Mængdeberegning og koncentration by Asmus Dalsgaard https://padlet.com/weloveaus/52q7o09ate39 Lavet med glæde en-us 2018-03-12 08:27:47 UTC 2023-10-06 16:51:28 UTC hello@padlet.com Mængdeberegning weloveaus https://padlet.com/weloveaus/52q7o09ate39/wish/240728624 2018-03-12 08:29:39 UTC https://padlet.com/weloveaus/52q7o09ate39/wish/240728624 Stofmængdekoncentration oli_wow_user23 https://padlet.com/weloveaus/52q7o09ate39/wish/240728713 V = volumen
n = stofmængde i mol
C er koncentration,
C1, kunne kaldes C-før og C2 kunne kaldes C-efter

Den aktuelle koncentration 
[A] = n/V

Den formelle koncentration
 C[A] = n/V  og  C1 * V1 = C2 * V2

Molær (Enheden for C):
M = mol/L 
]]> 2018-03-12 08:30:00 UTC https://padlet.com/weloveaus/52q7o09ate39/wish/240728713 Mol williamholsthyll https://padlet.com/weloveaus/52q7o09ate39/wish/240728939 2018-03-12 08:30:47 UTC https://padlet.com/weloveaus/52q7o09ate39/wish/240728939 1mol units=1gram williamholsthyll https://padlet.com/weloveaus/52q7o09ate39/wish/240728966 2018-03-12 08:30:55 UTC https://padlet.com/weloveaus/52q7o09ate39/wish/240728966 Unit til gram magnuscarlsen01 https://padlet.com/weloveaus/52q7o09ate39/wish/240729326 Ligningen til at lave unit til gram ser sådan ud:
U=1,66*10^-24 
]]> 2018-03-12 08:32:22 UTC https://padlet.com/weloveaus/52q7o09ate39/wish/240729326 weloveaus https://padlet.com/weloveaus/52q7o09ate39/wish/240730069 n = Stofmængden, mål i mol. 

m = Massen

M = Molmasse (g/mol)

]]> 2018-03-12 08:35:13 UTC https://padlet.com/weloveaus/52q7o09ate39/wish/240730069 Molmasse (M): williamholsthyll https://padlet.com/weloveaus/52q7o09ate39/wish/240730132 1mol stofs masse (m) i gram (g/mol) ]]> 2018-03-12 08:35:27 UTC https://padlet.com/weloveaus/52q7o09ate39/wish/240730132 Units og Mol oli_wow_user23 https://padlet.com/weloveaus/52q7o09ate39/wish/240730321  
1 unit = 1.66*1024 
 
1 mol = =  6.02*1023 
 
1 mol unit = 1g     
 
Hvis et stof har formelmassen X u, 
 så har 1 mol af stoffet X gram. 
]]> 2018-03-12 08:36:09 UTC https://padlet.com/weloveaus/52q7o09ate39/wish/240730321 williamholsthyll https://padlet.com/weloveaus/52q7o09ate39/wish/241760791 2018-03-14 09:15:35 UTC https://padlet.com/weloveaus/52q7o09ate39/wish/241760791 oli_wow_user23 https://padlet.com/weloveaus/52q7o09ate39/wish/241760967 2018-03-14 09:15:59 UTC https://padlet.com/weloveaus/52q7o09ate39/wish/241760967 Eksempel på opgave oli_wow_user23 https://padlet.com/weloveaus/52q7o09ate39/wish/241769714 100mL 0,100 M  NaCl oplandes med 50mL  0,020 M Na2So4 

Hvad er [Na+], [Cl-] og [So4]?
 
 
[Na]: 0.100mol/L*0.100L  ->  0.01 mol 
2*0.020mol/L*0.050 L -> 0.002 mol
 
0.01 mol + 0.002 mol = 0.012 mol -> 0.012 mol / 0.150L = 0.080 M 
 
[Cl]: 0.100*0.100 ->  0.01 mol /0.150L -> 0.066 M 
 
[So4]: 0.020 M * 0.050L= 0.001 mol  ->  
0.001 mol / 0.150L = 0.00667 M 
]]> 2018-03-14 09:43:11 UTC https://padlet.com/weloveaus/52q7o09ate39/wish/241769714