biochemistry

• List the 4 types of reactions.

  Composition, decomposition, single displacement and double displacement
• A composition reaction is when two or more reactants form to create a single product.
• N2 (g) + 3H2 (g) → 2NH3 (g) is an example of a composition reaction
• A decomposition reaction is when a single reactant breaks down to form two or more products
• In single displacement one element replaces another element in a compound
• A double displacement reaction, involves the exchange of ions between two compounds to form two new compounds
• Precipitation reactions generate solid products that settle out of solution.
• In chemical equations, precipitates are always shown as solid (s)
• a precipitate must be insoluble
• soluble means to be able to dissolve easily
• Insoluble means to not be able to dissolve easily.
• If a product is insoluble then it will form a precipitate.
• Particles move faster at higher temperatures than they do at lower temperatures.
• As the temperature increases, particles gain energy and move more quickly.
• higher temperature causes frequency of collisions to increase
• higher temperature causes particles to collide with greater energy
• Collision theory states that reactant particles need to collide in order to react
• increasing surface area causes frequency of successful collisions to increase
• higher the surface area, faster the reaction
• solvent is a substance that another substance dissolves in
• The concentration of a solution is the amount of solute in a particular volume of the solution
• A solution that has a few solute particles spread out in a solvent is dilute
• A solution that has many solute particles close together is concentrated