Răspunsuri

2014-08-31T12:22:05+03:00
CM=nr moli/volum
nr moli = masa substanta/masa molara substanta
=> cM = md/(masa molara * volum)
=> cM = 9,125 * 10 la -3/(36,5 * 0,25) = 10 la -3 M
pH = -lg [cM] = - lg 10 la -3 => pH = 3
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