3 years ago

The technique of separation employed to purify an organic solid that may be contaminated by

1 answer:

7 0

I believe the technique of separation employed to purify an organic solid that may be contaminated by impurities is called recrystallization.

It works by putting your solid in a container with some liquid, then boiling out the contaminants.

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Calculate the pHpH of a 0.10 MM solution of barium hydroxide, Ba(OH)2Ba(OH)2. Express your answer numerically using two decimal

Maurinko [17]

Answer:

13.301

Explanation:

To calculate the pH of the solution, we must obtain the pOH of the solution as illustrated below:

The dissociation equation is given below

Ba(OH)2 <==> Ba^2+ + 2OH^-

Since Ba(OH)2 dissociate to produce 2moles of OH^-, the concentration of OH^- = 2x0.1 = 0.2M

pOH = - Log[OH^-]

pOH = - Log 0.2

pOH = 0.699

But

pH + pOH = 14

pH = 14 — pOH

pH = 14 — 0.699

pH = 13.301

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