Methylamine, CH3NH2, is a weak base that reacts according to the reaction CH3NH2 + H2O <--> CH3NH3+ + OH- The value of the ionization constant, Kb, is 5.25 x 10 –4. Methylamine reacts to form salts such as methylammonium nitrate, (CH3NH3+)(NO3-). a. Calculate the hydroxide ion concentration, [OH-] of a 0.125 molar aqueous solution of methylamine.

Explanation:

   cM                           0             0

So dissociation constant will be:

Give c= 0.125 M and = ?

Putting in the values we get:

Thus hydroxide ion concentration of a 0.125 molar aqueous solution of methylamine is

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).