indicate the concentration of each ion presentin the solution formed by mixing 20mL of .1M HCL and 10mL of .22 M HCL

1 answer

moles soln 1 = M x L = ?
moles soln 2 = M x L = ?
M mixture = total moles/total L
Then split that up between H^+ and Cl^- for the ions. Depending upon your teacher, you may want to use H3O^+ and not H^+.
Post your work if you get stuck.