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Classify each of the following acids as a strong or weak electrolyte: (a) \(\mathrm{HF}(a q)\) (b) \(\mathrm{HCl}(a q)\) (c) \(\mathrm{HNO}_{3}(a q)\) (d) \(\mathrm{HNO}_{2}(a q)\)

Short Answer

Expert verified
HF and HNO鈧 are weak electrolytes; HCl and HNO鈧 are strong electrolytes.

Step by step solution

01

Understand Strong and Weak Electrolytes

Strong electrolytes dissociate completely in water, meaning they produce a large number of ions. Weak electrolytes only partially dissociate, resulting in fewer ions. Strong acids are typically strong electrolytes, while weak acids are usually weak electrolytes.
02

Analyze the Nature of Each Acid

Review the characteristics of each acid: (a) HF is hydrofluoric acid. It is a weak acid as it only partially dissociates in water. (b) HCl is hydrochloric acid, a strong acid known to dissociate completely in water. (c) HNO鈧 is nitric acid, another strong acid and completely dissociates in water. (d) HNO鈧 is nitrous acid, a weak acid, which only partially dissociates in water.
03

Classify Each Acid Based on Electrolyte Strength

Based on their dissociation properties, classify: (a) HF is a weak electrolyte. (b) HCl is a strong electrolyte. (c) HNO鈧 is a strong electrolyte. (d) HNO鈧 is a weak electrolyte.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Strong Electrolyte
In the world of chemistry, learning to differentiate between strong and weak electrolytes is key. Strong electrolytes are substances that completely dissociate into ions when dissolved in water. This full dissociation results in a high concentration of ions which makes the solution highly conductive.

Examples of strong electrolytes include most salts, strong acids, and strong bases. For instance, hydrochloric acid (HCl) and nitric acid (HNO鈧) are classic examples of strong acids. When these acids are introduced into water, they break apart fully into their ionic components, releasing hydrogen ions (H鈦) and the corresponding anions.
  • Complete Dissociation: Substances like HCl, when in aqueous form, transform entirely into H鈦 and Cl鈦 ions.
  • Conductivity: Due to the abundance of free ions, solutions of strong electrolytes are excellent conductors of electricity.
Weak Electrolyte
Unlike strong electrolytes, weak electrolytes only partially dissociate in water. This means that only a small fraction of the substance's molecules break down into ions, leading to a solution with a low ion concentration and, consequently, weak conductivity.

Weak acids are typical examples of weak electrolytes. Hydrofluoric acid (HF) and nitrous acid (HNO鈧) fall into this category. Despite being acids, they do not release a large number of hydrogen ions in solution, thereby exhibiting weak electrical conductivity.
  • Partial Dissociation: HF dissociates into ions to a lesser extent, largely remaining intact as HF molecules in solution.
  • Conductivity: Due to fewer ions, the solutions of weak electrolytes conduct electricity poorly compared to strong electrolytes.
Acid-Base Chemistry
Acid-base chemistry revolves around the behavior of acids and bases in solution, focusing on the transfer of hydrogen ions (H鈦). Acids are proton donors that release H鈦 ions when dissolved in water, while bases are proton acceptors that can neutralize acids.

In the context of electrolyte classification, the strength of an acid or base determines its capacity to dissociate and produce ions. Strong acids, like HCl and HNO鈧, fully release their available H鈦 ions, thus becoming strong electrolytes. Weak acids, such as HF and HNO鈧, release fewer H鈦 ions, aligning them with weak electrolytes.
  • Acid Strength: Strong acids completely ionize in water, while weak acids only partially ionize.
  • Base Interactions: Bases receive or interact with H鈦 ions, and like acids, they can be strong or weak.
Understanding these principals not only aids in classifying substances as strong or weak electrolytes but also informs how we anticipate these chemicals to behave in various reactions.

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Most popular questions from this chapter

Tartaric acid, abbreviated \(\mathrm{H}_{2}\) Tart, gives grapes a sour taste. If \(28.15 \mathrm{~mL}\) of \(0.295 \mathrm{M} \mathrm{NaOH}\) neutralizes \(0.623 \mathrm{~g}\) of acid, what is the molar mass of tartaric acid? $$ \mathrm{H}_{2} \operatorname{Tart}(a q)+2 \mathrm{NaOH}(a q) \longrightarrow \mathrm{Na}_{2} \operatorname{Tart}(a q)+2 \mathrm{H}_{2} \mathrm{O}(l) $$

State whether each of the following substances in an aqueous solution is highly ionized or slightly ionized: (a) strong acids (b) strong bases (c) soluble ionic compounds

Determine the acid and base that were neutralized to produce each of the following salts: (a) sodium fluoride, \(\operatorname{NaF}(a q)\) (b) magnesium iodide, \(\operatorname{MgI}_{2}(a q)\) (c) calcium nitrate, \(\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}(a q)\) (d) lithium carbonate, \(\mathrm{Li}_{2} \mathrm{CO}_{3}(a q)\)

Given the molarity and density for each of the following basic solutions, calculate the mass/mass percent concentration: (a) \(3.00 \mathrm{M} \mathrm{NaOH}(d=1.12 \mathrm{~g} / \mathrm{mL})\) (b) \(0.500 \mathrm{M} \mathrm{KOH}(d=1.02 \mathrm{~g} / \mathrm{mL})\) (c) \(6.00 \mathrm{MNH}_{3}(d=0.954 \mathrm{~g} / \mathrm{mL})\) (d) \(1.00 \mathrm{M} \mathrm{Na}_{2} \mathrm{CO}_{3}(d=1.10 \mathrm{~g} / \mathrm{mL})\)

Determine the acid and base that were neutralized to produce each of the following salts: (a) potassium bromide, \(\mathrm{KBr}(a q)\) (b) barium chloride, \(\mathrm{BaCl}_{2}(a q)\) (c) cobalt(II) sulfate, \(\operatorname{CoSO}_{4}(a q)\) (d) sodium phosphate, \(\mathrm{Na}_{3} \mathrm{PO}_{4}(a q)\)

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