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determinati concentratia morala a solutiilor care contin

a) 400g NaOH in 5l solutie

b) 196g H2SO4 in 200g solutie cu densitatea =1,84 g\cm3


Răspuns :

a)cM=m NaOH/masa molara NaOH * volumul = 400/40 * 5 = 2 M
b)c%=md/ms*100=196/200*100 = 98%
cM=c%*ro*10/masa molara H2SO4 = 98*1,84*10/98 = 18,4M