CHEMICAL INTERACTIONS. Chapter 1 - Chemical Reactions Outline/Review. 1.1 Matter and Its Changes. CHEMISTRY is the study of the properties of matter and how matter changes. An ELEMENT is a substance that cannot be broken down into any other substances by chemical or physical means.
Chapter 1 - Chemical Reactions
A COMPOUND is a substance made of two or more elements chemically combined in a specific ratio.
The materials you have at the beginning of a reaction are the REACTANTS.
H2 + O2 -----> H2O2
(H2 and O2 are the reactants while H2O2 is the product.)
The amount of matter in a chemical reaction does not change, so the total mass of the reactants must equal the total mass of the products.
2 Mg + O2 -----> 2 MgO
A SYNTHESIS reaction occurs when two or more substances combine to make a more complex compound.
2 SO2 + O2 + 2 H2O -----> 2 H2SO4
2 H2O2 -----> 2 H2O + O2
A REPLACEMENT reaction is when one element replaces another in a compound OR when two elements trade places.
2 CuO + C -----> 2 Cu + CO2
MgCl2 + K2S -----> MgS + 2 KCl
The rate of a reaction isaffected by such factors as concentration, surface area, and temperature.
Some of the most common sources of fires are small heaters, kitchen fires, faulty electrical wiring, and carelessness with cigarettes (the most deadly).
This concludes the Chapter 1 review for the Chemical Interactions book.