* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Chemical Reactions - Mr. Brown`s Science Town
Drug discovery wikipedia , lookup
Gas chromatography wikipedia , lookup
Hydrogen-bond catalysis wikipedia , lookup
Acid–base reaction wikipedia , lookup
Determination of equilibrium constants wikipedia , lookup
Water splitting wikipedia , lookup
Process chemistry wikipedia , lookup
California Green Chemistry Initiative wikipedia , lookup
Chemical plant wikipedia , lookup
Chemical weapon proliferation wikipedia , lookup
Physical organic chemistry wikipedia , lookup
Al-Shifa pharmaceutical factory wikipedia , lookup
IUPAC nomenclature of inorganic chemistry 2005 wikipedia , lookup
Chemical potential wikipedia , lookup
Electrolysis of water wikipedia , lookup
Safety data sheet wikipedia , lookup
History of chemistry wikipedia , lookup
Chemical weapon wikipedia , lookup
Freshwater environmental quality parameters wikipedia , lookup
Fluorochemical industry wikipedia , lookup
Click chemistry wikipedia , lookup
Chemical industry wikipedia , lookup
Bioorthogonal chemistry wikipedia , lookup
Chemical Corps wikipedia , lookup
Chemical equilibrium wikipedia , lookup
Lewis acid catalysis wikipedia , lookup
Rate equation wikipedia , lookup
Electrochemistry wikipedia , lookup
Registration, Evaluation, Authorisation and Restriction of Chemicals wikipedia , lookup
Metalloprotein wikipedia , lookup
Transition state theory wikipedia , lookup
Evolution of metal ions in biological systems wikipedia , lookup
Chemical reaction wikipedia , lookup
VX (nerve agent) wikipedia , lookup
An Intro. To Chemical Reactions What is a chemical reaction? How do we represent chemical reactions? Chemical Reactions Chemical Reaction: the change of one or more substances by the breaking of bonds in the reactants and the formation of new bonds to form products; new substances formed. Reactants: substances undergoing reaction Products: New substances formed Catalyst: a substance that speeds up the rate of a reaction but is not used up in reaction; shown on arrow Evidence of a Chemical Reaction Production of a gas/bubbles A solid (precipitate) forms Color changes Energy is released (light, flames, heat, etc.) or absorbed An Example of a Chemical Reaction Photosynthesis: Word Equation: Carbon dioxide gas + liquid water with sunlight produces oxygen gas + solid glucose An Example of a Chemical Reaction cont’ Skeleton Equation: CO2(g) + H2O(l) O2(g) + C6H12O6(s) Balanced Chemical Equation 6CO2(g) + 6H2O(l) 6O2(g) + C6H12O6(s) Guidelines to Writing Skeleton Equations: 1. From the problem, write a word equation. Determine which substances are reactants and products and where the (“yields”) symbol should be placed. b. Include states of matter for all substances. Example: Making Rust A piece of solid iron is combined with oxygen gas to form solid iron (III) oxide. Solid iron + oxygen gas solid iron (III) oxide a. Guidelines to Writing Skeleton Equations: 2. Write the chemical formula for all reactants and products – 5 Situations Single Elements – write the symbol for element w/o a subscript. Example: Aluminum metal Al(s) b. Diatomic Element (7) - Write symbol for element w/ a subscript of 2; Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine and Iodine Example: Chlorine gas Cl2(g) a. Guidelines to Writing Skeleton Equations: c. Ionic Compound – Use crisscross method w/ ionic charges. - No prefixes in name, contains a metal, polyatomic ion or roman numeral Example: Chromium (III) sulfite Cr+3SO3-2 = Cr2(SO3)3 d. Molecular Compounds – Prefixes = Subscripts - They will have prefixes in name and contain all nonmetals. Example: Disulfur trioxide S2O3 Guidelines to Writing Skeleton Equations: e. Common Names: Look up formula in textbook or other resource Examples: Hydrochloric acid – HCl(aq) Methane gas – CH4(g) Guidelines to Writing Skeleton Equations: 3. Add abbreviations for state of each substance after its formula. (s) = solid (l) = liquid (g) = gas (aq) = aqueous solution (a solid dissolved in water) Examples… Write the chemical equation for the following word equation: Solid silver sulfide reacts with aluminum metal to produce solid aluminum sulfide and silver metal Examples… Write the chemical equation for the following word equation: Aqueous zinc hydroxide combined with phosphoric acid forms solid zinc phosphate and liquid water