Chem 9.1 Balancing Chemical Equations and 9.2 Types of Chemical Reactions

Question 0

What does the coefficient say

Answer 0

Number of particles

Question 1

What are the 3 types of particles

Answer 1

Molecules (for a molecular compound)
Formula unit (for an ionic compound)
Atoms (for an element)

Question 2

What does the subscript say

Answer 2

How many atoms are in the particles

Question 3

of atoms in a coefficient =

Answer 3

Subscript•coefficient

Question 4

To balance equations what do you change

Answer 4

Coefficient

Question 5

What are the 5 types of chemical reactions

Answer 5

Synthesis 
Decomposition 
Single Replacement 
Double Replacement 
Combustion

Question 6

What are Synthesis reactions and what is the general form

Answer 6

Two or more simpler substances combine to make one larger product
Exothermic
A(element)+ B (element) –> AB(compound)

Question 7

What are decomposition reactions and what is the general form

Answer 7

One single reactant breaks into simpler substances 
Endothermic 
AB(compound) --> (heat) A(element) + B (element)

Question 8

What are single replacement reactions and what is the general form

Answer 8

Part of an ionic compound dissolved in water (aq) is removed and replaced by a new element
Either metal replaces metal, or halogen replaces halogen
A (s) + BC (aq) —> B (s {or l})+ AC (aq)

Question 9

What are double replacement reactions and what is the general form

Answer 9

Two ionic compounds dissolved in water switch partners

AX (aq, ionic compound) + BY (aq, ionic compound) –> AY + BX (2 ionic compounds)

Question 10

What are combustion reactions and what is the general form

Answer 10

A carbon containing compound reacts with oxygen to create carbon dioxide and water
CXHY (hydrocarbon) + O2 (g)–> CO2 (g) + H20 (g)

Question 11

Atoms do not change what during chemical reactions

Answer 11

Their charges