Ba(OH)2 can be neutralized by adding an acid to the solution. We can add HCl to produce:
Ba(OH)2 + 2HCl ===> BaCl2 + 2H2O ; producing a salt BaCl2 and water.
or we can add H2SO4 to produce:
Ba(OH)2 + H2SO4 ===> BaSO4 + 2H2O; producing a salt, BaSO4, and water. <span />
PH = -log([H+])
[H+] = 10^(-pH)
[H+] = 10^(-8.78) = 1.65*10^-9
[H+][OH-] = Kw
Kw = 1.0*10^-14 at 25 degrees celsius.
[OH-] = Kw/[H+] = (1.0*10^-14)/(1.65*10^-9) = 6.06*10^-6
The concentration of OH- ions is 6.1*10^-6 M.
You know that neutrons<span> are found in the nucleus of an </span>atom<span>. Under normal conditions, protons and </span>neutrons<span> stick together in the nucleus. During radioactive decay, they may be knocked out of there. </span>Neutron<span> numbers are able to change the mass of </span>atoms<span>, because they weigh about as much as a proton and electron together.</span>
The electron has a mass of 1/1840 of a proton or neutron. Protons and neutrons have the same mass.
