Should I memorise the solubility rules? (1 Viewer)

[kittv]

The formula sheet has a bunch of Ksp values for sparingly soluble/ insoluble compounds so I was wondering if there's any reason I should memorise the whole solubility rules (which would take a lot of time)

I was thinking of running the If it's in the formula sheet =insoluble if it's not there =soluble strat should I not do that

 

[cheesynooby]

the formula sheet strat usually works but it's better to memorise at least the common solubility rules
e.g. knowing that all nitrates and group 1's are soluble would save a bit of time and i highly recommend learning that

there's always the chance they throw something that doesn't work at you, but if you're fine doing a bit of gambling and hoping that they don't, then by all means don't memorise them.

 

[wizzkids]

The formula sheet has a bunch of Ksp values for sparingly soluble/ insoluble compounds so I was wondering if there's any reason I should memorise the whole solubility rules (which would take a lot of time)

The K_sp values in the formula sheet should suffice for what you need to answer exam questions.
After all, the HSC Chemistry exam is not meant to be a test of your ability to memorise facts (hah!).
Have you tried using the normal acronyms?
NAGSAG = soluble salts
CaStroBear = insoluble
etc.
However, it is always preferable if you can understand the trends in the Periodic Table and why compounds are soluble or not.

 

[C2H6O]

For me the strat is just if it sounds insoluble then it’s probably insoluble. My friend and I tried this for a ton of compounds and it works every time. What I mean is “calcium carbonate” just sounds really insoluble iykwim, while “sodium hydroxide” just sounds really soluble. Never failed me

 

[C2H6O]

For eg without google or prior knowledge does “magnesium hydroxide” sound soluble?

Spoiler: Answer

it’s not soluble

Idk maybe I’m just yapping and this doesn’t work for anyone else

 

[wizzkids]

For me the strat is just if it sounds insoluble

OK.
So what do you think? Is ethylenediaminetetraacetic acid soluble or insoluble?

 

[C2H6O]

OK.
So what do you think? Is ethylenediaminetetraacetic acid soluble or insoluble?

Hmm definitely insoluble stuff with crazy names or Roman numerals just give off an insoluble vibe