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

Plan To Determine The Concentration Of A Limewater Solution

Extracts from this document...

Introduction

Plan To Determine The Concentration Of A Limewater Solution In order to determine the concentration of this limewater solution I must perform a titration (also known as volumetric analysis) between the alkali and acid given to me. In order to carry this out I must know the concentration of one of the solutions (in this case the acid, which has been given to me at 2.00 mol dm-3) and the balanced equation between my two reactants; which is: Ca(OH)2 (aq) + 2HCl (aq) � CaCl2 (s) + 2H2O (l) For which the ionic equation would be (as with all neutralisation reactions): OH- (aq) + H+(aq) � H2O (l) Dilution Calculations As the concentration of my acid is 2.00 mol dm-3 I believe this will be too strong, so little will be used and my results will be more unreliable. If I did the experiment with the 2 mol dm-3 HCl: I will be using 25cm3 of sodium hydroxide so there would be: 1 74.1 = 0.0135 moles in 1dm3 of Ca(OH)2 as there is 1g dm-3 so the concentration is 0.0135 mol dm-3 this means there will be 25 � 0.0135 = 0.0003375 moles in the 25cm3 Ca(OH)2 I will use 1000 so the approximate amount of HCl needed to neutralise this will be 0.000746 moles Ca(OH)2 : HCl 1 ...read more.

Middle

from vibrant pink to clear in acid, whereas bromothymol blue is blue in alkaki and yellow in acid but has a halfway point of green so it would be more difficult to determine an exact point). Titration Equipment List And Diagram - 50cm3 burette - burette stand - 25cm3 pipette - pipette filler - funnel - 250cm3 conical flask - white tile - 0.02 mol dm-3 hydrochloric acid - 1g dm-3 calcium hydroxide solution - phenol phthaline I am using volumetric equipment (pipette and burette) so that the measurement errors are lower and my end result is more accurate. The white tile is used so that the colour of the alkali and indicator mixture is more visible and I will be able to determine the end point more easily. Titration Method Set up the equipment as shown in the diagram: attach the burette to the 50cm3 burette stand at a height that allows the burette to be read easily and leaves enough room for the conical flask to be placed underneath Using a plastic funnel, fill the burette up to the 0cm3 mark with the 0.02 mol dm-3 hydrochloric acid made during the dilution process. Remove the funnel so excess drips of acid do not affect the initial volume. ...read more.

Conclusion

(http://www.jtbaker.com/msds/englishhtml/h3883.htm) Calcium Hydroxide - Again the concentration I am using is very low but I will still follow most of the recommended safety practices. Avoid lost term exposure by inhalation by performing experiment in a well ventilated area. If ingested drink two glasses of water then induce vomiting. Has mild irritant properties, so long term contact with skin and eyes should be avoided; I will wear goggles and a lab coat to reduce the chance of any contact being made; but if some is spilt on my skin I will wash the area thoroughly with soap and water; if any gets into my eyes I will rinse with clean water immediately for at least 15 minutes lifting the lids occasionally. Not flammable or reactive. (http://www.sciencestuff.com/msds/C1989.html) I will immediately clean up any spillages using water and a paper towel, and to try and reduce the likelihood of spills I will immediately replace lids onto any bottles of solution once I have finished using them I will also be handing a lot of glass equipment, so I must ensure the burette is firmly held in place by its stand, and I will not leave the burette or pipette anywhere may they roll off and smash. If a breakage does occur I will clear it up immediately using a dustpan and brush and put the shards inside some newspaper before I place them in the bin. ...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 Inorganic 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 Inorganic Chemistry essays

  1. Peer reviewed

    Determining the concentration of acid in a given solution

    5 star(s)

    the H+ ions have reacted and the OH- ions are not in excess. I will therefore use a concentration of approximately 0.10 mol dm-3 as this is the middle value of the possible concentration of sulfuric acid. 1 mole of H2SO4 will react with 1 mole of Na2CO3 Using an

  2. effects Concentration and Temperature on the Rate of Reaction

    1000 = 0.2975g dissolved in enough distilled water to make 250ml of solution. Risk Assessment (6) The following risk assessments are based on concentrated solutions of each substance. The concentrations I will be using are much more diluted that the solutions mentioned below to ensure that my experiment is safer.

  1. Chem Lab report. Objective: To determine the concentration of potassium manganate(VII) solution using ...

    Hydrochloric acid was not used to act as the acidic medium because the chloride ions may undergo oxidation to form chlorine which would act as a reducing agent to reduce the manganate(VII) ions. Then a larger volume of potassium manganate(VII)

  2. Bleaching experiment. Estimation of available chlorine in commercial bleaching solution.

    Likewise, as starch irreversibly combines with iodine at a high concentration of I2(aq) ( so that I2 will not be released from starch at the end point), the starch solution should be added at the later stage of the titration (when the solution just turns from brown to pale yellow).

  1. The Chemistry oh Phosphorous

    (a measure of the phosphorus content in fertiliser). Triple-Superphosphate is made by using phosphoric acid in the place of sulphuric acid, and as result contains 50% P2O5 12. This fertiliser is so effective because it is fully soluble in water, however this can be cause to a major issue concerning pollution to rivers.

  2. Determine the concentration of a limewater solution

    ? = (250/2) x 0.02 = 2.5cm3 of HCl needed for 0.02 mol dm-3. Amount of water needed for dilution = Total Volume - Volume of HCl acid = 250 - 2.5 = 247.5cm3 of water needed. In order to complete the titration experiment you will need a suitable indicator.

  1. Planning an investigation to determine the reactivity of HalogenoAlkanes

    Ref 1 Although the free halide ion may loosely associate with free Hydrogen ions, it will mainly bond with Silver ions, forming an opaque precipitate within the solution.

  2. To study the action of a buffer solution

    pH on addition of 0.1M HCl to ... Buffer Pure water Buffer Pure water 0 cm3 7.0 7.0 7.2 7.1 1 drop 7.0 8.1 7.1 6.8 1.0 cm3 7.3 8.9 7.0 2.4 5.0 cm3 7.4 9.2 6.4 1.6 Table 2 pH of pure water with minimum air exposure pH = 6.9 pH of pure water after 10 minutes air exposure pH = 5.8 Questions : 1.

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