Chemistry - LG 3A - 3B Chemical Reactions and the Law of Conservation of Mass
Is this chemical equation balanced? * 2 Fe2O3 + 3 C → 4 Fe + 3 CO2
Yes
Mass cannot be created or destroyed
Law of Conservation of Mass
Where is the reactant located in a chemical equation?
On the opposite side of the point of the arrow
What does the (a) stand for in a chemical equation?
The compound or element that is before the (a) is aqueous or it dissolved in water
What does (g) stand for in a chemical equation?
The compound or element that is before the (g) is after is a gas
What does the (s) stand for in a chemical equation?
The compound or element that is before the (s) is a solid
Why do we need to balance chemical equations?
We need to balance chemical equations based on the Law of Conservation of Mass because in a chemical equation, elements can't appear or disappear from the reactants to the products
What is the polyatomic ion is this chemical equation? * 2 Al + 3 (NO3) → Al2 (NO3)3
(NO3)
What is the polyatomic ion in this chemical equation? * CaSO4 + KOH → Ca(OH)2 + K2SO4
(OH)
How many "Al"'s total are in this chemical equation? * Al2(CO3)3 + H3PO4 → AlPO4 + CO2 + H2O
2
How many "H"'s are in the products in this chemical equation? * C2H6 + O2 → CO2 + H2O
2
How many "C"'s total are in this chemical equation? * C5H12 + O2 → CO2 + H2O
5
How many "S"'s are in the reactants in this chemical equation? * S8 + F2 → SF6
8
What is a polyatomic ion?
A set of two or more atoms together that have a specific charge *The element or compound would be in ( ).
Where is the product located in a chemical equation?
At the point of the arrow
What type of chemical reaction is this? * CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g)
Combustion reaction
What type of chemical reaction is this? * 2 Ni2O3 → 4 Ni + 3O2
Decomposition reaction
What type of chemical reaction is this? * 2 NaBr + BaCl2 → 2 NaCl + BaBr2
Double displacement reaction
What type of chemical reaction is this? * Br2 + 2 KI → 2 KBr + I2
Single displacement reaction
What type of chemical reaction is this? * 4 Al(s) + 3 O2(g) → 2 Al2O3(s)
Synthesis reaction