Chem vs. Phys Changes
Identify the following as a chemical or physical change: Crumpling up a piece of paper
What is physical change
What type of reaction involves adding two small molecules together to make one bigger molecule?
What is a synthesis reaction
What are reactants in a chemical reaction?
What is the stuff that goes into a chemical reaction
How many Carbon atoms are in the following: C7H9O2
seven
What is the difference between an anion and a cation
An anion is a negative ion, a cation is a positive ion
Which is usually just a phase change (evaporating, melting, consdensing)- Chemical change or physical change
What is physical change
Two types of reactions that can happen are single displacement and double displacement reactions. What does the word displacement mean?
What is to switch or replace
What are the products in a chemical reaction
What is the stuff that comes out of a chemical reaction
How many total atoms are in the following: HSO4
If an atom loses electrons, will it be a cation or an anion
If we were to separate water into each of its components, would this be a chemical or physical change?
What is a chemical change
What type of chemical reaction is this: AB-> A+B
What is a decomposition reaction
What is the difference between an element and a compound/molecule
An element is found on the periodic table, and a molecule is several elements bonded together
Two
If the symbol of a bromine ion is -2, how many electrons did it gain or lose
It gained 2 electrons
Name two chemical changes and two physical changes
Many answers would be correct.
What type of chemical reaction involves an acid (H) and a base (OH) as reactants, and water as a product?
What is a neutralization reaction
What does conservation of mass mean in chemical reactions
The weight of the reactants and the weight of the products is the same. No mass is lost during a chemical reaction
How many potassium (K) atoms are in the following: 2K2Br
Four
When do we put the -ide ending onto the names of ions?
When the ion is a nonmetal
Name two chemical properties and two physical properties
Many answers would be correct.
What is the following: C4H8+O2 --> H2O+CO2
What is a combustion reaction
What is a balanced reaction
A reaction that has the same number of each type of molecule on each side
How many oxygen atoms are in the following: 2K2(SO4)3
Twenty four
If aluminum ends up with a total of 10 electrons, is it a cation or anion, how many electrons are gained or lost, and what would be the number next to the symbol?
It is a cation. It lost 3 electrons. It's symbol would be 3+