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

To investigate the effect of concentration on the rate of a reaction - Magnesium + Hydrochloric Acid ---> Magnesium Chloride + Hydrogen.

Extracts from this document...


To investigate the effect of concentration on the rate of a reaction Magnesium + Hydrochloric Acid ---> Magnesium Chloride + Hydrogen Mg(s) + 2HCl(l) ---> MgCl2(l) + H2(g) Aim The aim of this investigation is to find out how the concentration of Hydrochloric Acid effects the rate of the reaction. In this case we will measure the rate at which Hydrogen is produced. The concentration of the Hydrochloric Acid will be our variable. Prediction I believe that the higher the concentration, the faster the rate of reaction. From preliminary experiments I have discovered that the higher the concentration of the acid, the more collisions there are. Therefore, the rate of reaction will be larger if we use a high concentration of the acid rather than using a smaller concentration. Procedure Experiment Acid Volume (cm3) Water Volume (cm3) Total Volume (cm3) Concentration (mol/dm3) 1 50 0 50 1m 2 40 10 50 0.8m 3 30 20 50 0.6m 4 20 30 50 0.4m 5 10 40 50 0.2m For the experiment we have chosen specific equipment. The equipment we have chosen was used in our preliminary experiment as was the magnesium. ...read more.


Reading 1 Reading 2 Reading 3 Average of Readings 0 0 0 0 20 3 2 2.5 40 4 3 3.5 60 4 4 4 80 4 4 4 100 5 4 4.5 120 6 6 6 Key Variables There are 4 main variables that will effect our experiment, these variables are: * Volume * Concentration * Surface Area * Temperature These variables are kept under control in our experiment. * Volume is kept at a constant of 50cm�. * Concentration will vary. See table on first page (it will go from 1m to 0.2m). * Surface area of the Magnesium is kept constant by making sure that we prepare the magnesium the same for each experiment (coiling it up) and we will use magnesium ribbon only. * Temperature will be kept roughly the same(room temperature). To improve our experiment we could use a water bath to keep temperature the same. The same amount of heat will be produced in this experiment as our preliminary experiment but there is much less effect as we have used 30cm3 more of the solution. Hotter the atoms, the more they vibrate, they more they collide, this could therefore effect the rate on certain experiments if the temperature is not kept constant. ...read more.


* Sources of error in the procedure could have been due to: 1. Varying length of magnesium (human error) 2. The concentrations were slightly off due to bad measurements with the pipette. 3. The balance is accurate to 0.01g so it is unlikely that this will have caused any noticeable errors. * The sources of error are due to apparatus used and human error. Using more accurate equipment (scales which measure the magnesium to a greater accuracy) and taking more care when preparing the experiment could reduce these anomalies. * By altering our method and using more accurate methods of cutting up the magnesium, and rolling up the magnesium carefully so that the surface area exposed is the same we could have more reliable results. * The data is very trustworthy due to the fact that we took two readings. The likely hood of error decreases as we take more readings. The average of the readings that matched closest was taken to ensure that our results were even more precise. * Our preliminary experiment data and graph also backs up our results. * My prediction "I believe that the higher the concentration, the faster the rate of reaction" was correct and has proven successful. To investigate the effect of concentration on the rate of a reaction Jonathan Middleton, 11B Page 1 5/2/2007 ...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 Effect of Concentration on the Rate of Reaction between Magnesium [Mg] and Hydrochloric ...

    4 star(s)

    Delivery tube The delivery tube is used when the gas is getting exported from the conical flask to the to the measuring cylinder submerged in the water so you are able to capture the gas and measure how much gas the reaction has given of.

  2. Marked by a teacher

    Investigation of the rate of reaction between Magnesium and Hydrochloric acid

    4 star(s)

    stopwatch would make those readings more reliable as I would know exactly when to record and what to record for my results table This is a list of the factors that may affect my results, and how they would affect them.

  1. Marked by a teacher

    For my experiment I am finding out the effects on the reaction rate when ...

    3 star(s)

    with hydrogen. A burette was used instead of a measuring cylinder because a burette can measure much more accurately than a measuring cylinder. > Funnel- It is hard to get the water from a tap into the burette without a funnel.

  2. Marked by a teacher

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

    The procedure for the experiment is as follows; * Using a measuring cylinder, measure 10cm3 of water and pour it into the side arm tube. * Measure 10cm3 of hydrochloric acid (1 mol/ dm3) and add it to the water.

  1. To investigate the effect of the concentration of nitric acid on the rate of ...

    It will be fastest at 2.0 molar and slowest at 1.4 molar. This is because as the concentration of a reactant (in this case the acid) is increased, there will be more reactant particles available and, therefore, more likelihood of effective collisions (i.e.

  2. Finding the effect of concentration on the rate of reaction of magnesium ribbon with ...

    Therefore the order of reaction was: 2 moles being fastest followed by 1.5 moles, than 1 mole and the slowest being 0.5 moles. In all experiments for the same mole, the rate at which the graphs gradient increased can be seen to be the same.

  1. Rate of reaction of hydrochloric acid and mangesium ribbon.

    Scientific Knowledge "When a chemical reaction occurs, the particles which combine need to meet up with each other (collide) so that they can swap or share electrons. If you want to speed up a reaction, you need to get these particles to hit each other more frequently." (www.revise.it) ? ?

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

    The energy level is steady as the magnesium has not been inserted yet. Then we see the energy level dramatically increase (B). This is the activation energy, and the energy needed to break the bonds of the hydrochloric acid particles.

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