BYU Lesson 8

What is the substance formed during a chemical reaction?

product

The ________ make up the first half of a chemical equation.

reactants

2K + 2H2O → 2H2 + 2KOH

single displacement

CuO + H2 → Cu + H2O

single displacement

2Ag + S → Ag2S

synthesis

4K + O2 → 2K2O

synthesis

NbBr3 + Br2 → NbBr5

synthesis

How many oxygen atoms does this portion of a chemical equation have? 5C6H12O6

thirty

The chemical formula 3P4O10 is part of a balanced chemical equation. How many phosphorus atoms would there be on the other side of the equation?

twelve

How many hydrogen atoms does this portion of a chemical equation have? 2(NH4)3PO4

twenty-four

How do you show that a substance is dissolved in water as a solution when writing a chemical equation?

(aq)

How do you show that a substance in a chemical equation is a solid?

(s)

What is the number written in front of a compound in a chemical formula called?

coefficient

2C7H14 + 21O2 → 14CO2 + 14H2O

combustion

C4H8 + O2 → 4CO2 + 4H2O

combustion

Double-displacement Reactions

compound + compound → compound + compound AB + CD → AD + CB

Decomposition Reaction

compound = element or compound + element or compound C = A + B

2H2O2 → O2 + 2H2O

decomposition

HCl + NaOH → H2O + NaCl

double displacement

Pb(NO3)2 + Na2CrO4 → 2NaNO3 + PbCrO4

double displacement

Single-displacement Reations

element + compound = compound + element A + BC = AC + B

Synthesis Reaction

element or compound + element or compound = compound A + B = C

Combustion Reactions

element or compound + oxygen → oxide compound A + O2 → AO