states? (1 Viewer)

[eunkuk91]

can someone help me in naming states states people keep telling me its just something that you will know naturally is it really? we are already using states in skool but i dun get why something is a liquid gas aqueous or solid

 

[brenton1987]

Are you saying you dont understand the difference between solids, liquids and gases?

 

[minijumbuk]

Temperature > Boiling point = gas
Melting point < Temperature < Boiling point = liquid
Temperature < Melting point = solid

Solute in water = aqueous

Let's use... NaCl for example?
Gas = when >1465 degrees celcius
Liquid = when > 801 and < 1465
Solid when < 801
Aqueous when dissolved in water

 

[eunkuk91]

Are you saying you dont understand the difference between solids, liquids and gases?

no im saying i dnt know how and what states to put in an equation.

 

[Pwnage101]

well, its either gna be (s), (l), (g), or (aq)

now u do understand that u LEARN all teh equ' u need tro know in class/from text books for teh HSC exam??? so if u run into any trouble, just ask ur teacher

plus, its not a 'natural' thing, but just comes with practice and UNDERSTANDING

It's hard to erxplain, but ill try a couple:

now, gases are pretty obvious - elements like nitrogen, oxygen, cholirne, hydrogen exist as DIATOMIC GASES at Room temp, ie H2, N2, O2, CL2 are all gases

all group 8 elemts exist as gases but are just atoms (ie He, NOT He2, etc)

now, u'll hardly get liquids as a state EXEPT with water - water is usually a liquid, and only a gas when temp exceeds 100 (ie in combustiuon reactions)

the only exception to this are:
- the very first expt u should have done - the bromine water expt - teh alkanes/alkenes should be in liquid form
-esterification (end of topic 2)
-combustion (ethanol, octane, whatever)
(that's off teh top of my head)

now solid is also a rare one, and u only get during precipitation reactions usually and a couple of other cases

now the main one will be (aq)
this applies for ALL ACID/BASE REACTIONS (ie neutralisation) in titrations

for example,. all acids/bases are (aq) when reacting:
HCL, H2SO4, NaOH, Na2CO3, NAHCO3 (the latter 2 are solid before u dissolve, but ull learn about that)

so yeh, if u have any troubles just post 'em up, id be happy 2 help
just read textbooks and try to get the hang of it

 

[eunkuk91]

wow ty i get a bit of understanding now