Balancing Equations
•Balance the equation: H₂ + O₂ → H₂O
•2H₂ + O₂ → 2H₂O
What type of reaction is this: Na + Cl₂ → NaCl?
Synthesis
What does 'redox' stand for?
Reduction and Oxidation
What are two factors that can increase reaction rate?
Temperature, catalysts, concentration/proportion
What is the pH of a neutral solution?
7
Balance the Equation Na + Cl₂ → NaCl
2Na + Cl₂ → 2NaCl
What type of reaction is this: H₂O₂ → H₂O + O₂?
Decomposition
In a redox reaction, which substance is oxidized?
The substance that loses electrons
Why does a higher temperature increase reaction rate?
Higher temperature increases particle energy and collisions, speeding up reactions
What is the pH range of acids?
0–6.9
Balance the equation CH₄ + O₂ → CO₂ + H₂O
CH₄ + 2 O₂ → CO₂ + 2 H₂O
What type of reaction is this: AgNO₃ + NaCl → AgCl + NaNO₃?
Double Replacement
What gas is formed at the copper wire?
Hydrogen
Give an example of an exothermic reaction.
Yeast and hydrogen peroxide
What is the difference between a strong acid and a weak acid?
A strong acid has a lower pH level than a weaker one.
Balance the Equation: Fe + HCl → FeCl2 + H2
Fe + 2HCl → FeCl2 + H2
What type of reaction is this: CH₄ + 2 O₂ → CO₂ + 2 H₂O?
Combustion
In the Lemon and Copper Wire experiment, what is reduced?
Hydrogen ions
Give an example of an endothermic reaction.
Baking soda and water
What happens to the pH of a solution when more H⁺ ions are added?
It decreases
Balance the equation: Al + O2 = Al2O3
4Al + 3O2 = 2Al2O3
Classify this reaction: C₄H₁₀ + O₂ → CO₂ + H₂O
Combustion
Four real life applications of redox
rusting, respiration, photosynthesis, combustion of fuels, ripening of fruits, digestion, batteries
What is a catalyst?
A substance that speeds up a reaction without being consumed
A solution with pH 3 has ______times more H⁺ ions than a solution with pH 5?
1000