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

Determination of the Valency of Magnesium

Extracts from this document...

Introduction

Experiment 6 Title: Determination of the Valency of Magnesium Objectives: In this experiment, we can know about the quantitative relations between amounts of reactants and products of a reaction so that the stoichiometry reaction can be determined by a known mass of magnesium and a measured collection of hydrogen gas. Introduction: In chemistry, stoichiometry is the study of the combination of elements in chemical reactions. Stoichiometry refers to the relative number of atoms of various elements found in a chemical substance and is often useful in characterizing a chemical reaction. The related term stoichiometric is often used in thermodynamics to refer to the "perfect mixture" of a fuel and air.Stoichiometry is often used to balance chemical equations. ...read more.

Middle

A comparison of the amount of hydrogen produced with the amount of magnesium consumed will enable X value to be determined. Apparatus and Materials : * Magnesium ribbon * HCl(0.5M) * Burette (50cm3) * Pipette (25cm3) * Retort stand * Electrical Balance * Watch glass * Beaker(500cm3) * Gauze * Funnel * Rubber band * Glass rod * Thermometer * Barometer Procedures: 1. A burette is used upside down to collect the hydrogen gas, but there is an unmarked space between the 50cm3 mark and the tap of unknown volume. The space is determined in a clean, dry 50 cm3 burette by pipetting 25.00cm3 of water into the vertically clamped burette right way up. ...read more.

Conclusion

The burette was filled completely with 0.5M HCl, and invert it with fingers and place it in the water in the beaker. The finger was removed and place the end of the burette over the stem of the funnel, ensuring no air enters it and clamp it into position. 5. The excess of water was removed with a pipette until the level is just above the stem of the funnel. 6. About 100cm3 of 0.5M HCl is added to the beaker by using a glass stirring rod to ensure complete mixing such that the HCl reaches the magnesium. Some tapping with the glass rod on the watch glass was did to help to fasten the reaction. 7. The solution was stirred to initiate the reaction but not too further so that the reaction proceeds unaided. At the completion of the reaction, the watch glass is tapped gently to dislodge any gas bubbles. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Patterns of Behaviour 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 GCSE Patterns of Behaviour essays

  1. Rates of reactions between HCL and magnesium ribbon.

    Hydrochloric acid is a common laboratory acid. Extracts from: a chemistry coursework from an Internet source and The HUTCHINSON Dictionary of SCIENCE second edition. Before looking at the factors that can alter the rate of reaction, we must consider what happens when a reaction take place.

  2. The determination of a rate equation

    Concentration of Reactant (H+ or S2O3�-) I already know that the rate equation will be as shown below: Rate = [H+ (aq)]? [S2O3�-(aq)]? As you can see in the rate equation, the order of each reactant is unknown. This will be worked out by the graph produced using the inverse of time recorded against the concentration of the reactant.

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