Răspuns :
1)CaC2 + 2 H2O ---> C2H2 + Ca(OH)2
2)pt CaC2 = A calciu + 2 * A carbon = 40 + 2 * 12 = 64g/mol
pt Ca(OH)2 = A calciu + 2 * A oxigen + 2 * A hidrogen = 40 + 2 * 16 + 2 = 74g/mol
pt C2H2 = 2 * A carbon + 2 * A hidrogen = 2 * 12 + 2 = 26 g/mol
3)puritatea = (masa pura/masa totala)*100 => masa pura = (puritatea * masa totala)/100
masa pura = (400 * 90)/100 = 360 g carbid
4)la 64 g carbid........26 g acetilena
la 360 g carbid...........x g acetilena x = 146,25 g acetilena
la 64 g carbid...........74 g var stins
la 360 g carbid...............y g var stins y = 416,25 g var stins
Mentiune:acetilena = C2H2;var stins = Ca(OH)2;carbid = CaC2
2)pt CaC2 = A calciu + 2 * A carbon = 40 + 2 * 12 = 64g/mol
pt Ca(OH)2 = A calciu + 2 * A oxigen + 2 * A hidrogen = 40 + 2 * 16 + 2 = 74g/mol
pt C2H2 = 2 * A carbon + 2 * A hidrogen = 2 * 12 + 2 = 26 g/mol
3)puritatea = (masa pura/masa totala)*100 => masa pura = (puritatea * masa totala)/100
masa pura = (400 * 90)/100 = 360 g carbid
4)la 64 g carbid........26 g acetilena
la 360 g carbid...........x g acetilena x = 146,25 g acetilena
la 64 g carbid...........74 g var stins
la 360 g carbid...............y g var stins y = 416,25 g var stins
Mentiune:acetilena = C2H2;var stins = Ca(OH)2;carbid = CaC2