Question

Give the pH value of milk of magnesia?

Answer 1

Hint: Magnesium hydroxide and magnesium dihydroxide are other names of milk of magnesia. When a compound is acidic, then its ph is less than 7 and it can have a large number of hydrogen ions and when a compound is basic then, the pH is more than 7 and it can have a large number of hydroxyl ions.

Complete answer:
pH is a property of a substance that is used to find the acidic and basic character. pH is a meter which is from 0 to 14. It is divided into three parts, i.e., 0 – 6.9, 7, 7.1 – 14. The first part, i.e., 0 – 6.9 is used to tell the acidic substance and it can have hydrogen ions that will dissociate when the substance is dissolved in water. The second part, 7 is used to tell neutral compounds like water. The third part, i.e., 7.1 – 14 is used to tell the basic substance and it can have hydroxyl ions that will dissociate when the substance is dissolved in water.
The given compound in the question is a milk of magnesia. Magnesium hydroxide and magnesium hydroxide are other names of milk of magnesia. The formula of milk of magnesia is $Mg{{(OH)}_{2}}$. This is a compound formed by two ions magnesium cation and hydroxyl anion, so it is a basic compound, therefore, the pH of milk of magnesia is 10.5.

Note:
Milk of magnesia is a medium basic compound because its pH is not so high and not so low. Some other compounds which have higher pH are detergent, soap, ammonia solution, household bleach, etc.