Question

The pH of M/100 Ca(OH)2 is

Answer 1

Answer:- pH = 12.3

Answer:- M/100 calcium hydroxide means 0.01M solution. Calcium hydroxide is a strong base and breaks to give hydroxide ions in aqueous solution as:

$Ca(OH)_2\rightarrow Ca^+^2+2OH^-$

From this equation, 1 mol of calcium hydroxide gives 2 moles of hydroxide ion. So, the concentration of hydroxide ions would also be two times to the given concentration of calcium hydroxide.

$0.01MCa(OH)_2(\frac{2molOH^-}{1molCa(OH)_2})$

= 0.02 M $OH^-$

pOH is calculated using the formula:

$pOH=-log[OH^-]$

pOH =- log(0.02)

pOH = 1.7

Now, we could calculate the pH using the formula:

pH = 14 - pOH

pH = 14 - 1.7

pH = 12.3

So, the pH of M/100 calcium hydroxide solution is 12.3.

Answer 2

Answer:

Here is the solution in given attachment