Question

Calculati cantitatea de metal care se gaseste in 5 tone amestec 40%calcar de 80% puritate si 60% piatra de var cu 10% imputitati.

Answer 1

5*40/100=2 tone CaCO3 (calcar)

puritatea = m pur/m impur*100 => mpur=80*2/100=1,6 tone CaCO3 pur

MCaCO3 = 100kg/kmol

1,6t=1600kg

In 100 kg CaCO3............................40 kg Ca
1600kg CaCO3...............................x=640kg Ca

60/100*5 = 3 tone piatra de var adica tot CaCO3

puritatea = m pur / m impur*100 =>m pur=90*3/100=2,7 tone CaCO3 = 2700 kg CaCO3 pur

In 100kg CaCO3.............................40 Kg Ca
In 2700kg CaCO3..........................x=1080kg Ca

m total Ca(metal) = 640+1080=1720kg = 1,72 tone Ca