2 What Part of the Atom Is Affected by Chemical Reaction? Electrons are the negatively charged. This particle is about 1,000 times smaller than the mass of a proton. It is impossible to see where they are at a specific moment due to the speed it moves at. Their chemical bond is Electrovalent, or Ionic. They are the only part in the atom affected by chemical reaction.lectron.html
3 What is happening during a chemical Rx? During a chemical reaction bonds between atoms or molecules are either being broken or formed. For example vinegar and baking soda creates this chemical reaction The acid in the weak 5% substance (vinegar) reacts with the pure substance (baking soda)Laws of Conservation – Matter can not becreated or destroyed. That total mass of products before and after reaction is the same.Signs of Chemical Reaction – bubbling, fizzing, temperature change, color change, catches on fire, etc.Reactants – are the materials that is used for the chemical reactionProducts – is the substance(s) made afterwards123/change/reactant.htm
4 Explain the role of energy in chemical reactions. Chemical potential energy is energy that is stored in the bonds of molecules or atom. This energy holds these particles together.Examples: Biomass, Petroleum, Natural gas, and Propane. Activation energy is the energy that is needed to create a chemical reactionExothermic – reaction gets hot Endothermic- reactions get coldEXOTHERMIC EXAMPLEGasoline +Fire =EXPLOSION
5 ENDOTHERMIC EXAMPLE Baking soda + Firecommons/thumb/c/c1/Streichholz.jpg/250px-Streichholz.jpg=EXTINGUISHED out.jpg
6 Types of Chemical Rx’sExplain what happens in the different types of reactionsSynthesis – is the combination of 2 0r more pre-existing elements. Creating something new.Decomposition – is when a chemical compound is separated into a smaller compound or element Combustion – or burning is a exothermic reaction produces heat. Can be a flame or just a glowSingle Replacement – takes one element with a chemical which results to another element being created. For example putting aluminum in copper chloride creates copper Double Replacement - when a positive ion or Cation combines with a negative ion or anion. For example barium chloride and sodium sulfate creates a white powder.