Does the amount of hydrogen gas formed in the below reaction depend on the amount of magnesium used?

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Aim:

Does the amount of hydrogen gas formed in the below reaction depend on the amount of magnesium used?

Prediction:

I predict that as the amount of magnesium used increase, so will the amounts of hydrogen gas produced. I will use the collision theory to explain this.

The collision theory involves a chemical reaction taking place between particles when they collide. There are a variety of factors that affect how frequently particles collide, and how successful these collisions are in making a chemical reaction:

  • Concentration of acid: this is how many molecules are in the acid the higher the concentration the more molecules are in there. When there is a higher concentration the reaction will occur faster because there are more molecules to react with so the reaction takes place more frequently.
  • Type of acid: different kinds of acids are more or less reactive than others so if you use different types of acids you will get different results.
  • Surface area of magnesium: as the surface area increases it will also become more reactive because there will be a larger area for the acid to collide with.
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In this particular experiment, my altering factor will be the length of the magnesium strip; this will be measured in cm.

Diagram:

Plan:

Equipment:

  • 100ml measuring cylinder
  • Conical flask
  • 30cm magnesium ribbon
  • 100cm3 dilute sulphuric acid
  • Plastic tub

Method:

I will take my 30cm magnesium strip and divide it up into different lengths starting with 1cm, 2cm, 3cm, and 4cm. I will repeat this twice more using all of each length. One piece of each length was used in the preliminary investigation and the other two pieces of ...

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