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

To calculate the percentage composition of the mixture of Na2CO3 + NaHCO3

Extracts from this document...

Introduction

Chemistry lab report 4 Aim - To calculate the percentage composition of the mixture of Na2CO3 + NaHCO3 Procedure 1) Weigh a perfectly dry crucible with properly fitted lid. 2) Weigh the crucible with 1 gram of the mixture. 3) Heat the crucible with a partially open lid for 10 minutes with low flame and gradually increase the flame. 4) Keep heating for 30 minutes. 5) Place the crucible to a dessicator. 6) Weigh the cooled crucible and note it down. Equipment used - 1) Crucible 2) Weighing machine 3) Dessicator 4) Bunsen burner 5) Tripod stand 6) Lighter 7) The mixture Qualitative analysis - 1) The cooling process was time consuming. 2) When the heating started, there were some fumes evolved. 3) ...read more.

Middle

After Heating, Mass of the crucible + 0.001g Mass lost after heating + 0.002g 1 27.385 28.222 0.837 28.000 0.222 2 30.238 31.188 0.950 30.951 0.237 DATA PROCESSING 2NaHCO3 ---- Na2CO3 + CO2 + H2O Molar mass of 2NaHCO3 = 168 Molar mass of CO2 + H2O = 44 + 18 = 62 As we know the mass of - CO2 + H2O = 0.222 + 0.002g in the first attempt. This was calculated by Mass lost after heating = (Mass of crucible + mixture) - (After heating mass) This mass loss is the mass of H2O + CO2 which evaporates during the heating process. ...read more.

Conclusion

Therefore, the uncertainty for the final value of NaHCO3 71.9 + 0.4% And Na2CO3 = 28.1 + 0.4% Because the percentage uncertainties are added. The final answer for the second attempt was = NaHCO3 = 67.6 + 0.3 % Na2CO3 = 32.4 + 0.3% Conclusion - My final result would be 30.25 + 0.6 % as it is the average of both the attempts made. The real value of the composition is 30 % It is quite close and can be concluded that the answer is not exact due to some human errors or impure mixtures. Evaluation - 1) The answer could have been more accurate and precise if I would have repeated the experiment once more. 2) Could have used better equipment with more precise readings 3) Made sure that the mixture used was pure. ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate 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 International Baccalaureate Chemistry essays

  1. A study of trends in period 3

    data analysis from data table 1 were based only on the 1st 3 oxides in the period.

  2. Preparation of ear drops practical. Titration of NaHCO3

    Molar of mass of NaHCO3 = 84 grams moles x molar mass- 0.61 x 84 = 51.24 grams per litre. To calculate the amount per 100ml divide it by 10 51.24/10= 5.124 grams per 100 ml The calculated amount

  1. Stoichiometry Lab Report. Aim: To determine what solid product is produced in the ...

    This is reaction stoichiometry. With this ratio, composition stoichiometry can be used to calculate the amount or the weight of the products with any given mass or number of moles of the reactant. 1. NaHCO3 --> NaOH + CO2 2.

  2. Chemical monitoring and management - composition of the atmosphere and the problems of pollution.

    Temperatures here go up to a staggering 1700 degrees. Chemical reactions occur faster in this part of this atmosphere. 2. Identify the main pollutants found in the lower atmosphere and their sources pollution Source ( natural ) Source( artificial ) Carbon monoxide Bushfires, volcanoes, decomposition of flora and fauna Incomplete combustion of fuels in vehicles Nitrogen oxides Bushfires, lightning,

  1. Jello Extended Essay 2

    (Attached in appendix) After I gathered all the materials, I started to make the jell-o. To make the jell-o, I mixed a box of jell-o powder and one cup of hot water (140�F) together in a medium bowl. Then I stirred the solution with a spoon until as much of the powder is dissolved as possible, approximately two minutes.

  2. FInding the percentage purity of CACO3 in egg shell

    were taken in order to neutralize the acid and the base and find the acid left over and hence complete the back titration process Trial Start point (cm3 /±0.02 cm3) End point (cm3 /±0.02 cm3) Titre Value (cm3 /±0.02 cm3)

  1. Measuring the fatty acid percentage of the reused sunflower oil after numerous times of ...

    Be careful while taking the samples from the main frying oil, try to take at least 15 g (at the beginning of the frying process, measure 5 grams of oil and put it into a graded burette and write down the value in ml to be able to take the same amount while taking samples)

  2. Finding thr Percentage Composition of Magnesium Oxide

    The white ash was crushed with a stirring rod (amendment: because the procedure for Part B was missing; the white ash was not crushed). Enough distilled water to cover the contents was added to the crucible. It was heated once again for about two minutes in order to evaporate the

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