View
213
Download
0
Category
Preview:
Citation preview
Bonding and Bonding and Chemical FormulasChemical Formulas
Bonding and Bonding and Chemical FormulasChemical Formulas
Chapter 23 ReviewChapter 23 Review
1. What are the reactants in a chemical
reaction?
2. A chemical reaction that gives off energy (usually
as heat and/or light) is which
type of reaction?
3. Name two signs of a chemical change.
4. A chemical reaction that absorbs (takes in) energy, usually getting
colder, is which type of reaction?
5. What are the products in a chemical
reaction?
Balance the following chemical equation.
• 6. Calcium oxide, CaO, reacts with sulfur dioxide to form calcium sulfite, CaSO3.
Balance the following chemical equation.
• 7. Methanol, CH3OH, breaks down (decomposes) into carbon monoxide and hydrogen gas, H2.
Balance the following chemical equation.
• 8. When heated, tantalum metal reacts with chlorine gas, Cl2, to form tantalum pentachloride, TaCl5.
Balance the following chemical equation.
• 9. Nitric acid, HNO3, reacts with hydrogen sulfide, H2S, to form nitrogen dioxide, water,
• and sulfur.
Balance the following chemical equation.
• 10. Aluminum sulfate, Al2(SO4)3, decomposes to yield aluminum oxide, Al2O3, and sulfur trioxide, SO3.
• Stop
1. What are the reactants in a chemical
reaction?
• Beginning materials
2. A chemical reaction that gives off energy (usually
as heat and/or light) is which
type of reaction?
Exothermic
3. Name two signs of a chemical change.
• Production of smoke• Production of gas• Change in color• Change in temperature
4. A chemical reaction that absorbs (takes in) energy, usually getting
colder, is which type of reaction?
• Endothermic
5. What are the products in a chemical
reaction?
• The ending materials
Balance the following chemical equation.
• 6. Calcium oxide, CaO, reacts with sulfur dioxide to form calcium sulfite, CaSO3.
Balance the following chemical equation.
• 7. Methanol, CH3OH, breaks down (decomposes) into carbon monoxide and hydrogen gas, H2.
Balance the following chemical equation.
• 8. When heated, tantalum metal reacts with chlorine gas, Cl2, to form tantalum pentachloride, TaCl5.
Balance the following chemical equation.
• 9. Nitric acid, HNO3, reacts with hydrogen sulfide, H2S, to form nitrogen dioxide, water,
• and sulfur.
Balance the following chemical equation.
• 10. Aluminum sulfate, Al2(SO4)3, decomposes to yield aluminum oxide, Al2O3, and sulfur trioxide, SO3.
Recommended