Chemistry Solutions Quiz
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Questions and Answers

Which of the following best describes a solution?

  • A homogeneous mixture where all substances are visible with a microscope.
  • A homogeneous mixture of two or more substances that cannot be mechanically separated. (correct)
  • A mixture that only contains two substances.
  • A heterogeneous mixture where substances can be mechanically separated.

    • In a solution, what is best described as the 'solute'?

  • The substance that is dissolved. (correct)
  • The substance that dissolves another substance.
  • The substance that is readily available.
  • The container the substance is in.

    • Which of the following properties does NOT describe an aqueous solution?

  • Conductivity.
  • pH.
  • Ability to be filtered. (correct)
  • Solubility.

    • A substance that is considered 'slightly soluble' is likely what type of compound?

    <p>Molecular.</p> Signup and view all the answers

    What does it mean for a substance to be considered an 'electrolyte'?

    <p>It is conductive when dissolved in water.</p> Signup and view all the answers

    Which of the following is an example of a non-electrolyte when dissolved in water?

    <p>Sugar, <code>C6H12O6 (aq)</code></p> Signup and view all the answers

    What color will litmus paper turn when it comes into contact with an acid?

    <p>Red</p> Signup and view all the answers

    What is the pH value of a neutral solution?

    <p>7</p> Signup and view all the answers

    According to the Arrhenius Theory, what occurs when a substance dissolves?

    <p>The individual particles of the substance separate from each other</p> Signup and view all the answers

    When a very soluble ionic compound dissolves, what process occurs?

    <p>Dissociation</p> Signup and view all the answers

    What is the correct dissociation equation for copper (II) chloride?

    <p>CuCl2(s) → Cu2+(aq) + 2Cl-(aq)</p> Signup and view all the answers

    Which of the following compounds is expected to remain as a solid and NOT dissociate in water?

    <p>Silver bromide, AgBr</p> Signup and view all the answers

    Which of the following best describes what happens to soluble molecular compounds with hydrogen bonding when dissolved in water?

    <p>They remain as neutral compound particles.</p> Signup and view all the answers

    What process converts neutral atoms into ions?

    <p>Ionization</p> Signup and view all the answers

    Which of the following characteristics is NOT typical of insoluble molecular compounds?

    <p>They dissociate into ions.</p> Signup and view all the answers

    How do strong acids behave in solution?

    <p>They completely ionize into hydrogen and counter ions.</p> Signup and view all the answers

    Which of the following is a characteristic of slightly soluble ionic compounds?

    <p>They remain as solid compounds.</p> Signup and view all the answers

    What is the correct dissociation equation for ammonium carbonate?

    <p>(NH4)2CO3(s) → 2NH4+(aq) + CO32-(aq)</p> Signup and view all the answers

    What is the behaviour of a weak acid when dissolved in water?

    <p>It dissolves but does not completely ionize.</p> Signup and view all the answers

    What is NOT a major entity present in a solution?

    <p>Gaseous compounds</p> Signup and view all the answers

    How does the behavior of a substance during dissolution differ between an electrolyte and a non-electrolyte?

    <p>Electrolytes dissociate into ions, resulting in conductivity, whereas non-electrolytes do not and remain as molecules.</p> Signup and view all the answers

    What distinguishes the behavior of a polar molecular substance versus a non-polar molecular substance when introduced into water?

    <p>Polar compounds dissolve due to a 'like dissolves like' interaction, while non-polar compounds do not dissolve.</p> Signup and view all the answers

    For a substance that is termed 'slightly soluble,' which characteristic is typically expected?

    <p>It will be in a solid form and not dissociate readily in water.</p> Signup and view all the answers

    How does an acid differ from a base in terms of its effect on litmus paper and ion concentration in a solution?

    <p>Acids turn litmus red and increase $H^+$ concentration, while bases turn litmus blue and increase $OH^-$ concentration.</p> Signup and view all the answers

    If a substance does not change the color of litmus, what can be generally inferred about its pH and chemical nature?

    <p>It has a pH of 7 and is considered neutral.</p> Signup and view all the answers

    According to the principles of 'like dissolves like,' which of the following scenarios is most probable?

    <p>A polar solute dissolving in a polar solvent.</p> Signup and view all the answers

    During dissociation of ionic compounds in water as described by Arrhenius’ theory, what is the key process occurring at the submicroscopic level?

    <p>The separation of ions from the ionic crystal lattice into the solution.</p> Signup and view all the answers

    Given the reaction $NaCl(s) \rightarrow Na^+(aq) + Cl^-(aq)$, what is the driving force for this process according to what you know of the nature of solutions?

    <p>The dissociation of the crystal into solvated ions.</p> Signup and view all the answers

    How would one expect the conductivity of an aqueous solution containing a molecular substance to change as the amount of the substance dissolved increases?

    <p>The conductivity remains constant at zero because solutions from molecular substances are non-conducting.</p> Signup and view all the answers

    Which of the following cannot be separated through mechanical means?

    <p>A solution of salt and water</p> Signup and view all the answers

    Which of the following represents the correct dissociation of iron (III) nitrate in water?

    <p>Fe(NO3)3 (s) → Fe3+ (aq) + 3NO3- (aq)</p> Signup and view all the answers

    A solution is prepared by dissolving $C_{12}H_{22}O_{11}$ in water. What are the major entities present in this solution?

    <p>Individual $C_{12}H_{22}O_{11}$ molecules and water</p> Signup and view all the answers

    Which of the following correctly depicts the behavior of a slightly soluble ionic compound in water?

    <p>It remains primarily as a solid ionic compound, not dissociating</p> Signup and view all the answers

    Given that $Ba(OH)_2$ is a base, what is the expected dissociation behavior when it is dissolved in water?

    <p>It dissociates completely into $Ba^{2+}$ and $2OH^-$ ions if very soluble, or does not dissociate if slightly soluble.</p> Signup and view all the answers

    Which characteristic is most indicative of a strong acid in an aqueous solution?

    <p>It fully ionizes into hydrogen ions and its conjugate base.</p> Signup and view all the answers

    What is the correct dissociation equation for calcium hydroxide ($Ca(OH)_2$)?

    <p>$Ca(OH)_2(s) \rightarrow Ca^{2+}(aq) + 2OH^-(aq)$</p> Signup and view all the answers

    What are the expected major entities present when $CH_4$ is present in a solution:

    <p>$CH_4$ molecules and water molecules</p> Signup and view all the answers

    Which of the following best describes what happens when $HF$ is placed in water?

    <p>HF molecules only partially ionize into H+ and F- ions</p> Signup and view all the answers

    Which of the following best describes the behavior of polar molecules with hydrogen bonding when dissolved in water?

    <p>They remain as compound particles, do not ionize, and do not conduct electricity.</p> Signup and view all the answers

    How does the dissociation of $(NH_4)_2SO_4$ differ from the ionization of HCl?

    <p>$(NH_4)_2SO_4$ involves the physical separation of ions already present, while $HCl$ involves the formation of ions.</p> Signup and view all the answers

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