Modern Chemistry: Student Edition 2006 1st Edition solutions

Modern Chemistry: Student Edition 2006 1
What is a chemical reaction?

Modern Chemistry: Student Edition 2006 1
What is the only way to prove that a chemical reaction has occurred?

Modern Chemistry: Student Edition 2006 1
When water boils on the stove, does a chemical change or a physical change take place?

Modern Chemistry: Student Edition 2006 1
Give four examples of evidence that suggests that a chemical change probably is occurring.

Modern Chemistry: Student Edition 2006 1
When propane gas, C3H8, is burned with oxygen, the products are carbon dioxide and water. Write an unbalanced formula equation for the reaction.

Modern Chemistry: Student Edition 2006 1
Assume that liquid water forms in item 5. Write a formula equation for the reaction that shows the physical states of all compounds.

Modern Chemistry: Student Edition 2006 1
What does Mn above the arrow in a formula equation mean?

Modern Chemistry: Student Edition 2006 1
What symbol is used in a chemical equation to indicate produces or yields?

Modern Chemistry: Student Edition 2006 1
Solid silicon and solid magnesium chloride form when silicon tetrachloride gas reacts with magnesium metal. Write a word equation and an unbalanced formula equation. Include all of the appropriate notations.

Modern Chemistry: Student Edition 2006 1
Magnesium oxide forms from magnesium metal and oxygen gas. Write a word equation and an unbalanced formula equation. Include all of the appropriate notations.

Modern Chemistry: Student Edition 2006 1
Describe evidence that burning gasoline in an engine is a chemical reaction.

Modern Chemistry: Student Edition 2006 1
Describe evidence that chemical reactions take place during a fireworks display.

Modern Chemistry: Student Edition 2006 1
The directions on a package of an epoxy glue say to mix small amounts of liquid from two separate tubes. Either liquid alone does not work as a glue. Should the liquids be considered reactants? Explain your answer.

Modern Chemistry: Student Edition 2006 1
When sulfur is heated until it melts and then is allowed to cool, beautiful yellow crystals form. How can you prove that this change is physical?

Modern Chemistry: Student Edition 2006 1
Besides the reactant, what is needed for the electrolysis experiment that breaks down water?

Modern Chemistry: Student Edition 2006 1
Write the word equation for the electrolysis of water, and indicate the physical states and condition(s) of the reaction.

Modern Chemistry: Student Edition 2006 1
For each of the following equations, write a sentence that describes the reaction, including the physical states and reaction conditions. a. Zn(s) + 2HCl(aq) ZnCl2(aq) + H2(g) b. CaCl2(aq) + Na2CO3(aq) CaCO3(s) + 2NaCl(aq) c. NaOH(aq) + HCl(aq) NaCl(aq) + H2O(l) d. CaCO3(s) CaO(s) + CO2(g)