Which substances are not ionized in a aqueous solution?
Hi, KBr, H2SO4, HON2, AgCl, Ca(NO3)2
I haven't heard of HON2. All of the others are ionized although I wonder if you have misused the term; i.e., AgCl is very slightly soluble but it iws ionized none the less. H2SO4 is 100% ionized for the first H but only slightly for the second.
To determine which substances are not ionized in an aqueous solution, you need to understand the properties of the compounds and the concept of ionization.
Ionization is the process in which a compound breaks up into its constituent ions when dissolved in a solvent like water. In an aqueous solution, most ionic compounds dissociate into ions, while covalent compounds usually remain largely intact, or only partially dissociate.
Let's analyze each compound you listed:
1. KBr (Potassium Bromide): When KBr dissolves in water, it dissociates into potassium ions (K+) and bromide ions (Br-). Therefore, KBr does ionize in an aqueous solution.
2. H2SO4 (Sulfuric Acid): Sulfuric acid is a strong acid. When it dissolves in water, it completely ionizes into hydrogen ions (H+) and sulfate ions (SO4^2-). So, H2SO4 does ionize in an aqueous solution.
3. HON2 (Hydrazoic Acid): Hydrazoic acid is also an acid but it is a weak acid. It partially ionizes into hydrazoate ions (ON2-) and hydrogen ions (H+). Therefore, HON2 partially ionizes in an aqueous solution.
4. AgCl (Silver Chloride): Silver chloride is an ionic compound. When AgCl dissolves in water, it barely ionizes into silver ions (Ag+) and chloride ions (Cl-). So, AgCl only slightly ionizes in an aqueous solution.
5. Ca(NO3)2 (Calcium Nitrate): Calcium nitrate is an ionic compound. When Ca(NO3)2 dissolves in water, it fully ionizes into calcium ions (Ca^2+) and nitrate ions (NO3-). Thus, Ca(NO3)2 does ionize in an aqueous solution.
In summary, KBr, H2SO4, HON2, and Ca(NO3)2 ionize to some extent in an aqueous solution. However, AgCl only ionizes slightly, and most of it remains as intact molecules.