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

Finding the Concentration of Limewater in a Titration Using Hydrochloric Acid as a reagent

Extracts from this document...

Introduction

Finding the Concentration of Limewater in a Titration Using Hydrochloric Acid as a reagent Aim: The aim of this experiment is it to find the concentration of Limewater (g dm-3) in a titration experiment using hydrochloric acid of concentration exactly 2.00 mol dm-3 as a reagent. Equipment: I will need a burette, 25ml pipette, pipette filler, white tile, teat pipette, clamp stand, boss head, clamp, limewater, phenolphthalein indicator, hydrochloric acid, volumetric flask, funnel, distilled water, conical flasks, safety gear and a calculator. Equation: 2HCl (aq) + Ca(OH)2 (aq) --> 2H20(l) + CaCl2(aq) Quantity and concentration of reagent used: 100ml & 2.00 mol dm-3 HCL Method: First things first, Lab coats and Goggles must be worn at all times. This safety rule should not be disobeyed due to fact we are using hazardous chemicals their hazards must be taken into account. The chemicals that we will use are limewater, hydrochloric acid and Phenolphthalein indicator. The hazards are as follows: Hydrochloric acid - Very corrosive, irritant. ...read more.

Middle

(The need for the phenolphthalein indicator is to show the user when a neutralization reaction has occurred as that is the moment when the solution is no longer alkaline and it below PH 8.4) Next, set up the washed & clean burette on the clamp stand and add the dilute HCL into the top of the burette with a funnel, making sure the tap is closed. Fill up to the 0.00ml mark (making sure that the level of the 0.00ml line is at the bottom of the meniscus). Then place the conical flask of calcium hydroxide under the burette and the white tile under the flask. Begin to let the acid pour slowly into the calcium hydroxide and stir the conical flask slowly. When the solution starts to loose its colour slow the rate of the acid more and the moment the solution looses all colour stop, this is the end point. The solution should turn from pink to colourless. ...read more.

Conclusion

= Numb of Mol (N) Volume (V) N = C x V N = 0.20 mol dm-3 x 3.60 cm3 N = 0.20 mol dm-3 x 3.6x10-3 N = 7.20 x 10 - 4 moles Equation: 2HCl (aq) + Ca(OH)2 (aq) --> 2H20(l) + CaCl2(aq) The number of mol. of Ca(OH)2: HCL : Ca(OH)2 2 : 1 7.2 x 10 - 4 moles : 3.60 x 10 - 4 moles Concentration of the limewater in mol dm-3: Concentration (C) = Numb of Mol (N) Volume (V) N = 3.60 x 10 - 4 moles V = 25 cm3 = 0.025 dm-3 C = 3.60 x 10 - 4 moles 0.025 dm-3 C = 0.0144 mol dm-3 = 0.01 mol dm-3 Average: Average = 3.70 cm3 + 3.50 cm3 + 3.60 cm3 3 Average = 3.60 cm3 Concentration of the limewater in g dm-3: To calculate the concentration of the limewater in g dm-3 we multiply the concentration of the limewater in mol dm-3 by the relative molecular mass of limewater. C = 0.0144 mol dm-3 x 74.1 = 1.06704 g dm-3 = 1.07 g dm-3 Rohan Malhotra Chemistry-Titration Mrs Newnham ...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 Organic 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 Organic Chemistry essays

  1. Free essay

    Experiment to determine the order of the reaction of Iodine with Acetone by using ...

    As the concentration of the reactants increases, the frequency of the molecules colliding increases, striking each other more frequently by being in closer contact at any given point in time. Think of two reactants being in a closed container. All the molecules contained within are colliding constantly.

  2. The aim of this experiment is to produce Aspirin. This is an estrification in ...

    used 16.90 cm3 16.70 cm3 16.75 cm3 Concordant results 16.70 cm3 16.75 cm3 Mass of aspirin used Accurate 1 = 0.3178g Accurate 2 = 0.3047g Accurate 3 = 0.3032g BACK TITRATION Apparatus * Aspirin * Burette * Burette stand * Conical flask * Methyl red indicator * Hydrochloric acid 0.1

  1. Comprehensive and Detailed Chemistry notes

    flame resistant with additives, water resistant rigid pipes and gutters, flexible raincoats and shower curtains styrene ethenylbenzene polystyrene transparent, due to few crystals, when gas added forms foam compact disc cases, heat insulation, floats 2. SOME SCIENTISTS RESEARCH THE EXTRACTION OF MATERIALS FROM BIOMASS TO REDUCE OUR DEPENDENCE ON FOSSIL

  2. investigating the amount of ascorbic acid present in fruit

    you may start to begin the titration by adding NBS solution to the solution in the 250cm3 conical flask. 16. Swirl the 250cm3 conical flask whilst adding in the NBS solution. 17. If the colour of the solution starts to changes colour slightly then goes back to its original colour, add in the NBS solution drop by drop.

  1. Aim: To determine how the concentration of each species in a reaction affects the ...

    out slowly * Need to undergo more than one trial for each concentration * Stopwatch needs to be tested before use * High degree of accuracy is required when producing the different concentrations * Cross constructed needs to be extremely large and clear * Need to know which apparatus is

  2. Chemistry Investigation - How does chain length affect: ∆Hcè for alcohols?

    SAFETY: * Alcohols are being used and are extremely flammable. For this reason, fire retardant lab-coats should be worn and long hair tied back. Furthermore, all paper and material should be on a separate bench during the combustion process.

  1. Finding the concentration of an acid sample

    Below is a comparison of some major Indicators: indicator pKind pH range litmus 6.5 5 - 8 methyl orange 3.7 3.1 - 4.4 phenolphthalein 9.3 8.3 - 10.0 As you can see the only one in range is the Methyl Orange Sodium Carbonate Because I will need a 250cm3 sodium carbonate solution.

  2. Determine the Concentration of Limewater Solution

    is the following: RMM of Ca = 40.1 RMM of O2 = 32.0 RMM of H2 = 2.0 = 40.1+32.0+2.0 = 74.1 Concentration in mol dm-3 = concentration in g dm-3 / RMM = 1/74 = 0.0135 mol dm-3 of Calcium Hydroxide used in this equation.

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