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Chemistry Practice Test Flashcards

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

Read the first 6 Chemistry Practice Test flashcards as text

  1. What is the pH of a solution with a hydrogen ion concentration [H+] of 1 x 10^-4 M?

    Answer: 4

    pH = -log[H+] = -log(1 x 10^-4) = 4. This solution is acidic since the pH is below 7.

  2. Which type of chemical bond involves the sharing of electron pairs between atoms?

    Answer: Covalent bond

    Covalent bonds form when atoms share one or more pairs of electrons, typically occurring between nonmetal elements.

  3. In an exothermic reaction, what happens to energy?

    Answer: Energy is released to the surroundings

    Exothermic reactions release energy (usually as heat) to the surroundings, resulting in a negative enthalpy change (ΔH < 0).

  4. What is the molarity of a solution containing 58.5 grams of NaCl dissolved in enough water to make 2 liters of solution? (Molar mass of NaCl = 58.5 g/mol)

    Answer: 0.5 M

    Molarity = moles of solute / liters of solution. Moles of NaCl = 58.5g / 58.5g/mol = 1 mol. Molarity = 1 mol / 2 L = 0.5 M.

  5. Which of the following is a property of a buffer solution?

    Answer: It resists changes in pH when small amounts of acid or base are added

    Buffer solutions resist pH changes when small amounts of acid or base are added, maintaining pH within a narrow range.

  6. What type of reaction occurs when an acid reacts with a base to produce water and a salt?

    Answer: Neutralization

    A neutralization reaction occurs when an acid and a base combine to form water and a salt, typically bringing the pH closer to 7.