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m(Na₂CO₃)=12г.
m(H₂SO₄)=9,8г.
Vm=22,4л./моль
V(CO₂)-?
1. Находим молярные массы карбоната натрия и серной кислоты:
M(Na₂CO₃)=23×2+12+16×3=106г./моль
M(H₂SO₄)=1×2+32+16×4=98г./моль
2. Находим количество вещества n в 12г. карбоната натрия и в 9,8г. серной кислоты: n=m÷M
n(Na₂CO₃)=m(Na₂CO₃)÷M(Na₂CO₃)=12г.÷106г./моль=0,1моль
n(H₂SO₄)=m(H₂SO₄)÷M(H₂SO₄)=9,8г.÷98г./моль=0,1моль
3. Записываем уравнение реакции взаимодействия карбоната натрия с серной кислотой: Na₂CO₃+ H₂SO₄=Na₂SO₄ + CO₂ +H₂O
4. Анализируем уравнение реакции: по уравнению реакции с 1 моль карбоната натрия взаимодействует 1моль серной кислоты и образуется 1моль оксида углерода(lV). У нас по условию 0,1карбоната натрия и 0,1моль серной кислоты значит образуется 0,1моль оксида углерода(lV),
5. Определяем объем оксида углерода(lV) количеством вещества 0,1моль:
V=n×Vm V(CO₂)=n(CO₂)x Vm = 0.1мольх22,4л./моль=2,24л.CO₂
6. ответ: при взаимодействии 12г. карбоната натрия с 9,8г. серной кислоты образуется оксид углерода(lV) объемом 2,24л.