• 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...


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.


* 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.


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. determining the concentration of a limewater solution

    It is also important to note the initial and final volumes of hydrochloric acid for each titre accurately so as to keep error down to a minimum. Dilution: It is important to dilute the hydrochloric acid to a suitable strength to allow for a more accurate experiment.

  1. 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.

  2. To determine the concentration of Limewater solution

    The answer is that the purpose of a screened indicator is to produce a more noticeable colour change at the end point. These types of indicators are made up of either a mixture of two indicators, or a mixture of an indicator and an 'inert dye'.

  1. To determine the concentration of a limewater solution

    This will be needed to measure out the HCl. * A funnel which will aid me in putting the HCl into the burette and I will also need a white tile, which will help me to clearly see the reaction taking place Dilution As I've stated above, I'll be provided with 2M hydrochloric acid.

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

    Rinse out a clean 250 cm� standard (graduated) flask thoroughly with distilled water, to ensure that there is no residue left in the bottom of the flask, from previous experiments, which would intrude with the solution being made. 12.

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

    + 2HCl(aq) CaCl2(aq) + 2H2O(l) Ratio... 1 : 2 Looking back at the original equation it is seen that for every one mole of calcium hydroxide solution (limewater), two moles of Hydrochloric acid are required. Therefore... Moles of Ca(OH)2 x 2 = Moles of HCl 3.375 x 10-4 x

  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