misc things

Question 1

buffer solution use

Answer 1

soaps

Question 2

buffer solution human body

Answer 2

hco3- ions in the blood prevent acidosis by producing co2 with excess h+

Question 3

how are v(ii, iii, iv) ions produced

Answer 3

reduction of vanodate(v) ions with zn in acidic conditions

Question 4

what impacts redox potential of a transition metal?

Answer 4

pH and ligand

Question 5

as c-halogen bond enthalpy decreases

Answer 5

rate of reaction increases

Question 6

reducing ability down group 7

Answer 6

increases

Question 7

how kp changes with temperature

Answer 7

for exothermic, kp decreases with increased temperature

Question 8

solid water

Answer 8

produces a crystalline structure maintained by h bonds

Question 9

haber process

Answer 9

n2 + 3h2 >< 2nh3

fe as a heterogenous catalyst

Question 10

pvc- strength, what does a plasticiser do and uses

Answer 10

string due to polarity of c-cl bonds
make pvc more flexible
used for guttering and electrical cable insulation

Question 11

what is rate constant

Answer 11

constant for a given reaction when the only things changed are concentrations of reactants

Question 12

what is a nucleophile

Answer 12

donates a lone pair of electrons

Question 13

test for nh4+

Answer 13

add naoh, turns damp red litmus blue

Question 14

test for oh-

Answer 14

turns damp red litmus blue

Question 15

lithium cell reactions

Answer 15

positive electrode li+ + coo2 + e- > licoo2

negative electrode li > li+ + e-

Question 16

define order of reaction

Answer 16

power dependence of the rate on the concentration of each reactant

Question 17

how does increased temp affect rate constant

Answer 17

rate of reaction increases so rate constant increases