Equations for GC

[Muggs]

---

Members don't see this ad.

On the actual DAT, do we have to go in knowing all the formulas, or are some provided?

For example, would calorimetry questions provide qmc(delta)T and n(delta)H?
And for Freezing pt. depression, (Delta)Tf = -iKfm?

It just seems like without some of these more obscure formulas provided, getting a problem right would come down to remembering the formula or not, which sounds pretty pointless.

 

[shimshimhey]

You need to know all the formulas. Sorry

 

[Djdents]

On the actual DAT, do we have to go in knowing all the formulas, or are some provided?

For example, would calorimetry questions provide qmc(delta)T and n(delta)H?
And for Freezing pt. depression, (Delta)Tf = -iKfm?

It just seems like without some of these more obscure formulas provided, getting a problem right would come down to remembering the formula or not, which sounds pretty pointless.

First of all, the formulas you mention are NOT obscure, they are important! Know them!
You will not get a formula sheet on the DAT but some questions provide you with constants or molecular masses. I don't think I got any formulas on mine though

 

[NDPitch]

Did you have to look up those formulas to post them here? If not, you're good to go. If you did, just memorize them. You'd be surprised, you probably already know them. There's not that many. Mole fraction. Freezing point depreession. Boiling point elevation. Q=mcdt. Partial pressures. Pv=nrt. It's very doable.

 

[Muggs]

One more question. For the freezing pt. depression and boiling pt elevation, KBB gives formulas without the van't hoff factor (i), while Chad gives the formulas with (i). Which one should be used?

 

[jhc83]

def use it with van't hoff factor (i). Also use it for osmotic pressure equation!