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