Learning goal: to understand the relation between the strength of an acid or a base and its pka and pkb values. the degree to which a weak acid dissociates in solution is given by its acid-ionization constant, ka. for the generic weak acid, ha, ha(aq)⇌a−(aq)+h+(aq) and the acid-ionization constant is given by ka=[a−][h+][ha] similarly, the degree to which a weak base reacts with h2o in solution is given by its base-ionization constant, kb. for the generic weak base, b, b(aq)+h2o(l)⇌bh+(aq)+oh−(aq) and the base-ionization constant is given by kb=[bh+][oh−][b]

answer: the figure is attached herewith.

step-by-step explanation:   we are given to sketch a unit circle and label the terminal points corresponding to

in the attached figure, we have drawn a unit circle, with centre at o(0,0) and radius 1 unit. we have labelled the points a, b, c, d and e corresponding to the angles below

∠aox = 60°,

∠box = 120°,

∠cox = 180°,

∠dox = 240°,

∠eox = 300°.

and the coordinates are a(0.5,1), b(-0.5,1), c(-1,0), d(-0.5,-1) and e(0.5,-1).

thus, the answer is complete.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

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a