Unit 2 SAC 2

Question 1

What is the equation for SLC

Answer 1

V=nxVm
Vm= 24.8

Question 2

Equation for not at SLC

Answer 2

PV=nRT
p=pressure in kPa
V=volume in L
n= moles
R= 8.31
T= temp in K 273 at 0

Question 3

How do you convert atm to kPa

Answer 3

whenever you are doing any conversion you use the new over the normal, so 100kPa= 0.987

Question 4

write all formulas to find the moles

Answer 4

n=m/M
n=V/Vm
n=PV/RT
n=CxV
n=N/Na

Question 5

find answer

Answer 5

mass = nxM
vol = nxVm
v= nRT/P
c=n/V
c1v1=c2v2

Question 6

What happens to solubility of most ionic compounds if temp increases? why?

Answer 6

Both solute+solvent have more energy to overcome the forces of attraction that hold the particles together. As the solvent is heated the particles spread out so there is more space b/w the solute molecules to allow for the solute molecules to fit in b/w the solvent molecules.

Question 7

how do you find PPm or PPb

Answer 7

use both units of measurement over one another and then times by the part you are looking for

Question 8

how to find g/L

Answer 8

mass in g/vol in L

Question 9

how to find Mol/L

Answer 9

moles/volume

Question 10

how to find Percentage by mass

Answer 10

mass g/ mass g x 100

Question 11

how to find percentage by volume

Answer 11

vol/vol x 100

Question 12

how to find percentage mass by volume

Answer 12

mass g/ vol ml x 100

Question 13

Why do ionic compounds dissolve in water?

Answer 13

they dissolve in water when the positive cation from the ionic solid is attracted to the negative end of the water molecule (oxygen) and the negative anion of the ionic solid is attracted to the positive end of the water molecule (hydrogen).