Calculate the [H3O
+
] for 0.42 M HCl.
Answer in units of M.
HCl is a strong acid, it completely ionizes HCl + H2O --> H3O+ + Cl-
The concentration of H3O+ = the concentration of HCl.
To calculate the concentration of H3O+ ions in a solution of HCl, we need to understand that HCl is a strong acid that ionizes completely in water. This means that when HCl is dissolved in water, it breaks apart into H+ (hydrogen ions) and Cl- (chloride ions).
Since the concentration of HCl is given as 0.42 M, we can assume that this is also the concentration of H+ ions because HCl dissociates fully.
Therefore, the concentration of H3O+ ions is also 0.42 M.