Dissolving - O

Question 1

How to convert g/dm^3 to mol/dm^3

Answer 1

divide by its mr

Question 2

How to find the new concentration of something when in solution

Answer 2

moles/(new total volume/1000)
aka. (original conc*original volume/1000)/(new total volume/1000)

Question 3

Equation for moles of the part

Answer 3

moles of the whole * subscript of the part

Question 4

Equation for conc of the part

Answer 4

conc of the whole * subscript of the part

Question 5

How to estimate out if a substance will dissolve

Answer 5

list forces in substance 1 and list forces in substance 2. List forces in mixture. Compare the strength of forces broken and made. If forces made are greater than or equal to forces broken then mixing/dissolving does occur.

Question 6

Estimate if NaCl will dissolve

Answer 6

Forces in NaCl = ionic bonding
Forces in H2O = hydrogen bonding
Forces in mixture = ion-dipole
As ion-dipole is stronger than hydrogen bonding it does dissolve

Question 7

Oder of attraction of forces that can form when mixing substances

Answer 7

(ionic bonding - but only ppt reactions), ion-dipole, H-bonding, ion-IDs, PDPDs, PDIDs, IDIDs

Question 8

If ions and polar molecules are mixed what type of force will occur

Answer 8

ion-dipole

Question 9

If ions and non-polar molecules are mixed what type of force will occur

Answer 9

ion-ID’s

Question 10

If molecules which can H-bond and molecules which can H-bond are mixed what type of force will occur

Answer 10

hydrogen bonding

Question 11

If molecules which can H-bond and molecules with a lone pair on F/O/N are mixed what type of force will occur

Answer 11

hydrogen bonding

Question 12

If molecules which can H-bond and polar molecules are mixed what type of force will occur

Answer 12

PDPDs

Question 13

If molecules which can H-bond and non-polar molecules are mixed what type of force will occur

Answer 13

PDID’s

Question 14

If polar molecules and polar molecules are mixed what type of force will occur

Answer 14

PDPDs

Question 15

If polar molecules and non-polar molecules are mixed what type of force will occur

Answer 15

PDIDs

Question 16

If non-polar molecules and non-polar molecules are mixed what type of force will occur

Answer 16

IDIDs

Question 16

How to work out what type of IMFs occurs

Answer 16

metallic/giant = no IMF
covalent -> what type of structure -> if giant = no IMF. If simple -> is hydrogen directly bonded to F/O/N -> if yes than hydrogen bonding and IDIDs. If no -> are there polar bonds -> if no = IDID’s. If yes -> is it symmetrical -> if yes = IDIDs. If no -> PDPDs and IDIDs
(look at photos)