alice4349 05/06/2017 Olá!!!MM(Na2SO4.7H2O) = 2•23 + 32 + 4 • 26 = 142 + 7 • (2•1 + 16) = 142 + 7 • 18 = 268g/mol1L 1000mlV 2300mlV = 2,3Ln1 = m1 / MMn1 = 300g / 268g/moln1 = 1,11 molM = m / MM • VM = 300g / 268g/mol • 2.3LM = 300 / 616,4M = 0,48 mol/louM = n1 / VM = 1,11 mol / 2,3LM = 0.48 mol/l
alice4349
Olá!!!
MM(Na2SO4.7H2O) = 2•23 + 32 + 4 • 26 = 142 + 7 • (2•1 + 16) = 142 + 7 • 18 = 268g/mol
1L 1000ml
V 2300ml
V = 2,3L
n1 = m1 / MM
n1 = 300g / 268g/mol
n1 = 1,11 mol
M = m / MM • V
M = 300g / 268g/mol • 2.3L
M = 300 / 616,4
M = 0,48 mol/l
ou
M = n1 / V
M = 1,11 mol / 2,3L
M = 0.48 mol/l