Предмет: Химия, автор: kuklalol114111

koh+cuso4 это обратимая реакция?​

Ответы

Автор ответа: referodziy
2

Ответ:

Реакция называется необратимой, если в результате реакции выпадает осадок, образуется вода или выделяется газ

2KOH + CuSO4 = K2SO4 + Cu(OH)2

гидроксид меди выпадает в осадок, значит реакция необратима

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Здравствуйте. Помогите пожалуйста перевести текст.

The boys at the workhouse1 ate in a large stone hall. At one end there was a copper2, out of which the master ladled3 gruel4 at mealtimes. Each boy had only one ladleful and no more, except  on public holidays when he had two ounces5 and a quarter of bread.

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Generally, boys have excellent appetites and so Oliver and his companions suffered from slow starvation for three months. They finally got so wild with hunger that one boy, who was somewhat tall for his age and not at all used to that sort of thing because his father had owned a small bakery, said to his companions that unless he had another spoon of  gruel daily, he was afraid that one night he might eat the boy who slept next to him. He seemed to have a wild, hungry look in his eye and the others entirely believed him. A meeting was held and lots were drawn to see who should walk up to the master after  supper that evening and ask for more. The task fell to Oliver Twist.

The evening arrived and the boys took their places. The master, in his cook's apron, stood beside the copper with his assistants behind him. The gruel was served out and a long grace6 was said. After the gruel disappeared, the boys whispered to each other and winked at Oliver, while his neighbours nudged him. Oliver was desperate with hunger and misery. He rose from  the table and, walking towards the master with his bowl, said,

'Please, sir, I want some more.

'The master was a fat, healthy man but he turned very pale. He gazed in astonishment at the boy for  some seconds and then held on to the copper for support. His assistants were paralysed with wonder and the boys with fear.

 

'What?' said the master eventually in a faint voice.  'Please, sir,' replied Oliver, 'I want some more.

' The master hit Oliver's head with the ladle, held him tightly in his arms and shrieked aloud for the policeman.

1 a place where the poor lived and did unpleasant jobs for food

2 oven made from bricks

3 serve soup with a deep spoon that has a long handle

4 boiled oats with water

5 an old unit of weight used in Britain (1 ounce=28 grammes)

6 prayer of thanks before eating
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