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

The Relative Formula Mass of a gas by Effusion

Extracts from this document...

Introduction

The Relative Formula Mass of a gas by Effusion. Name: Suleman Esam Date: 25/10-07 Purpose The purpose of this experiment is to determine the unknown in the following acid base reaction: H X(g) + NH3(g) ? NH4Cl(s) Background Effusion is escape of molecules through a small hole. Some gases effuse faster then others. According to the Graham's law, the rate at which a gases effuse depend on their mass. Graham's law tells us that the rate of effusion of a gas is inversely proportional to the square root of its relative formula mass. Equipments - Glass tube - Cotton swabs - NH3 - Acid - Goggles - Gloves - Crucible tongs - Ruler Procedure 1. ...read more.

Middle

4. As a final point, we recorded the distance between the reaction point and the two ends. Result The compound of base and acid were: 19.6 cm = 20 cm �1 cm (4.76%), away for the acid 31.4 cm = 30 cm �1 cm (3.23%), away from the base The distance that the molecules travel is proportional to the kinetic energy. The kinetic energy is given by: KE= 1/2mv2 In this case, since they both had the same temperature, the will look like this: KEA=KEB 1/2mvA2= 1/2mvB2 mAvA2= mBvB2 vA2/vB2= mB/mA vA/vB= V(mB/mA) "v" (velocity) stands for rate of effusion. ...read more.

Conclusion

Y= 38 �7.99% Conclusion The molar mass of the acid is 38. The acid contains one hydrogen atom, so the molar mass of the X is 37. Now there is no atom with molar mass of 37, so the two closest atoms to this molar mass are Cl and AR. When Cl binds with hydrogen, they form an acid, so X is Cl. With that known, we can complete the formula for the reaction. HCL(g) + NH??g??? NH4Cl(s) Errors - The two cotton swabs might not have been plugged inn simultaneously into the tube. - The solid that was made between the base and acid, had an area of approximately 2 cm and that increased the uncertainty. Improvements The experiment could have been more effective, if we had repeated the experiment several times to get a more precise result. ...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. Can one determine the coefficients of a balanced chemical equation by having the mass ...

    chloride reactant should be transformed in this reaction. This means that when the reaction is finished, there should still be some aluminum since it is excess, and the products should be copper and aluminum chloride. Since aluminum chloride is a clear solution, when the solution turns clear, it indicates that the reaction has finished taking place.

  2. im To determine the relative molecular mass of chloroacetic acid ClCH2COOH

    This is indicated by the small percentage error in the result (0.5%). However, there were sources of error in the experiment. Sources of error 1. Human parallax error in taking volume measurements: the meniscus might not have been viewed at right angles.

  1. Espuma a base de cscara de pia

    En esta monograf�a explicar� acerca de la espuma hecha con poliuretano. 4.1 OBTENCI�N DEL POLIURETANO El poliuretano es la poliadici�n del uretano. Este �ltimo se obtiene al hacer reaccionar un poliol con un isocianato. El isocianato es una sal de cianato, proveniente del �cido isoci�nico.

  2. Determining the relative atomic mass of Lithium

    H2 gas being lost Our system for gas collection was imperfect and it is possible that gas was lost through the hole in the bung and in the time taken to place the bung on the conical flask. This would have decreased our recorded value of H2 and thus decreased our value for the relative atomic mass of lithium.

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