The M OH Ca(OH i concentration I lacoH 2 solution conce s.Ox10 in a is? a)...

Question

Question

The M OH Ca(OH i concentration I lacoH 2 solution conce s.Ox10 in a is? a) 0.50 x 10- 3M b) 4.0 x10 -3 M c) 2.0 x 10-3M d) 1.

Answer 1

Answer #1

Given : concentration of Ca(OH)₂ = 5.0 x 10^-3 M

Calcium hydroxide Ca(OH)₂ is a strong base which completely dissociates according to the equation :

Ca(OH)₂ (aq) $\rightarrow$ Ca²⁺ (aq) + 2 OH^- (aq)

1 molecule of Ca(OH)₂ gives 2 ions of OH^-

concentration of OH^- = 2 * (concentration of Ca(OH)₂)

concentration of OH^- = 2 * (5.0 x 10^-3 M)

concentration of OH^- = 10.0 x 10^-3 M

concentration of OH^- = 1.0 x 10^-2 M

Correct option is (d) 1.0 x 10^-2 M

Answer 2

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