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

Determine BaCl2.2 H2O -Gravimetric Analysis Lab

Extracts from this document...


Mark Levi Chemistry Gravimetric Analysis Lab Data Collection Quantitative results for the weight of the crucible during the experiment What is Being Measured Mass (� 0.01 g) Crucible and Lid 26.64 Crucible, Lid and Barium Chloride Sample 28.65 Crucible, Lid and Barium Chloride Sample after 1st heating session 28.37 Crucible + Lid and Barium Chloride Sample after 2nd heating session 28.38 Crucible + Lid and Barium Chloride Sample after 3rd heating session 28.38 Observations Before, During and After the Experiment Heating Session Before During And After First Substance in crucible is chips of lucid, white, shiny solid. The solid does not seem to show any major appearance changes Second Solid, white, shiny small flecks. The solid seems to look like powder Third White, shiny, solid in semi-powdery form. No changes being viewed Data Processing and Presentation Calculations Initial Mass of Hydrated Barium Chloride: 28.65 � 0.01g (Mass of Crucible and Lid and Barium Chloride Sample) - 26.64 � 0.01g (Mass of Crucible and Lid) = 2.01 � 0.02g (Mass of Hydrated Barium Chloride before any heating process) Mass of Barium Chloride after 1st Heating: 28.37 � 0.01g (Mass of Crucible, Lid and Heated Barium Chloride after 1st heating) ...read more.


by the Molar mass of water = Number of moles of water removed from Barium Chloride] Consequently, the experimental ratio of Barium Chloride and Water in BaCl2.x H2O is 1:2. This is because when you divide each number of moles of water and barium chloride in the experiment by the smallest value - 0.01 it gives such a ratio From this ratio we can establish the X value in this formula. Hence, it would be 2 due to the fact that we gathered from the ratio that there are 2 hydrogen molecules for every Barium Chloride. Therefore the full equation for hydrated barium chloride is BaCl2.2 H2O. Conclusion From my research I have found out that the accepted value of hydrated barium chloride's formula is BaCl2.2 H2O. Moreover, the formula that I have determined from the experiment is also BaCl2.2 H2O, which means that I have successfully accomplished in getting near to the theoretical formula of hydrated barium chloride Evaluation Firstly, I would like to recognize two types of errors. First, the random errors: Random errors are unidentifiable and cannot be eliminated. The effect of random errors can be reduced by carrying out the investigation number of times. ...read more.


Thus strengthening the flame and using a pure blue flame might have helped make a more accurate experiment. Another systematic error would be how impurities in the barium chloride might have altered the results. The barium chloride might have been impure to start off with. A way of approaching this issue would be to buy the sample from a famous or well known brand. Finally, the last issue that I would like to indicate before ending this report is another major factor that have might influenced my results. A possible inaccuracy of this experiment could be a result of dust forming on the crucible during the heating process by the flame. In this scenario, I utilized the blue flame from the Bunsen burner, which is less dirty than the yellow flame. Nevertheless, if dirt formed on the crucible its mass would be changed, hence, making results imprecise. Another possible circumstance where dirt could have been transferred is from the tongs. While lifting the tong, some dirt might have spilled on the crucible; again, this would certainly affect the mass of the crucible. This error would have been eliminated if clean tongs were to be used. ...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 Classifying Materials 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 Classifying Materials essays

  1. Marked by a teacher

    In this CDA I will write about how plastic bags are made, why plastic ...

    My personal opinion is that plastic bags are okay as long as awareness is increased for us to recycle plastic bags instead of throwing them away. The reason why I believe that plastic bags are okay is because they are the best option at the moment for easy, convenient, light, strong and cheap packaging.

  2. Gravimetric determination of water in Hydrated Barium Chloride

    Conclusion: - The calculated values of 2.23 and 2.05 mol of water of crystallisation were slightly higher than the actual value of 2 mol. The fact that in both attempts the final two mass readings are the same is indicative that the crucibles contents have reached constant mass, and the BaCl2 is therefore anhydrous.

  1. Iron Oxalate Lab

    Dilutions Abs [Fe+2] 0.1 0.795 0.000111251 0.00111251 0.2 na na 0.3 0.303 4.24E-05 1.41E-04 0.5 na na 0.7 0.319 4.46397E-05 6.3771E-05 average= 0.000439206 intial[Fe +2] 0.01098015 M %Fe 11% Empirical Formula Fe+ 11 g 11/55.85 .1525 moles 1 C2O4-2 55g 55/82.02 .6248 moles 3 Percent Yield = 1.848/ 1.3 =


    Graph 1: Graph 2 Scientific Analysis: As seen from the 'graph 2', as the cooking time increases the percentage increase of the spaghetti does as well. There is a strong positive correlation between the cooking time and the percentage of mass increase, this is supported by the linear equation for the line of the best fit (y= 19.439x).

  1. material science unit 2 task 2

    2. Have a lower density than most metals. 3. Stronger than metals. 4. Break easily (very brittle) 5. Low ductility and plasticity. 6. High melting point. 7. They don't conduct heat or electricity. 8. Erosion resistant 9. Resistant to strong acid and alkali. 10. Very tough and stiff. 11.

  2. The role of mass customization and postponement in global logistics

    Customers typically define the offering from "the ground up" (i.e. they customise the offering). The company then assembles the product and delivers it according to the customer's delivery specification. With some products there is an ongoing adaptation of the unique product or service.

  1. Organic Qualitative and Quantitative Analysis

    was followed to test for the secondary alcohol. 2 ml of Lucas reagent were allowed to react in a test tube with five drops of the secondary alcohol. The test tube was shaken and the observations and the reaction time were noted down. v. The characteristic odour of the ester was distinguished from other odours and noted down.

  2. Gravimetric analysis for Chloride Ion.

    A 0.25 gram sample of unknown 547 was weighed accurately on an analytical balance using a clean, dry weighing bottle. 2. 0.2638 grams of the unknown was transferred into a 250mL beaker and 100mL of distilled water and was added.

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