Combination Flashcards
Definition of Combination
When multiple substances/reactants combine/ react to form a singular product/ionic compound
(explain how the reactants fill the structure)
What are the reactant/s of a combination reaction?
Two or more reactants are required in this reaction. a non-metal (often Oxygen) and ethier another non-metal(covalent bonding) or a metal
What are the product/s of a combination reaction?
Only one product is formed which is in the form of a compound.
The product is generally a Metal Oxide
What can combination be a reaction between?
An element and an element
An element and a compound
A compound and a compound
Are these reactions combination reactions or not?
- Fe + S → FeS
- 2H₂ + O₂ → 2H₂O
- H₂SO₄ + 2KOH → 2H₂O + K₂SO₄
- 2H₂O₂ → 2H₂O + O
- 2Mg + O₂ → 2MgO
- CH₄ + 2O₂ → CO₂ + 2H₂O
- C + O₂ → CO₂
- Na + Cl → NaCl
- HCl + NaOH → H₂O + NaCl
- Zn + 2HCl → ZnCl₂ + H₂
- Yes
- Yes
- No
- No
- Yes
- No
- Yes
- Yes
- No
- No
What are the main features of a balanced equation
There is the same type of atoms on both sides of the equation and there is the same number of atoms on both sides of the equation.
How can you tell a combination reaction had occurred
A lot of energy was produced, a new substance was formed and it isn’t easily reversed
How is mass conserved in a combination reaction?
The same atoms/elements are present in both the reactants and products. The atoms/elements combine to produce the product which contains the same atoms as the reactants. In the product the —– ions came from the —– and so on. The product is —– as it combines the two reacting elements. The reactants and products both contain the
same number of each type of atom (show example) .The reactants will weigh the same as the products unless a reactant or product has been introduced or lost from the system.
What happens if there is a limited supply of a reactant?
The reaction will end because there is none left of one of the reactants to react with the other reactant, therefore cannot continue.
