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

Ideal Gas Constant Lab

Extracts from this document...

Introduction

Lotje Mulder Chemistry HL Dr. Terbush Ideal Gas Constant Lab Aim: To calculate the ideal gas constant. Mg + 2HCl --> MgCl2 + H2 Data Processing: Pressure (kPa � .01) Volume (dm( H2 � .0001) Number of moles H2 Temperature (Kelvin � 1) Gas Constant (J/mol * K) Trial 1 101.27 .032 .0015 298 7.25 Trial 2 101.27 .0322 .0015 298 7.30 Trial 3 101.27 .0323 .0015 298 7.32 Pressure: 30" Hg x 25.4 mm Hg x 101 kPa = 101.27 kPa (� .01 kPa) 1" Hg 760 mm Hg Volume: 32.0 cm( H2 (� .1 cm() x 1 dm( H2 = 0.032 dm( H2 (�.0001 dm() 1000 cm( H2 Temperature: celsius? --> Kelvin 25? + 273 K = 318 K (� .5 Kelvin) Finding the limiting reagent: Moles HCl: N = cv = 3.0 M HCl x .01 dm( = .03 moles HCl Moles Mg: .N = mass/ relative molecular mass ...read more.

Middle

When looked at closely the Magnesium strip is clearly reacting and decreasing in size. Conclusion: From this experiment, the ideal gas constant was determined using the equation PV= nRT. Using this equation should have resulted in a rather accurate constant because the pressure was retrieved from weather.com, which is as far as we know, a reliable source. The volume is measured on the eudiometer, which has an uncertainty of .0001 in dm(, which is a very low uncertainty that shouldn't be a dominant factor in the unreliability of the data. The amount of moles are calculated by hand using the mass of the magnesium. The magnesium was weighed with an inaccurate scale because the uncertainty is .005 grams rather than .001 grams on most scales. The temperature has an uncertainty of .5 K which is also very high because the temperature is measured on a thermometer that is hard to read (which would be a random error), and imprecise. ...read more.

Conclusion

According to the method, the inversion had to be done quickly, as the stopper was held tight, and the eudiometer kept still after it was inverted. This however, was quite difficult and errors may have occurred in the process. The last possible error could have occurred due to an incomplete reaction. To release any trapped bubbles, you had to tap the side of the cylinder, but miniscule bubbles continuously were released for an extra few minutes. This makes it unclear whether or not, bubbles could have continued for even longer. Improvement: After evaluating the method, it is clear that there are a few aspects of the method that can be improved. First, the dropping of the HCl must be done more carefully next time. Secondly, the eudiometer must be inverted into the water with more precision, as well as care. Thirdly, it must be certain that the magnesium is fully reacted before results are recorded. ?? ?? ?? ?? ...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. Faraday's Constant

    Be careful to avoid any movement of the electrodes during the electrolysis. 3) Thorough washing and drying of the electrodes is vital. A tiny amount of moisture left on the electrodes causes a considerable error in the mass calculations. 4)

  2. Universal Gas Constant Lab. Aim: To determine the universal constant for gases by collecting ...

    to the difference in densities between the liquids initially mixed in the solution Effervescence noticed close to the magnesium ribbon This effervescence observed is due to the colorless hydrogen gas being produced as magnesium reacts with the hydrochloric acid Rate of the production of the colorless gas suddenly speeds up

  1. Question: What is the relationship between pressure and temperature of a gas filled container ...

    Hit the reset again and start the final trail. For the third trial, increase the depth of the container to 9nm and pump in a total of 300 heavy species particle. Record the temperature and pressure in a table. The uncertainty in this experiment for temperature is +0.5K and for pressure is +0.5 Pa.

  2. Investigating a factor which may (or may not) affect the value of an equilibrium ...

    Increasing the concentrations of the reactants causes the equilibrium to shift to the right increasing the concentration of the products so that the concentration of the reactants decrease and resotre the equilibrium. In general if a substance is added then the equilibrium will move in the direction that will consume

  1. Finding the Equilibrium Constant for the Ester Formation of Ethyl ethanoate

    Mole HCl = 0.005 x 3 = 0.015 mol This value can be subtracted from each value for the total moles of acid. The below table shows the total moles of acid, the moles of HCl and the moles of ethanoic acid for each solution: Solution Total Moles of Acid

  2. Greenhouse Gas Lab

    Data Table for Methane: Time in Minutes Temperature in Celsius Time in Minutes Temperature in Celsius Time in Minutes Temperature in Celsius 0 25.426427191 17 25.056840228 27 24.964068192 0.5 25.1727970154 17.5 25.056840228 27.5 24.9176797175 1 25.1727970154 18 25.0800322809 28 24.964068192 1.5 25.1032239746 18.5 25.056840228 28.5 24.9176797175 2 25.010454998 19 25.1264153205

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