дано
W(H3PO4) =10%
m(KOH) = 348 g
m(ppa H3PO4) -?
3KOH+H3PO4-->K3PO4+3H2O
M(KOH) = 56 g/mol
n(KOH) = m/M = 348 / 56 = 6.21 mol
3n(KOH) = n(H3PO4)
n(H3PO4) = 6.21 / 3 = 2.07 mol
M(H3PO4) = 98 g/mol
m(H3PO4) = n*M = 2.07 * 98 = 202,86 g
m(ppa H3PO4) = 202.86 * 100% / 10% = 2028.6 g
ответ 2028.6 г
Объяснение:
дано
W(H3PO4) =10%
m(KOH) = 348 g
m(ppa H3PO4) -?
3KOH+H3PO4-->K3PO4+3H2O
M(KOH) = 56 g/mol
n(KOH) = m/M = 348 / 56 = 6.21 mol
3n(KOH) = n(H3PO4)
n(H3PO4) = 6.21 / 3 = 2.07 mol
M(H3PO4) = 98 g/mol
m(H3PO4) = n*M = 2.07 * 98 = 202,86 g
m(ppa H3PO4) = 202.86 * 100% / 10% = 2028.6 g
ответ 2028.6 г
Объяснение: