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

To Investigate how changing the concentration Affects the Rate of Reaction between Hydrochloric Acid and Magnesium

Extracts from this document...


To Investigate how changing the concentration Affects the Rate of Reaction between Hydrochloric Acid and Magnesium Aim The aim of this experiment is to investigate how changing the concentration of hydrochloric acid will have on the rate of reaction between magnesium and hydrochloric acid. Background Information "What is 'rate of reaction'? The rate of a reaction is the speed of the reaction. It is not "how much" of a product is made, but instead "how quickly" a reaction takes place Chemistry for You There are five variables that affect the rate of reaction, and could be changed throughout the experiment. They are: * Concentration * Catalyst * Surface area * Temperature * Pressure * The size of the particles Concentration Concentration will only be discussed because the investigation is solely investigating the concentration of hydrochloric acid and magnesium. The other factors are not going to be investigated, and therefore do not need to be looked into with detail. As concentration is the main factor, I will go into further detail about it. The concentration of a solution is how strong the solution is. In a less concentrated acid, the number of collisions is low, so the rate of the reaction is slower. This is because the less concentrated an acid is, the more neutralised it becomes. Bonds are being shared which means that the covalent bonds have less ions to share. ...read more.


* Make sure that excess acid is not used. Method * Collect the apparatus: o Magnesium strips o Hydrochloric acid (2M) o Ruler o Pipette o 250ml Beaker o Paper Towels o Distilled Water o 100ml Measuring Cylinder o Stopwatch * Measure HCL in measuring cylinder. Start with 10ml of it. * Add 90ml of distilled water, so it makes the solution 100ml * Pour it into a 150ml beaker * Cut many magnesium strips to measuring at 2cm, so they are equal size. * Label the beakers 0M, 0.4M, 0.8M , 1.2M , 1.6M , 2M * Drop the magnesium strip into the 150ml beaker vertically. * Start the stopwatch as soon as the magnesium hits the hydrochloric acid * Stop timer when the reaction finishes. * Record timed results. * Rinse out the beaker and dry it with paper towels. * Repeat the experiment but use 20ml of HCl and 80ml of distilled water. Preliminary experiment Before conducting an experiment an initial concentration table was made. The concentration table as shown below shows how much of HCl and water was needed. The initial plan of the investigation was to use 100ml of solution; however the total volume of the solution has been changed to 50ml. This has been changed as when the preliminary test was carried out, 10ml of HCl and 90ml of distilled water took too long. ...read more.


This therefore meant that the measuring cylinder was not perfectly clean, which means that it would have left residue from the previous experiment. This would have affected the results in such a way that it might not have been too concentrated. However, this is only an observation as I cannot comment on this error affecting the entire set of results. A way to avoid this could have been to use new measuring cylinders or to rinse out the measuring cylinders. The con in this is that there isn't a lot of equipment to be wasted, and in addition rinsing the measuring cylinder would have made it less concentrated. These faults could explain the anomalous results I had. The results were only slightly anomalous, and in this experiment could be used as the investigation does not need to go into thorough detail, and the results helped justify the prediction and conclusion. To improve the investigation, accurate measuring cylinders would be used, and an accurate method of measuring the time taken to react would be found. A greater range of readings could be recorded and put into a graph. Another thought of furthering the investigation could be to investigate other variables/factors, such as varying the temperature, or increasing the surface area of the magnesium ribbon. To determine the reliability of the results, other ways of editing the investigation could be considered. They could be to stir the beaker with a glass rod - this helps initiate the reaction. ?? ?? ?? ?? 1 Tej Soor ...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. Marked by a teacher

    The aim of this investigation is to investigate the rate of reaction of magnesium ...

    A 100cm3 gas syringe should be appropriately accurate for measuring the gas produced since it is accurate to 1cm3 of gas. I will use a three figure balance to measure the mass of magnesium to be used since it is vital that as close to 0.1g of magnesium is used as possible.

  2. How Concentration affects the rate of reaction.

    of different concentrations Funnel 5cm� Hydrochloric acid (HCl) Plastic wallet Water Stopclock Paper marked with permanent ink cross 2 Measuring cylinders Conical Flask * Results The hydrochloric acid had been poured into the conical flask containing the sodium thiosulphate and the stop clock immediately started. I observed the solution from directly above the conical flask to judge the time in the best way.

  1. How does changing the concentration of the Hydrochloric acid affect it reactions with Magnesium?

    Volume of Hydrogen gas (cm3) Average volume of Hydrogen gas (cm3) Test 1 Test 2 20 secs 40 cm3 40 cm3 40 cm3 40 secs 20.4 cm3 17.5 cm3 18.95 cm3 60 secs 3.3 cm3 1.2 cm3 2.25 cm3 The following solutions were measured every 10 secs: Solution 3 Time (sec)

  2. Experiment to investigate how changing the concentration of hydrochloric acid affects the rate of ...

    Grounded Marble chips 4 Decisions I am looking for a reactant with a rate of reaction of 4 because it would be neither too fast nor too slow. However, I also have to keep in mind that I would need as much control over the experiment as possible.

  1. Investigating the Rate of Reaction Between Hydrochloric Acid (Hcl) and Magnesium (Mg).

    * Clamp stand: to hold the gas syringe in a constant position, therefore stopping any errors in the reading of it. The apparatus should be set up as shown on the other side of the paper. SAFETY AND FAIR TESTING Because of the nature of this experiment safety precautions must be taken.

  2. How does changing the concentration of hydrochloric acid affect its rate of reaction with ...

    The preliminary study has also helped me familiarize myself with the method that I could be using for the main experiment. I did the experiment using five different concentrations of hydrochloric acid, which were as follows: Hydrochloric acid (cm�) Distilled water (cm�)

  1. An Investigation into the factors affecting the rate of reaction between magnesium and hydrochloric ...

    Note: They have been attached all overlaid their appropriate graph but should be viewed one at a time overlaid the appropriate graph. A tangent was drawn at the beginning of each curve and its gradient calculated, the gradients are shown in the table below.

  2. Investigating the affect of concentration on the rate of reaction between magnesium and hydrochloric ...

    the activation energy and therefore more collisions will bring about a reaction. This affect of the increase in temperature on the number of molecules with energy equal to or greater than the activation energy is shown below. A catalyst is a substance which alters the rate of a reaction without itself being used up or changed chemically during the reaction.

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