Question

Calculate the number of H+ (or H3O+) ions and OH- ions in 1.0 mL of 0.100 M HCl.

Answer 1

The number of
`H^+` ions in 1.0 mL of 0.100 M HCl is 0.00010 mol. The number of
`OH^-` ions in 1.0 mL of 0.100 M HCl is negligible.

The number of
`H^+` (or
`H_3O^+`) ions in 1.0 mL of 0.100 M HCl can be calculated using the formula:

`n(H^+)` =
`[H_3O^+]` × Volume

Where
`[H_3O^+]` is the concentration of
`H^+` ions and Volume is the volume in liters. In this case,
`[H_3O^+]` = 0.100 M and Volume = 1.0 mL = 0.0010 L. Plugging these values into the formula, we get:

`n(H^+)` = 0.100 mol/L × 0.0010 L = 0.00010 mol

Therefore, the number of
`H^+` ions in 1.0 mL of 0.100 M HCl is 0.00010 mol.

Since HCl is a strong acid, it completely dissociates in water to form
`H^+` (or
`H_3O^+`) ions. Therefore, the number of
`OH^-` ions in 1.0 mL of 0.100 M HCl is negligible.