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a fost răspuns

Se amesteca 400 g de solutie de soda caustrica de concentratie 10% cu 600 g de soda caustrica de concentratie 20%. Calculati concentratia solutiei finale. Urgent!!!!!!!!!​

Răspuns :

Mihaiimbrisca

Răspuns:

ms1=400g

C1=10%

ms2=600g

C2=20%

C3=?

md1=ms1xC1/100=400×10/100=40g

md2=ms2xC2/100=600×20/100=120g

md3=md1+md2=40+120=160g

ms3=ms1+ms2=400+600=1000g

C3=md3x100/ms3=160×100/1000=16%

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