As a chemistry expert with a focus on acid-base chemistry, it is my pleasure to delve into the nature of substances and their behavior in aqueous solutions. The question at hand is whether "Ki" is an acid or a base. However, it seems there might be a slight misunderstanding or typo in the chemical formula provided. The compound "Ki" is not a standard chemical notation, and it's possible that you meant "KI," which stands for potassium iodide.

Potassium iodide (KI) is a salt derived from the reaction of hydroiodic acid (HI) and potassium hydroxide (KOH). To understand whether a salt is acidic, basic, or neutral, we must consider the strength of the acid and base from which it is derived.

In the case of potassium iodide, the potassium ion (K+) comes from a strong base, KOH, which fully dissociates in water to form K+ and OH- ions. The iodide ion (I-) comes from the hydroiodic acid (HI), which is a strong acid that also fully dissociates in water to form H+ and I- ions.

When these ions are combined in the form of KI, they do not undergo hydrolysis in water. This is because the K+ ion does not have a tendency to accept a proton (H+) to form KOH, and the I- ion does not have a tendency to donate a proton to form HI. Therefore, the solution of potassium iodide in water remains neutral; it does not alter the pH of the solution significantly.

Now, let's address the reference material provided. It mentions that the ions from KCl come from a strong acid (HCl) and a strong base (KOH), making KCl a neutral salt. This is correct. The potassium ion (K+) from KOH does not hydrolyze because it is the conjugate base of a strong acid (HK), and the chloride ion (Cl-) from HCl does not hydrolyze because it is the conjugate acid of a strong base (KOH). Both ions are spectator ions that do not affect the pH of the solution.

However, when discussing the NO2- ion, it is important to clarify that NO2- is not a standard ion derived from a weak acid. The reference to "HNO2" seems to be a mistake, as HNO2 is actually nitrous acid, which is a weak acid, and its conjugate base would be NO2-. But NO2- itself is not typically considered in the context of acid-base chemistry in the same way that other ions like OH- or H+ are. It is more commonly associated with redox reactions rather than acid-base equilibria.

In summary, KI is a salt that results from a strong acid and a strong base and is therefore neutral in solution. It does not contribute to the acidity or basicity of the solution. The provided reference material is partially correct in its explanation of KCl, but the mention of NO2- and HNO2 seems to be a confusion and does not directly relate to the question about "Ki" or KI.

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Identify each salt as acidic, basic, or neutral. The ions from KCl derive from a strong acid (HCl) and a strong base (KOH). Therefore, neither ion will affect the acidity of the solution, so KCl is a neutral salt. Although the K + ion derives from a strong base (KOH), the NO 2 ? ion derives from a weak acid (HNO 2).read more >>