University:
High School
Course:
High School Chemistry
Academic year:

2024
Views:

89

Pages:

1
Author:

spookeTor11

Chemical Reactions Study Guide LT 6.1: Explain the relationship between balancing chemical equations and the law of conservation of mass. I can model a chemical reaction to show conservation of mass. I can analyze experimental evidence and explain differences in initial and final mass using the Law of Conservation of Matter. I can balance simple chemical reactions. I can balance chemical reactions that contain polyatomic ions and combustion reactions. 1. What is the law of conservation of mass? What does it mean? Matter/mass is never created or destroyed. In chemical reactions, matter is just rearranged. 2. You burn a piece of paper in a completely sealed container. a. How would you expect the mass from the beginning to compare to the mass at the end? The mass of reactants and products should be equal. b. Describe what happens to the molecules in the flask. (Do the elements change? Do the bonds change?) The bonds in the reactants break, then atoms form new bonds to make the products. 3. a. Balance the following equation: b. Draw an atomic representation of this reaction: __2__ NaCl (s)  __2__ Na(s) + ___1__Cl2 (g) 4. a. Balance the following equation: b. Draw an atomic representation of this reaction: __1__ CS2 (g) + __3__ O2 (g)  __1__ CO2 (g) + __2__SO2 (g) 5. a. Balance the following equation: b. Draw an atomic representation of this reaction: __2__ KF (s) + __1__ H2O (l)  __2__ HF (aq) + __1__K2O (aq) 6. Balancing practice: a. ____1___ V2O5 + ____5___ CaS  ____5___ CaO + _____1__ V2S5 b. ____2___ NaNO3 + ___1____ PbO  _____1__ Pb(NO3)2 + __1_____ Na2O c. ___6____ AgI + ___1____ Fe2(CO3)3  ____2___ FeI3 + ____3___ Ag2CO3 d. ____1___ C2H4 +____3___ O2  ____2___ CO2 +___2____ H2O