the final volume from the initial volume. 7. Dispose of the contents in the conical flask; rinse the conical flask with distilled water. Add 25cm� of limewater and five drops of methyl orange. Place the conical flask underneath the burette. 8. Repeat steps 5, 6 and 7 until you have three titres that are all within 0.1cm� of each other. This means that the results obtained are concordant to each other. Safety, Hazards and Preventions: Chemical Name Hazard Precaution Hydrochloric acid (2mol dm -3) Irritant Wear safety goggles and a Lab coat. Calcium Hydroxide (1g dm -3) Minimal Hazard Wear safety goggles Indicator: Methyl orange Skin Contaminant Use a pipette to avoid skin contact. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Aqueous 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 GCSE Aqueous Chemistry essays

  1. Find the concentration of limewater solution Titration

    Method of Dilution Apparatus * 2Mol HCl * 500cm� volumetric flask * 5cm� pipette * Pipette filler * 250cm� beaker * Funnel * Water * Deionised water * I will need to wear a lab coat and gloves To begin with gather the required apparatus and collect the 2mol/dm� HCl.

  2. Plan. In this experiment I intend to discover the exact concentration of an unknown ...

    The reaction between limewater (calcium hydroxide solution) and hydrochloric acid is as follows: Calcium Hydroxide + Hydrochloric Acid Calcium Chloride + Water Ca(OH)2(aq) + 2HCl(aq) CaCl2(aq) + 2H2O(l) The hydrochloric acid provided for the experiment is a 2 mol dm-3 solution; however this is too concentrated to be used for this experiment.

  1. determining the concentration of a limewater solution

    Pilot titration (cm�) 1st titration (cm�) 2nd titration (cm�) 3rd titration (cm�) 4th titration (cm�) Final Reading (cm�) 39.50 41.70 41.00 38.50 40.50 Initial Reading (cm�) 0.45 2.80 2.30 0.00 1.75 Titre (cm�) 39.05 38.90 38.70 38.50 38.75 When calculating the exact molarity of the limewater I will be using

  2. The aim of my experiment is to find the exact concentration of limewater. In ...

    * Phenolphthalein indicator * Methyl orange indicator As the reaction takes place between a strong acid (HCL) and a weak base (Ca(CO)2(aq)), the best possible indicator that should be used in Methyl orange. I have chosen methyl orange for a number of reasons.

  1. The aim of this experiment is to find out the concentration of a solution ...

    This is how you would calculate the exact concentration:- Concentration= n x 1000 / Volume, so Mass / RMM = n, 2.66 / 106 = 0.025 moles 0.025 x 1000 / 250 = concentration = 0.100 moles. 20. Label the standard flask with your initials, the date, the concentration and name of the solution.

  2. To determine the concentration of a limewater solution

    above formula: So By putting in the values V1= C2V2 V1= 0.1? 250 C1 2 V1= 12.5cm3 (to 3.s.f) I will measure out 12.5 cm3 of 2M HCl, before putting this in a volumetric flask. The number of moles in 12.5 cm3 of 2M HCl is as follows: Number of moles = concentration (moles dm-3)

  1. To determine the concentration of Limewater solution

    You can then add very precise amount of the HCl to the substance in order to find the end point using an indicator. By titrating the two substances you can find out how many moles they both need to react with each other.

  2. The aim of this experiment is to determine the concentration of the given limewater ...

    The solution should turn a light orange and proceed to pink at the end of the experiment. By slowly adding the acid into the limewater the point where complete reaction occurs is when the indicator changes colour. This is known as the equivalence point.

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