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The latest pH away from an example off vinegar is actually step three Question 13. 76. Calculate the concentration of hydrogen ion in it. Answer: pH = – logten [H3O + ] = – log10 = – pH = – 3.76 = \(\overline\).dos4 [H3O + ] = antilog \(\overline<4>\).24 = l.738 x 10 -4 [H3O