Предмет: Химия, автор: Aleksandra0811

CuSO4+Na2S=??
CuSO4+Na2CO3=??
Cr2(SO4)3+Na2S=?
FeSO4+Na2CO3=?

Ответы

Автор ответа: germ

CuSO₄ + Na₂S = CuS↓ + Na₂SO₄
2 CuSO₄ + 2 Na₂CO₃ + H₂O = (CuOH)₂CO₃↓ + 2 Na₂SO₄ + CO₂↑
Cr₂(SO₄)₃ + 3 Na₂S + 6 H₂O = 2 Cr(OH)₃↓ + 3 Na₂SO₄ + 3 H₂S↑
FeSO₄ + Na₂CO₃ = FeCO₃↓ + Na₂SO₄

Примечание. Последняя реакция проводится в инертной атмосфере, чтобы двухвалентное железо не окислялось кислородом до трехвалентного и не образовывалась смесь соединений.

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Математика, автор: Аноним

426,428. Помогите пожалуйста отдам 50 баллов.. срочно...

6 лет назад

Предмет: Английский язык, автор: sevaborki2007

ВЫПИСАТЬ ИЗ ТЕКСТА 4 ПРЕДЛОЖЕНИЯ PAST CONTINIONS
THE BEAR NECESSITIES

A woman from Vancouver, Canada, came home from work one day to find herself in the middle of a real-life nursery rhyme! Paula Green is now called 'Goldilocks' by her friends after finding a hungry bear in her kitchen. The two-year-old brown bear was eating Paula's porridge, so she quickly went into the next room and called for help. Eventually, the baby bear finished his meal and ran off into the forest. Luckily, there was no sign of a daddy or mummy bear!

SCORPION
IN BUNCH OF GRAPES!

A deadly scorpion found on a kitchen table caused panic for a family in Wales.
Michelle Smith, 42, thinks the scorpion came into her house inside a bag or grapes she bought at the supermarket! While the rest of the family were hiding, Mrs Smith's husband bravely caught the beast.

REAL LIFE LASSIE SAVES BOY'S LIFE. .

A dog was called a hero after he came to the rescue of his eight-year-old owner - just like in the film Lassie.
James Thomas broke his leg when he fell into a river. Realising he was badly hurt he called his dog 'Buddy' who amazingly pulled him to safety. James was recovering in hospital yesterday but can't wait to get home and say 'thank you' to Buddy!

6 лет назад

Предмет: География, автор: MarikKrava

количество осадков в тихом океане

6 лет назад