chads videos acidic and basic salt question

[rmm30]

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can somebody who took notes clarify something for me on chads videos. it's regarding how to determine wheter a salt is acid or basic. my subscription has expired and i think i may have gotten the notes mixed up. as i understand the following applies for cations: all group IA cations, Ca, Sr, Ba, and transition metals with +1 charge are neutral. all other transition metals are acidic as well as NH4+. What about the other metals (Mg for example). I dont think he mentions this one. also what happens when a salt is formed with an acidic cation and basic anion? how is acidity or basicity determined?

 

[sbdento]

He says:

Group 1 and 2 or the cations associated with strong bases are negligible. He said that he would just "throw Mg" in there too

All anions associated with a strong acid are negligible, except for HSO4(it is acidic)

Transition metals that are +1 are "pretty much" negligible

All other cations are acidic and anions are basic.

He didn't mention what would happen if the cation was acidic and anion was basic, probably something like the world would end, but I'm not sure.

 

[Cool Beans]

He didn't mention what would happen if the cation was acidic and anion was basic, probably something like the world would end, but I'm not sure.

If the cation is acidic and the anion is basic then you'll need the Ka of the acid cation and the Kb of the base anion and whichever is larger wins. The exception to this is if the anion is hydroxide (OH-), then it's going to beat any cation it's with. A hard question for them to ask on the DAT as they would have to supply us with a lot of info to make it doable.

 

[rmm30]

all cleared up. thanks so much for the help.