Chemical Reactions and Addition Reactions

These flashcards cover the fundamental principles of chemical equation balancing and detailed examples of addition reactions as described in the lecture notes.

Balancing a Chemical Equation

The process of ensuring that the total number of atoms of each element (such as $H$ and $O$) before a reaction equals the total number of atoms in the product after the reaction.

Addition Reaction

A type of chemical change where more than one substance collects together to form a completely different new chemical substance.

Ferrous Sulfide ($FeS$)

A dark gray substance formed when Iron ($Fe$) and Sulfur ($S$) react together under heat, exhibiting properties different from its constituent elements.

Chemical equation for creating Ferrous Sulfide

$$Fe + S \rightarrow FeS$$

Zinc Sulfide ($ZnS$)

The product of an addition reaction between Zinc ($Zn$) and Sulfur ($S$).

Chemical equation for creating Zinc Sulfide

$$Zn + S \rightarrow ZnS$$

Proportions for Iron and Sulfur experiment

Typically involves measuring $7\,g$ of Iron powder and $4\,g$ of Sulfur to be mixed and heated.

Balancing equation for Water formation

$$2H_2 + O_2 \rightarrow 2H_2O$$