Chemical Bonding
What type of bond forms between a positively and a negatively charged ions?
Ionic bond
In the reaction Zn + Cu²⁺ → Zn²⁺ + Cu, which element is oxidized?
Zn
What is the purpose of a half-equation?
To show electron transfer
What is the empirical formula of C₆H₁₂O₆?
CH₂O)\
Name a property of metallic bonds.
- High melting&boiling points.
- Good conductors of heat and electricity due to free-moving electrons.
-Malleable and ductile
-Lustrous
What happens to the oxidation number during reduction?
Decreases
Balance: Cu²⁺ + e⁻ → Cu.
Cu²⁺ + 2e⁻ → Cu*
A compound has 75% C and 25% H. Calculate its empirical formula.
CH₄ju
What is valence electrons?
The outermost electrons
Balance the half-equation: Fe → Fe³⁺ + ___e⁻
3 electrons
Combine these half-equations: Al → Al³⁺ + 3e⁻ and O₂ + 4e⁻ → 2O²⁻
4Al + 3O₂ → 2Al₂O₃*
Convert 2.5 moles of C and 5 moles of H to an empirical formula
CH₂
State the octet rule
Atoms will gain, lose, or share electrons to complete their outer shell with 8 electrons.
Identify the oxidizing agent in 2Mg + O₂ → 2MgO
O₂
Write the balanced half equation for the reaction in which chlorine gas (Cl₂) is converted to chloride ions (Cl⁻).
Cl2+2e-→2Cl-
Why might the empirical and molecular formulas differ?
Molecular is a multiple of empirical
Predict the bonding in CO₂ and explain electricity conductivity
Covalent bonding, poor conductor of electricity
Explain why combustion is a redox reaction using CH₄ + O₂ → CO₂ + H₂O.
C is oxidized, O is reduced
Write the oxidation half-equation for the rusting of iron
Fe → Fe²⁺ + 2e⁻*
A compound has 52.2% Mn and 47.8% O. Find its empirical formula.
MnO₂