Asolution is made by mixing 0.05 ml of 1.0 m hcl with 999.95 ml of pure water. calculate the ph of the resulting solution (assume the total volume is 1.0 l).

Hydrochloric acid or HCl is classified as a strong acid which means it dissociates into ions completely when in water. It ionizes into hydrogen ions and chloride ions. pH is a scale which measures the acidity or alkalinity of a solution. It is expressed as the negative logarithm of the concentration of hydronium ions or the hydrogen ions. To determine pH, we need to determine the concentration of the hydrogen ions. We do as follows:

moles H+ = 1.0 M HCl ( 0.00005 L ) ( 1 mol H+ / 1 mol HCl ) = 0.00005 mol H+
Concentration of H+ = 0.00005 mol H+ / 1.0 L = 0.00005 M

pH = -log [H+]
pH = -log [0.00005]
pH = 4.3

16- counting by fours

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