Types of reactions

• Combustion: Combustion is the formation of CO2 and H2O from the reaction of a chemical and O2
• Combination (synthesis): Combination is the addition of 2 or more simple reactants to form a complex product.
• Decomposition: Decomposition is when complex reactants are broken down into simpler products.
• Single Displacement: Single displacement is when an element from on reactant switches with an element of the other to form two new reactants.
• Double Displacement: Double displacement is when two elements from on reactants switched with two elements of the other to form two new reactants.
• Acid-Base: Acid- base reactions are when two reactants form salts and water.

Definition of Stoichiometery

Stoichiometry is a section of chemistry that involves using relationships between reactants and/or products in a chemical reaction to determine desired quantitative data. In Greek, stoikhein means element and metron means measure, so stoichiometry literally translated means the measure of elements.

Double replacement

In a double replacement reaction, the anions and cations of two compounds switch places and form two entirely different compounds.^[18] These reactions are in the general form:^[19]

For example, when barium chloride (BaCl₂) and magnesium sulfate (MgSO₄) react, the SO₄²⁻ anion switches places with the 2Cl⁻ anion, giving the compounds BaSO₄ and MgCl₂.

Another example of a double displacement reaction is the reaction of lead(II) nitrate with potassium iodide to form lead(II) iodide and potassium nitrate:

Decomposion

A decomposition reaction is when a more complex substance breaks down into its more simple parts. It is thus the opposite of a synthesis reaction, and can be written as.

One example of a decomposition reaction is the electrolysis of water to make oxygen and hydrogen gas:

more on chemical reactions

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes may occur.

beginning chemical reactions

The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants.

converting representative particals

We must convert representative partials by using Avogadro's number 6.02x10(23).

Representative partials to moles: 1 mole
                                                       6.02x10(23)

moles to representative partials: 6.02x10(23)
                                                       1 mole

Converting mass to moles

Today we learned about converting mass to moles. This is done through a convertion formula.

to convert moles to mass: atomic mass (g)
                                          1 mole

to convert mass to moles: 1 mole
                                          atomic mass

atomic mass is found on the periodic table

Stoichiometry lesson packet

Today we learned about Stoichiometry. It was very much like past lessons and was easy to grasp. It was cool to see all of our past lessons come together like that. 

Stoichiometry

Today we took the Stoichiometry test. I knew the material. But I kept getting some wrong answers for some of the problems. I was confused because I was doing all the problems right. So it was most likely my nomenclature that was getting in the way.