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EmSAT Chemistry Flashcards

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

Read the first 6 EmSAT Chemistry flashcards as text

  1. What is the pH of a strong acid with [H⁺] = 0.01 M?

    Answer: 2

    pH = −log[H⁺] = −log(0.01) = −log(10⁻²) = 2.

  2. What happens when a weak acid dissolves in water?

    Answer: It partially ionizes, reaching equilibrium

    Weak acids only partially ionize in water, establishing an equilibrium between the ionized and non-ionized forms. This contrasts with strong acids, which fully dissociate.

  3. What is a buffer solution?

    Answer: A solution that resists changes in pH when small amounts of acid or base are added

    A buffer solution resists significant changes in pH when small amounts of acid or base are added. Buffers typically consist of a weak acid and its conjugate base (or vice versa).

  4. In a titration, what is the equivalence point?

    Answer: When moles of acid equal moles of base

    The equivalence point in a titration is the point at which the moles of acid are exactly equal to the moles of base — they have completely neutralized each other.

  5. What is the conjugate base of H₂CO₃?

    Answer: HCO₃⁻

    When H₂CO₃ donates a proton (H⁺), it becomes HCO₃⁻ (bicarbonate ion), its conjugate base. Conjugate base = acid − one proton.

  6. What type of reaction is HCl + NaOH → NaCl + H₂O?

    Answer: Neutralization

    The reaction between an acid (HCl) and a base (NaOH) producing a salt (NaCl) and water (H₂O) is a neutralization reaction.

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Sources & references

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  1. emsat.moe.gov.ae — Test delivery, eligibility, time limit, retake fee, retake policy, score release, exam format, exam information · verified Oct 2026
  2. mohesr.gov.ae — Eligibility · verified Oct 2026