chapter 3

Question 1

Conservation of Mass Law?

Answer 1

In a chemical reaction, mass is never lost or destroyed

Question 1

What is a chemical reaction?

Answer 1

a rearrangement of atoms that results in a formation of one or more new compounds.

Question 2

When balancing combustion equations what is the order to follow?

Answer 2

C, H and then O

Question 3

Types of chemical reactions ( basic)

Answer 3

Synthesis / combination
SIngle displacement
double displacement
combustion
de-combustion

Question 4

Types of chemical reactions (specific)

Answer 4

Acid-base (neutralization)
Gas-forming
Precipitation
Redox (oxidation-reduction)

Question 5

What is an Acid-base reaction

Answer 5

A reaction between an acid (H) and a base (OH) that produces (=) salt (?) and water (H20)

Question 6

What is a Gas-forming reaction

Answer 6

At least one of the products is a gas
( periodic table period 8)

Question 7

what is a Precipitation reaction

Answer 7

One of the products is insoluble or a solid (precipitate)

Question 8

what is a Redox reaction

Answer 8

Transfer of electrons from one reactant to another

Question 9

what is formula weight (FW),

Answer 9

sum of the atomic weights (AW) of the atoms in the chemical formula of the substance.