Reactants in Chemical Reactions
Key Points about Reactants
- Definition: Reactants are the starting materials in a chemical reaction that undergo a transformation to form products.
- Role: They are essential for initiating a chemical reaction and determining the products that will be formed.
- Examples: Common examples of reactants include elements, compounds, and ions.
- Stoichiometry: The amounts of reactants in a chemical reaction are determined by the stoichiometry of the reaction, which is based on the balanced chemical equation.
Study Guide for Reactants
1. Identification of Reactants
- Chemical Equations: Learn to identify reactants in a chemical equation. They are typically listed on the left side of the arrow.
- Common Examples: Practice identifying reactants in common chemical reactions, such as the combustion of hydrocarbons or the reaction of acids with bases.
2. Role of Reactants
- Transformation: Understand how reactants are transformed into products during a chemical reaction.
- Limiting Reactant: Learn about the concept of limiting reactants, which determines the extent of a reaction and the amount of product formed.
3. Stoichiometry of Reactants
- Molar Ratios: Understand how to use the coefficients in a balanced chemical equation to determine the molar ratios of reactants.
- Calculations: Practice solving stoichiometry problems involving reactants, such as determining the amount of a reactant needed for a given reaction.
4. Reactant Concentrations
- Effect on Reaction Rate: Explore how the concentration of reactants influences the rate of a chemical reaction.
- Collision Theory: Understand the collision theory and how it relates to reactant concentrations and reaction rates.
[Reactants] Related Worksheets and Study Guides:
.◂Chemistry Worksheets and Study Guides High School. Elements - Set I
Worksheet/Answer key
Elements - Set I 
Worksheet/Answer key
Elements - Set I Worksheet/Answer key
Elements - Set I
Worksheet/Answer keyWorksheet/Answer keyThe resources above cover the following skills:
PHYSICAL SCIENCE (NGSS)
Matter and Its Interactions
Students who demonstrate understanding can:
Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms.
Plan and conduct an investigation to gather evidence to compare the structure of substances at the bulk scale to infer the strength of electrical forces between particles.