Measure the amount of certain radioactive elements in the rock when rocks are formed, small amounts of radioactive elements usually get included as the rock ages, more and more of the uranium changes into lead.
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Answer:
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Explanation:
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H+ conc = antilog to negative pH
H+ conc of pH 3 = 1 x 10^-3 M
One unit pH change of the H+ concentration is by a factor of 10. Since pH 3 to pH 5 is 2 unit changes, pH 3 then has one hundred<span> times more H+ concentration than a pH of pH 5. </span>