How the Concentration of an Acid Affects the Rate of Reaction
Prediction
==========
For a reaction to take place there must be enough energy for the
particles to collide & react. So as the concentration increases so
will the rate of reaction because there are more acid particles in the
solution for the magnesium to collide & react with. Therefore I think
the rate of reaction will speed up as the concentration gets higher,
for instance 1M will react twice as fast as 0.5m.
Plan
====
I will set up the apparatus as shown in the diagram below. I will be
reacting magnesium with sulphuric acid to test if the concentration of
an acid affects the reaction time. I will use molars between 0M & 1M
for my initial trial run. I will measure the rate of reaction using a
conical cylinder with a rubber bung & a gas syringe. I will then time
how long it takes to fill up to 100cc of gas. I will repeat each
concentration 3 times then take a average so I get more accurate
results, I will repeat any anomaly's I get so I will get my final
results as accurate as possible. I will use five different
concentrations so I can gather a good range of data.
Fair test
=========
I will have only one variable so I can relate all changes in the
experiment to that one thing - in this test I am changing the
concentration of the acid. However I must also monitor several other
things that could alter my results.
· Surface area- this would speed up the reaction rate by increasing
the chance of a collision if the size is made bigger or decrease the
chance if the size is made smaller. So I will use the same magnesium
ribbon through out the experiment.
· Temperature - if the temperature is increased the amount of
collisions will be higher & more violent because the higher the
temperature the more energy the particles have.
CL-, as the ions of H+ and OH- react to form H2O. These spectator ions
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To start with I am going to draw a picture of my set design so i can
Investigating How the Concentration of Hydrochloric Acid Affects the Rate of Reaction with Calcium Carbonate
the acid was at 14 C the magnesium took 141 seconds to react and 27 C
I did not really know what to do for the diagram, and will admit that I had
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= = = == I predict that as the concentration of the hydrochloric acid decreases the rate of reaction will decrease and therefore the time taken for 75ml of gas to be released will increase.
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The Effect of Concentration of Hydrochloric Acid on the Rate of Reaction with Magnesium Aim: To investigate the effect of concentration of hydrochloric acid on the rate of reaction with magnesium Prediction: As the concentration of the hydrochloric acid increases, so will the rate of reaction Hypothesis: In a reaction, particles of two different reactants react together to form a product. The reaction only takes place on account of two things, if the particles collide, and if the collision has enough 'activation energy'. The two reactant particles, in this case magnesium particles and hydrochloric acid particles, must collide with each other on the correct 'collision course'. If this does not occur then no chemical reaction will take place. The reaction must also have enough energy, this can be affected by temperature, the more heat the particles have the faster they move and so the more energy therefore more chance of successful collisions.
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