Problema Solution
The "pH" scale for acidity is defined by "pH" = -\log_(10)["H"^+] where ["H"^+]is the concentration of hydrogen ions measured in moles per liter (M).
A solution has a "pH" of 7.8.
Calculate the concentration of hydrogen ions in moles per liter (M).
The concentration of hydrogen ions is
Answer provided by our tutors
"pH" = -\log_(10)["H"^+]
log_(10)["H"^+] = - 1/"pH"
["H"^+] = 10^(- 1/"pH")
for "pH" = 7.8 we have
["H"^+] = 10^(- 1/7.8)
["H"^+] = 0.7444 moles per liter (M)
The concentration of hydrogen ions is 0.7444 moles per liter (M).