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

Chemistry Lab report - Production of Lithium

Extracts from this document...

Introduction

Lab Report Determine the Relative Atomic Mass of Lithium The aim of this experiment is to determine the R.A.M of Lithium by measuring the volume of H2 gas produced by reacting 0.1 grams of Lithium with water. 2Li(s) + 2H2O(l) --> 2LiOH(aq) + H2(g) Lithium is a group 1 metal therefore it is very reactive. It reacts with water to form H2 which is the dependant variable. Throughout the experiment I kept the mass of lithium constant, 0.1g, to provide an accurate experiment. I also used the same initial amount of water with the same equipment. Equipment Conical flask with bung Delivery tube Measuring cylinder (250 ml) Measuring Cylinder (50 ml) Water Pan Balance Large Bowl Lithium (0.1 g) Safety Goggles and Gloves Tweezers 1) First, I completely filled the 250 ml measuring cylinder with water (using the 50ml measuring cylinder). ...read more.

Middle

(+/- 2.00) Mass of Lithium (grams) (+/- 0.01g) 1 250 230 0.10 grams 2 250 192 0.10 grams 3 250 235 0.10 grams 4 250 186 0.10 grams 5 250 208 0.10 grams Uncertainties +- 0.01 grams (pan balance) - (0.01 / 0.1) * 100 = 10% +- 2 cm3 (measuring cylinder) - (2 / 250) * 100 = 0.8% Total Uncertainty = 10.8% Processed Data With this data, I was able to determine the R.A.M of Lithium. (1 mole of gas occupies 24dm3 at room temperature and pressure) 1) I used the average of all of the results. 230 + 192 + 235 + 186 + 208 = 1051 1051 / 5 = 210.2 cm3 2) Moles = Volume / 24 dm3 Therefore --> (210.2/1000) / 24 = 0.00876 moles of H2 3) 2Li(s) + 2H2O(l) --> 2LiOH(aq) ...read more.

Conclusion

* Some H2 escaped from the time when the lithium was placed in the conical flask, to when the bung was placed on it. This time delay caused inaccuracy. This probably caused the end result to be different and not accurate. For improvement, the lithium should have been suspended in the water with the bung in place by being tied to a string then released. * The pan balance is not the most accurate piece of equipment to measure mass. This gave inaccurate results for the mass which in turn affected the final result. * A measuring cylinder is not the most accurate piece of equipment to use to measure the amount of gas produced. A Gas jar should have been used to measure the volume of H2 produced, which is more accurate. Safety and Precautions There are many precautions to take in order to insure a fair and accurate experiment. Gloves Safety Goggles Handle Lithium with tweezers Wipe oil off Lithium ?? ?? ?? ?? Sheheryar 1 ...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. IB Chemistry - Charles' Law Lab Report

    Therefore, there was not significant reduction. Absolute zero is the coldest temperature that the atoms can be which is -273?. When the atoms are all stopped the gas is absolutely as cold as can be so we call this phenomenon as absolute zero.

  2. IB chemistry revision notes

    Trends across the Third Period Bonding Structure Conductivity Melting Point Reaction w/ Water Na Metallic Body Centred Cubic Good High Basic Mg Metallic Hexagonal Close-packing Good High Basic Al Metallic Face-centred Cubic Good Higher Amphoteric Si Giant Covalent Diamond Type Semi-conductor Highest Amphoteric P Simple or Giant Trigonal Piramidal Insulator

  1. IB Chemistry - Boyle's Law Lab Report

    According to the Boyles' law, Pressure*Volume has constancy because pressure and volume are inversely related to each other. To find out the pressure, I had to fine out the mass and the area of contact because the pressure has a formula (Mass/Area).

  2. Indicator Lab Report - investigating acid-base reactions

    and an equivalence pH of 7. The literature value for titrating 25ml of a weak base with a strong acid is that 25ml is needed, with a steeper buffer region and shorter equivalence point and an equivalence pH of 8.73. These results are similar to the acquired results since the amount needed to change the solution

  1. titration experiment report

    Processed data: Equations used Part 1: > n() = m()/ M() C()= n (CaCO3) / V(solution (Water)) > Volume of used to neutralize HCl= finishing record - starting record > n () =CV > n (HCl) = 2 n() > C (HCl) = n(HCl) / V (HCl)

  2. Change of Potential Difference in Voltaic Cells Lab Report

    U- shaped glass tubing is not available to connect the two half-cells. Calculation: 1M of KCl solution can be prepared in the same way of the previous solutions. Molar mass of KCl is 74.55 g/mol. This mass is for preparing 1L which is the volume needed for 5 voltaic cells (5 concentrations of copper sulfate).

  1. Experiment to find the relative atomic mass of lithium

    A method to try and avoid this error could be by tying a piece of string around the lithium and placing it in the flask with your partner at the ready to place the bung on top.

  2. Determining the relative atomic mass of Lithium

    4.3% Conclusion Theoretical or Accepted Result 6.9 Experimental or Actual Result 7.2 Percentage Error 1.39% Calculated random error % The percentage error of 1.39% is smaller than the calculated random error of 9.72%.

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