дано
m(ppa H2SO4) = 98 g
W(H2SO4) = 12.5%
m(KOH)-?
m(H2SO4) = 98 * 12.5% / 100% = 12.25 g
H2SO4+2KOH-->K2SO4+2H2O
M(H2SO4) = 98g/mol
n(H2SO4) = m/M = 12.25 / 98 = 0.125 mol
n(H2SO4) = 2n(KOH)
n(KOH) = 2*0.125 = 0.25 mol
M(KOH) = 56 /mol
m(KOH) = n*M = 0.25 * 56 = 14 g
ответ 14 г
Объяснение:
дано
m(ppa H2SO4) = 98 g
W(H2SO4) = 12.5%
m(KOH)-?
m(H2SO4) = 98 * 12.5% / 100% = 12.25 g
H2SO4+2KOH-->K2SO4+2H2O
M(H2SO4) = 98g/mol
n(H2SO4) = m/M = 12.25 / 98 = 0.125 mol
n(H2SO4) = 2n(KOH)
n(KOH) = 2*0.125 = 0.25 mol
M(KOH) = 56 /mol
m(KOH) = n*M = 0.25 * 56 = 14 g
ответ 14 г
Объяснение: