Throughout our unit 4 in Chemistry, we learned about reactions and stoichiometry. In this unit we went over, types of reaction, did some labs and did a few calculation on the reaction rate.
There are five types of reaction:
- Synthesis – Two substances react to form a single product.
- x+y → xy
- Decomposition – A single reactant decomposes or breaks down into two or more products
- A → B + C
- Combustion – One reactant (fuel) combines with oxygen to produce an oxide and water.
- Fuel + O2 → oxide + H2O
- Single Replacement – One, more reactive element, replaces another.
- M + AX →MX + A
- Double Replacement – A reaction in which the cations and anions of both reactants switch partners.
- AX + DZ → AZ + DX
Those are the five types of reaction that can happen to the molecule when they are reacting. We also went over the reaction rate. A few words that I want to tell are activation energy, activated complex, reactant, and product.
Activation energy (Ea) is the minimum amount of energy to start a reaction.
Activated complex is a reaction progresses from reactants to products, it goes through a transition state.
The reactant is a substance in reaction before becoming the product.
A product is as the reaction occurs products is produced.
Reactants → Products
- Start with a concentration of reactants (reagents) which decrease over time.
- The reaction occurs quickly at the beginning and then slows down.
There are four(4) major factors in looking at the effect in the reaction rate:
- Concentration- As the concentration of reactants increases, there are more particles, so more collisions, and the rate will increase.
- Temperature – As temperature increases, the particles move faster, so more collisions occur, and the rate increases.
- Surface Area- Reactions take place on the surface of the solid, so as of surface area increase, reaction rate increases. *Notice they are a direct relationship
- Catalyst- a substance that speeds up a reaction without being consumed
Through this unit, I had understood the difference between reaction rate and reaction time. As well as understanding deeper into looking at the reaction progress of the molecule. This lesson really interests me as a student who doesn’t really interest in Chemistry and I think it is really fun to learn something like this topic.