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QUESTION
What is pH when ##[H^+] = 8.43 * 10^-4## ##M##?
##pH=3.07##
##pH=-log_10[H^+]##, equivalently ##pH=-log_10[H_3O^+]##.
##-log_10(8.43xx10^-4)=-(-3.07)=3.07##
