Question at position 5 Which of the following compounds is considered insoluble in water?Which of the following compounds is considered insoluble in water?Copper (II) hydroxidePotassium cyanideSilver nitrateAmmonium carbonateClear my selection

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BlackTom AI · Accepted Answer

Let’s evaluate the solubility of each compound in water based on general solubility rules and common patterns.
Option 1: Copper (II) hydroxide. Hydroxides are typically insoluble or only sparingly soluble except for alkali metals and some alkaline earths. Copper(II) hydroxide does not dissolve well in water, so it tends to remain as a solid, which fits the idea of being insoluble under ordinary conditions.
Option 2: Potassium cyanide. Cyanides of alkali metals, including potassium cyanide, are highly soluble in water due to strong ionic interactions with water molecules and favorable hydration, so this compound dissolves readily.
Option 3: Silver nitrate. Nitrates are almost universally soluble in water, and silver nitrate is no exception; it dissolves readily to form aqueous silver and nitrate ions.
Option 4: Ammonium carbonate. Ammonium salts, in particular ammonium carbonate, are generally soluble in water because the ammonium ion forms favorable interactions with water and the carbonate anion is stabilized in solution, leading to dissolution.
Putting these observations together, the compound that aligns with being insoluble (or only sparingly soluble) in water, while the others are clearly soluble, is the first option. While moving through the choices, notice the pattern in solubility rules: alkali metal salts and most nitrates are soluble, many hydroxides are not, and ammonium salts are typically soluble. This helps distinguish the insoluble case from the soluble ones.

Question at position 5 Which of the following compounds is considered insoluble in water?Which of the following compounds is considered insoluble in water?Copper (II) hydroxidePotassium cyanideSilver nitrateAmmonium carbonateClear my selection

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