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General Chemistry Flashcards

7 cards from real OAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which of the following salts will produce a basic solution when dissolved in water?

    Answer: Na2CO3

    Na2CO3 is the salt of a strong base (NaOH) and weak acid (H2CO3), so its solution is basic due to hydrolysis of CO3²⁻.

  2. What is the hybridization of the carbon atom in CO2?

    Answer: sp

    Carbon in CO2 forms two double bonds with no lone pairs, requiring sp hybridization with a linear geometry.

  3. The Ksp of AgCl is 1.8 × 10⁻¹⁰. What is the molar solubility of AgCl in pure water?

    Answer: 1.3 × 10⁻⁵ M

    For AgCl → Ag⁺ + Cl⁻, Ksp = s² = 1.8×10⁻¹⁰, so s = √(1.8×10⁻¹⁰) ≈ 1.3×10⁻⁵ M.

  4. Which of the following colligative properties depends on the number of solute particles in solution?

    Answer: Boiling point elevation

    Boiling point elevation (ΔTb = Kb × m × i) is a colligative property that depends on solute particle concentration.

  5. Which of the following best describes a zero-order reaction?

    Answer: Rate is independent of reactant concentration

    In a zero-order reaction, the rate is constant and does not depend on the concentration of the reactant.

  6. Which intermolecular force is responsible for the relatively high surface tension of water?

    Answer: Hydrogen bonding

    Hydrogen bonding between water molecules creates strong cohesive forces, resulting in high surface tension.

  7. What happens to the equilibrium constant K when the temperature of an exothermic reaction is increased?

    Answer: K decreases

    For an exothermic reaction, increasing temperature shifts equilibrium toward reactants, decreasing K.