An aqueous solution contains 0.050 m of methylamine, with kb = 4.4 x 10-4. what is the percent ionization and the ph of the solution?

The base dissociation constant or Kb is a value used to measure the strength of a specific base in solution. To determine the percent ionization of the substance we make use of the Kb given. Methylamine or CH3NH2 when in solution would form ions:

CH3NH2 + H2O < = >  CH3NH3+ + OH- 

Kb is expressed as follows:

Kb = [OH-] [CH3NH3+] / [CH3NH2]

Where the terms represents the concentrations of the acid and the ions. 

By the ICE table, we can calculate the equilibrium concentrations,
     CH3NH2    CH3NH3+             OH- 
I      0.05            0                         0
C      -x               +x                      +x
 
E  0.05-x             x                       x

Kb = [OH-] [CH3NH3+] / [CH3NH2] = 4.4 x 10^-4

Solving for x,

x = [OH-] = 0.00448 M 

percent ionization = 0.00448 / 0.05 x 100 = 8.96%

pH = 14 + log 0.00448 = 11.65

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.