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The Decomposition of Sodium Hydrogen Carbonate

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Introduction

The Decomposition of Sodium Hydrogen Carbonate Aim: the aim of this investigation is to find out the product of decomposition of Sodium Hydrogen Carbonate (NaHCO3). Hypothesis: we were given three possible products: 1. Sodium Oxide (Na2o) 2. (CH3CO2Na) 3. Sodium Carbonate (Na2CO3) I predict that the equations that will balance out will be considered a possible product of the reaction. The equations that will not balance out will not be considered a possible product. This is because all equations have to balance out, provided with the correct reactant and products are given. And due to this reason, the equation that will not balance will not be considered a possible product. The equations are the following: Equations of the Reaction Is it a possible Product? 2NaHCO3 --> Na2O + 2CO2 + H2O The equation balances out, and it can therefore be considered a possible product. NaHCO3 --> CH3CO2Na + CO2 + H2O The equation can not be balanced, and it can not be considered a possible product. 2NaHCO3 --> Na2CO3 + CO2 + H2O The equation balances out, and it can therefore be considered a possible product. ...read more.

Middle

4. After the results above were collected, you can now start with the experiment. However more accurate results will be obtained if the lid was placed on the crucible at the start of the experiment. This will also minimize the powder loss. 5. The lid should be on the crucible every time the experiment is repeated; this will ensure a fair test. 6. After the variables above have been controlled, you can light the bunsen burner and start the experiment. 7. The time to heat the mixture should always be the same, to ensure a fair test. You should aim to heat the mixture at least five minutes. 8. After you have heated the mixture, you should measure the mass of the crucible with the lid still on. You should also keep a record of the masses. 9. The mixture should be heated at least three more times, to make sure that the reaction is complete. 10. You should also make sure that the lid is always on the crucible, and you should make sure that the heating time is only five minutes. ...read more.

Conclusion

So we know that Sodium carbonate is the product of the decomposition of Sodium Hydrogen Carbonate. Conclusion: After having carried out the experiment, and examined the results, I have found out that my hypothesis was correct. I predicted that only two of the given products, could be possible products. This is because their equations balanced out, and the equation of the third one did not balance out. So it could not be considered a possible product. Evaluation: The experiment went smoothly, and accurate results were collected, however some changes could be done if the experiment was carried out again. One of the changes would be more accurate mass measurement. This could have been done by measuring the mass of the variable three times, and then averaging the result. This would have given us more accurate masses, since the masses are key factors in obtaining the product. Another change would be the time taken to measure the crucible. We could set a three minute break after each five minute heating. By doing that the heat that was lost by the mixture could be kept constant the whole time. We also started heating the mixture without a lid on top of our crucible, which caused in the loss of powder. ...read more.

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