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

Determination of the concentration of limewater solution

Extracts from this document...


A-LEVEL CHEMISTRY Assessed Practical 2 (AS) DETERMINATION OF THE COMCENTRATION OF LIMEWATER SOLUTION Introduction In the course of this experiment I am going to find the concentration of Limewater in a solution. I am provided with 250cm3 of limewater, the limewater has been made so it contains an approximate 1g dm3 of Calcium Hydroxide, I am going to be provided with Hydrochloric acid (HCl) which will have a concentration of 2.00mol dm3, it is advised that this acid is actually too concentrated and should be diluted. All the equipments will be provided for me such as the indicators for the experiment and my initial plan for this experiment is to design an approach I could take to find the concentration of limewater by choosing a different range of equipment and a safe procedure. I predict that the more the limewater concentration the more calcium chloride and the more water that will be produced. Aim The aim of this experiment is to find the concentration of limewater solution in g dm3 so I am going to find the molarity of ...read more.


So the whole point of the experiment is to find out the concentration of limewater and this can be done by reacting the Hydrochloric acid with the Limewater and the equation for this is When it comes to deciding which indicator is best suited for the reason you take in to account that some measurements will be determined by colour and the one indicator that come to mind is phenolphthalein because it is mainly used for colour indication. However from my research I found that there another chemical that could also be used for the experiment is 'methyl orange' because this indicator has a relative pH scale which is around 4-7 keeping in mind that the limewater is also a weak acid base so this more suitable compared to the phenolphthalein as it has a higher pH scale compared with the limewater. It is also advisable that the hydrochloric acid to be diluted in order to prevent the reaction from happening too fast. ...read more.


THE METHOD FOR THE EXPERIMENT 1. Firstly set up the apparatus by attaching the clamp and stand supporting the pipette over the volumetric flask, make sure that you wear a protective glove and goggles when dealing with the chemicals. 2. Use the 25cm3 of the aqueous limewater into a 250cm3 conical flask. 3. Use a minimum of 3 drops to a maximum drops of the methy Orange or the phenolphthalein indicators to the limewater. 4. Then titrate with respect to the 0.1mol dm3 of the HCl I have chosen to use. 5. Then make sure you write down how much of the HCl acid used and write down your result as soon the solution becomes colourless 6. Record your results in a table 7. Repeat the titration for at least three times making sue that you use 0.1cm3 to keep the results constant. 8. Then you can workout the average for the titration. TITRATES Limewater formed (cm3) How much of the phenolphthalein used (cm3) 1st 2nd 3rd Average Bakhid Cawaale Centre no: 10266 ...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. Titrating Sodium hydroxide with an unknown molarity, against hydrochloric acid to find its' molarity.

    * I had to judge what I felt was the end point of the titration (a light pink) and with each titration I had to make sure that the end point was the same or as near to the same colour as possible.

  2. The Determination of an Equilibrium Constant.

    The overall Kc value is going to be the average of the four. 3. Kc is assumed to be small because the reverse reaction can take place even in room temperature. Procedure: * Pipette a 1.0 cm3 sample from each mixture into a conical flask containing 100 cm3 of distilled water.

  1. Find the concentration of limewater solution Titration

    Which, in this case, is approximately 50cm3. Place the remaining HCl on a white tray out of your way. Remember to remove the funnel before you take the initial reading. Using the 25cm� bulb pipette measure out 25cm� of Ca(OH)2 and place it in the conical flask.

  2. The Concentration of Limewater Solution.

    The distilled water is needed in a large and small container, so that the volumetric flask can be filled quickly with the large container first, and then the final small additions of water can be made with the small bottle.

  1. Determine the concentration of a limewater solution.

    what values the straight line falls upon, any indicators within this range will be acceptable. This means that any indicators, which work between the pH values 2-9, will be applicable. The following list shows the indicators I can use. pH range Methyl yellow 2.9 - 4.0 Methyl orange 3.2 -

  2. Determining the concentration of a limewater solution.

    The general equation for a neutralisation reaction is: Acid + Metal Hydroxide Metal Salt + Water The word equation for this particular reaction is: Limewater + Hydrochloric Acid Calcium Chloride + Water + Hydrogen The balanced symbol equation for this particular reaction is: Ca(OH)2 (aq) + 2HCl (aq) CaCl2 (aq)

  1. determining the concentration of a limewater solution

    � 2 = 74 This shows that there are 74g dm�� of Ca(OH)2 in a 1 molar solution of calcium hydroxide. However approximately 1g dm�� is in my solution. To calculate the exact amount of calcium hydroxide in the given solution I must do the following calculations: 1g = 0.0135

  2. Determining the concentration of a limewater solution. This procedure will require a titration of ...

    that one mole of limewater reacts with two moles of hydrochloric acid. The limewater is approximately 1.00g dm-3 this is 0.0135mol dm-3 as the molecular weight of calcium hydroxide is 74 g dm-3 ? mr = mol dm-3 1.00 ?

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