Le Chatelier’s Principle/Ocean Acidification/Antacid Neutralization Rxns
What is Le Chatelier’s Principle?
When a system is disturbed, it shifts to restore balance.
What’s a strong vs. weak acid or base?
Strong = fully ionizes; weak = partly ionizes.
If 4.0 g of hydrogen (H₂) reacts with 20.0 g of oxygen (O₂) to form water (H₂O), which reactant is limiting?
(Balanced Equation: 2H₂ + O₂ → 2H₂O) answer O2
What is a double displacement reaction?
Two compounds swap ions: AB + CD → AD + CB.
What are intermolecular forces?
Forces between molecules (ex: dipole-dipole, dispersion, H-bonds).
2CO2(g) ---2CO(g)+O2 (g) if u add more Co2 which direction does it go left or right
right
What is pH?
A measure of how acidic or basic a solution is.
How many grams of CO₂ are produced from the combustion of 8.0 g of CH₄?
(Balanced Equation: CH₄ + 2O₂ → CO₂ + 2H₂O) answer 3:2
What is a single displacement reaction?
One element replaces another: A + BC → AC + B.
What is hydrogen bonding?
A strong IMF between H and N, O, or F.
N2 (g) +3H2(g)---2NH3(g) if add more NH3 which way would it go left or right
left
How are pH and pOH related?
oppisite from each other
What is the molarity of a solution prepared by dissolving 5.00 g of NaCl in 250.0 mL of solution?
Molar mass of NaCl = 58.44 g/mol → 5.00 g / 58.44 = 0.0855 mol
Volume = 250.0 mL = 0.2500 L
Molarity = mol / L = 0.0855 mol / 0.2500 L = 0.342 M
Answer: 0.342 M
What is molar mass?
Mass of 1 mole of a substance (g/mol).
What’s the formula for calcium chloride?
CaCl₂
How do humans impact the climate?
Burning fossil fuels adds CO₂, causing warming and acidification.
What happens when CO₂ increases in the atmosphere?
More CO₂ → more acid in oceans → lower pH.
Given the reaction: 2Al + 3Cl₂ → 2AlCl₃, what is the mole ratio of Cl₂ to AlCl₃?
3 mol Cl₂ : 2 mol AlCl₃
Answer: 3:2
How do you classify chemical reactions?
By type: synthesis, decomposition, single/double replacement, combustion.
What’s the name for Na₂SO₄?
Sodium sulfate
What does the equilibrium constant (K) show?
It shows if products or reactants are favored at equilibrium.
What does equilibrium mean in acid-base reactions?
Forward and reverse reactions occur at the same rate.
What does stoichiometry help you find?
Amounts of reactants or products in a chemical reaction.
Why balance chemical equations?
To follow the Law of Conservation of Mass.
Write the formula for aluminum nitrate.
Answer: Al(NO₃)₃