Signs of Chemical Reactions
This sign of a chemical reaction occurs when bubbles form.
Production of Gas
The small number in H₂O that tells the number of atoms is called this.
Subscript
A + BC → AC + B is the general formula for this reaction type.
single replacement reaction
Acids donate this particle.
H⁺ (a proton)
What do you call the starting molecule/element and new substance
Reactants and Products
When two clear liquids mix and turn orange, this has occurred.
Color Change
In the equation 2H₂ + O₂ → 2H₂O, the number 2 in front of H₂ is called this.
Coefficient
Two ionic compounds swap ions to form two new compounds.
double replacement reaction
Bases contain this ion.
OH⁻ (hydroxide)
Simple Decomposition, Decomposition of Carbonates and Decomposition of Hydroxides
The formation of a solid when two liquids are mixed is called this.
Precipitate
This process involves adjusting the stoichiometric coefficients—the numbers in front of molecules—to ensure the number of atoms for each element is equal on both sides, satisfying the law of conservation of mass.
Trial and Error Method or Balancing by Inspection
2 or more reactants form one product.
synthesis reaction
Acid + Base → ______ + ______
Salt and Water
What are the three essentials elements for a fire to occur?
Fuel,Heat, Oxygen,
Fireworks producing heat and light is an example of this sign of chemical change.
Production of heat/light
Balance this equation:
__ Na + __ Cl₂ → __ NaCl
2 Na + 1 Cl₂ → 2 NaCl
One compound breaks down into two or more products.
decomposition reaction
The pH of a neutral solution is this number.
pH 7
Ions not involved in the formation of the precipitate.
Spectator Ions
State the Law of Conservation of Mass (or Matter)
Matter is not created or destroyed during a reaction.
Balance this combustion reaction:
C₂H₄ + O₂ → CO₂ + H₂O
1 C₂H₄ + 3 O₂ → 2 CO₂ + 2 H₂O
A hydrocarbon reacting with oxygen to produce CO₂ and H₂O is called this.
combustion reaction
Balance this neutralization reaction:
HCl + Al(OH)₃ → AlCl₃ + H₂O
3 HCl + 1 Al(OH)₃ → 1 AlCl₃ + 3 H₂O
What are the 7 diatomic elements
H2, N2, O2, F2, Cl2, Br2, I2