Răspunsuri

2014-05-17T15:53:46+03:00
CM=nr moli/volum = 10 la -3 moli/10=>cM=10 la -4 moli
nr moli = masa HNO3/masa molara HNO3 = 63 * 10 la -3/63 = 10 la -3 moli
pH=-lg[HNO3]=-lg 10 la -4 => pH = 4 => raspunsul c

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