Caffeine (c_8h_10n_4o_2) is a weak base with a k_b value of 4 times 10^-4. the ph of a 0.01 m solution of caffeine is in the range of: a. 2-3 b. 5-6 c. 7-8 d. 9-10 e. 11-12

The pH of the solution lies from 11 to 12.Hence, option e is correct.

Explanation:

The value of for caffine =

Initial

   0           0.01 M       0

AT equilibrium:

  x          (0.01 -x)M      x

Solving for x:

x = 0.0096 M

The pOH of the solution is given by :

pOH = 2.02

pH= 14 - pOH = 14 - 2.02 = 11.98

The pH of the solution lies from 11 to 12.

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explanation:

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.