(DONE) Lecture 21

Question 1

Define bond polarity

Answer 1

• the measure of the inequality in sharing of electrons in a bond

Question 2

Define dipole and dipole moment

Answer 2

• 2 separated equal and opposite charges

- measurement of the separation of two opposite electrical charges (vector quantity)

Question 3

polar molecule

Answer 3

• unsymmetrical distribution of electrical charge

Question 4

non polar molecule

Answer 4

• symmetrical distribution of electrical charge (CO2, SO3, CH4)

Question 5

arrhenius acid vs arrhenius base (arrhenius theory)

Answer 5

• polar covalent molecules that form ions in the presence of water
• hydroxide containing compound that forms ions in the presence of water

Question 6

explain bronsted lowry theory

Answer 6

• an acid is a proton donor
• a base is a proton acceptor
• proton donation cannot occur without an acceptor

Question 7

coordinate bond formation

Answer 7

• both electrons in a bond come from one atom

Question 8

conjugate acid base pair

Answer 8

An acid and a base which differ only by the presence/ absence of a proton

• conjugate base: accepts proton
• conjugate acid - loses prton
  example: NH3 is called the conjugate base of NH4+; NH4+ is the conjugate acid of NH3

Question 9

what does it mean when its said that water is an amphoteric substance

Answer 9

• can donate a proton (act as an acid) or accept a proton (act as a base)

Question 10

monoprotic acids vs polyprotic acids

Answer 10

• donate 1 proton

- donate more than 1 proton