LO 21-28 (Exclude half-life)

What is Osmosis?

• is the flow of solvent from a solution of lower solute concentration to one of higher solute concentration

Why shouldn’t you drink sea water?

• Water from interior body cells goes to the concentration (high solute) seawater in the intestinal tract

What is the Van’t Hoff factor?

• the ratio of moles of particles in solution to moles of formula units dissolved

• moles of particles in solution/moles of formula units dissolved

Isotonic solution

• not net flow, equal amounts

• osmotic pressure saline = osmotic pressure of body

Hypertonic solution

• More solute outside of cell, water moves out causing it to shrink

• osmotic pressure saline > osmotic pressure body

Hypotonic solution

• more solute inside cell, water rushes in causing it to swell

• osmotic pressure saline < osmotic pressure body

What does the rates of reaction depend on

• the concentration of reacting particles

• temperature

• the structure and relative orientation of the reacting particles

According to collision theory…..

• an increase in concentration of the reacting particles increases reaction rate

Does the rate of reaction increase with increasing temperature?

• yes

What is the rate of reaction?

• change in concentration per unit of time

What decrease with time?

• reactant concentration

• average rate

When is the reaction rate the greatest?

• when it just begins

What is order of reaction determined by?

• only determined by experiment

• not determined by coefficients of balanced chemical equation

what is a rate law?

• shows how rate depends on concentration

• also called differential rate law

What is an integrated rate law?

• shows how concentration depends on time