Дано
V = 24.2 см3 = 0.0242 дм3
Cm(NaOH) = 0.1 моль/дм3
Решение
n(NaOH) = VCm(NaOH) = 0.0242 * 0.1 = 0.00242 моль
2NaOH + H2SO4 = Na2SO4 + 2H2O
n(H2SO4) = 0.5n(NaOH) = 0.5 * 0.00242 = 0.00121 моль
m(H2SO4) = n(H2SO4)M(H2SO4) = 0.00121 * (2 * 1 + 32 + 4 * 16) = 0.00121 * 98 = 0.1186 г
ответ: 0.1186 г
Дано
V = 24.2 см3 = 0.0242 дм3
Cm(NaOH) = 0.1 моль/дм3
Решение
n(NaOH) = VCm(NaOH) = 0.0242 * 0.1 = 0.00242 моль
2NaOH + H2SO4 = Na2SO4 + 2H2O
n(H2SO4) = 0.5n(NaOH) = 0.5 * 0.00242 = 0.00121 моль
m(H2SO4) = n(H2SO4)M(H2SO4) = 0.00121 * (2 * 1 + 32 + 4 * 16) = 0.00121 * 98 = 0.1186 г
ответ: 0.1186 г