What is the #pH# for a #0.020molL^-1# solution of #HCl(aq)#?

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Answer 1 · 2016-09-14T18:24:59

#pH=1.70#

#pH=-log_10[H_3O^+]#

#=# #-log_10(0.02)#, given that we assume hydrochloric acid dissociates completely to give stoichiometric #H_3O^+(aq)#:

#HCl(aq) +H_2O(l) rightleftharpoons H_3O^+ + Cl^-#

What is the #pH# for a #0.020*mol*L^-1# solution of #HCl(aq)#?