Experiment 3: Chemical Reactions General Chemistry I and II Lab Manual Dakota State University Page 62 of 232 If the splint… The gas is likely to be… Goes out completely Carbon dioxide or nitrogen Re-ignites or glows brighter oxygen Explodes (in the form of a loud “pop”) hydrogen In writing a chemical reaction, it is important to remember the law of conservation of matter; one cannot create or destroy matter, but it can change form. From Dalton’s Law, we know that we cannot change the subscripts of the chemicals, because that would change what the chemical is. What we can change is the numbers in front of the chemicals in a chemical reaction (the “stoichiometric coefficients); these can be used to balance a chemical reaction (the same number of each type of atom on each side of the reaction). An unbalanced chemical equation: C 8 H 18 (l) + O 2 (g) CO 2 (g) + H 2 O (g) C: 8 on reactant side, 1 on product side H: 18 on reactant side; 2 on product side O: 2 on reactant side; 3 on product side (notice it is in both compounds on the product side)
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This note was uploaded on 01/27/2012 for the course CHM 2045 taught by Professor Josephwalter during the Fall '11 term at Dakota State.