Unit 5 solutions

Question 1

Solution

Answer 1

One or more solutes mixed together at the molecular level in a solvent

Question 2

Equation for molarity

Answer 2

M=moles over volume

Question 3

percent composition

Answer 3

mass of solute/mass of solution times 100

Question 4

Mole fraction

Answer 4

moles of solute a over moles of solution

Question 5

Ppm

Answer 5

mass of solute over mass of solution times 10 to the power of 6

Question 6

Ppb

Answer 6

mass of solute over mass of solution times 10 to the power of 9

Question 7

What do solute and solvents have to do to form a solution?

Answer 7

Solute and solvent interactions have to overcome solute solute and solvent solvent interactions

Question 8

Like dissolves like

Answer 8

Substances with similar intermolecular forces dissolve in one another

Question 9

Henry’s law? what does each variable represent

Answer 9

C=kP

K is Henry’s constant

P is partial pressure of gas

Solubility is the concentrations

P2/P1=S2/S1

Question 10

freezing point depression

Answer 10

lowering freezing point of a solvent after adding solutes

Question 11

boiling point elevation

Answer 11

solutes raise(elevate) boiling point of solvent

Question 12

vapour pressure lowering

Answer 12

non volatile (substance that does not vaporize easily) solutes decrease the vapour pressure of solvent

Question 13

osmotic pressure

Answer 13

pressure that must be applied to a solution to prevent osmosis for a pure solvent like water

Question 14

Raoult’s law for non volatile solutes

Answer 14

P=XP^o

P is vapour pressure of solution

X mole fraction of solvent

P^o is vapour pressure of pure solvent

Question 15

what is the solution that obeys Raoult’s Law

Answer 15

ideal solution

Question 16

what contributes to vapour pressure in a volatile solute

Answer 16

solvent and solute

Question 16

osmosis

Answer 16

net flow of solvent through a semi-permeable membrane from a dilute solution to a more concentrated solution