Question

The number of hydroxyl ions in 10 cm3 of 0-2 M HCl solution is​

Answer 1

Answer:

the number of hydroxyl ions in 10 cm³ of 0.2M HCl = 3 X 10¹²

Explanation:

Given

[H⁺] = 0.2 M

Volume = 10 cm³

[OH⁻] = ??

Solution

as we know that

[H⁺] [OH⁻] = 10⁻¹⁴

[OH⁻] = 10⁻¹⁴ /0.2

 [OH⁻] = 5 X 10⁻¹⁴ M

Concentration of hydroxyl ions in 0.2 M HCl = 5 X 10⁻¹⁴ M

the number of hydroxyl ions in 10 cm³ =  5 X 10⁻¹⁴ X 6.022 X 10²³ X 1000 /10

the number of hydroxyl ions in 10 cm³ of 0.2M HCl = 3 X 10¹²