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

Making Copper (II) Sulphate Stock Solution evaluation

Extracts from this document...

Introduction

Making Copper (II) Sulphate Stock Solution When creating my stock solution of Copper (II) Sulphate I accurately weighed out approximately 24.96g of Copper (II) Sulphate crystals on a 3 decimal place balance. I used the weighing by difference method to accurately obtain an exact weight for the crystals. This required me to weigh the mass of the weighing boat and the crystals, add the crystals to a beaker and then re-weigh the empty boat at the end. The masses I gathered from the weighing are as follows: Mass of boat and crystals first = 26.88g Mass of empty boat after = 1.926g Actual amount of crystals = Mass of boat and crystals first - Mass ...read more.

Middle

I have made up with distilled water in the 1dm3 flask by using the equation: Concentration = Number of Moles Volume c = n v c of CuSO4.5H2O = 0.099975961 mol 1 = 0.099975961 mol dm-3 = 0.100 mol dm-3 (3sf ) Due to the apparatus I used in the experiment there is a possibility that the concentration I have calculated is not exactly right; this is known as the precision error. To calculate the precision error I need to calculate the percentage uncertainty of each piece of apparatus that I used and then add them all together to give a total percentage uncertainty: % uncertainty of the 3dp balance = (5 x 10-4) ...read more.

Conclusion

mol dm-3 100 = � 8.397980724 x 10-5 Now that I have the percentage error I can show the possible errors that there could be in the calculation of the concentration of CuSO4.5H2O: Highest possible c of CuSO4.5H2O = 0.10005994mol dm-3 Lowest possible c of CuSO4.5H2O = 0.099891981 mol dm-3 However I will represent the final concentration I have calculated of the CuSO4.5H2O as: x 0.099975961 � 8.397980724 x 10-5 mol dm-3 0.100 � 8.40 mol dm -3 (3sf) The figures I used to calculate the errors from I obtained from the British Standard maximum permitted errors (tolerances) for volumetric glassware table from my chemistry laboratory. All of the glassware used is of grade B standard. ...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)

    I ran out 25cm3 of the sulfuric acid as I knew the endpoint was around there. The colour was slightly darker than the colour of the endpoint so I knew that slightly less acid was needed to reach the endpoint.

  2. Peer reviewed

    Deducing the quantity of acid in a solution

    5 star(s)

    Making the solution: Equipment needed: * Electronic balance: an electronic balance measures to 2 decimal places; this will give us an accurate weight of the solid used. * Weighing boat A weighing boat is a container used to prevent reagents from contacting the balance pan.

  1. effects Concentration and Temperature on the Rate of Reaction

    89.3 89.4 89.24 0.0112 0.003 112.9 113.5 112.7 113.2 113.3 113.12 0.0088 Graph 3 on the next page shows the concentration of potassium bromide plotted against reaction rate. The line of best fit is once again a straight diagonal one.

  2. Determination of the formula of hydrated Iron (II) Sulphate crystals (FeSO4xH2O)

    125 125 18 = 6.94 Round 6.94 value up to 7 Therefore the formula of FeSO4xH2O is: FeSO4(H2O)7 Evaluation Method 1 The main measurement error in this method was the balance as it was only accurate to two decimal places Balance percentage error = 0.05 x 100 = 3.4% 1.48

  1. To study the action of a buffer solution

    measure & record the pH changes on addition of 0.1M NaOH (0 cm3 , 1 drop , 1.0 cm3 and 5.0 cm3) in Table 1. Rinse the electrode in distilled water & stand it in a flask of distilled water.

  2. analysis of two commercial brands of bleaching solution

    4) 25 cm3 of this solution was pipetted into a 250 cm3 conical flask. 5) 10-15 cm3 of 1M potassium iodide solution was added to the conical flask. 6) 10-15 cm3 of 1M potassium iodide solution was added to the conical flask.

  1. Thermal Decomposition of Copper Crabonate

    0.0033 �2 1/2 = 0.0013333 So one mole of copper carbonate = 0.001333333, but we need 2. 2 x 0.0013333333 =0.002666666667 moles of CuCO . This means that 0.0033 mole of gas will require 0.00267 mole of copper carbonate. From equation 2, we can see that 2 moles of gas requires 2 moles of copper carbonate.

  2. Percent Yield Experiment. The limiting reagent for this experiment is strontium chloride hexahydrate. ...

    Secondly are impurities accumulated through water. Non-distilled water can contain many minerals and impurities , aswell as absorbing chemicals in the surrounding air which can skew results. According to the city of Ottawa's website, there are many contaminants in water, the two of those being fluoride and chlorine.

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