Оқушылар екі валентті мыс сульфаты CuSO4 ерітіндісімен тәжірибе жасады. Тұз ерітіндісі бар құтының біріне X металын салды, келесі құтыға – құрамында Y металы бар құймадан жасалған шеге салды. Бірнеше сағаттан кейін қандай өзгеріс болады? Ерітінділер түсін өзгертті, яғни мыс сульфаты ерітіндіде жоқ.

Белсенді металдар – X және Y сульфаттағы мыстың орнын басып жаңа тұздар түзді. Металдар X және Y тотығып, мыс тотықсызданды.

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1. This guide is much better than what I have bought last week. It should be bought. 2. - You sometime were in Canada? - Yes. - When you were there? - I was there last year. 3. Annually London is visited by millions of tourists. 4. If you go to Australia, you will see wild animals in their natural conditions of dwelling. 5. - whether there are in this area some natural resources? - Yes, there is an iron ore here, but there is no oil. 6. I think, it is my ticket. And where yours? - And I think, wash it. 7. We have visited Niagara Falls before we have gone to the capital. 8. The authorities of Canada manage to support a high standard of living of the population. 9. In the government of any country there are Departments of Education, health care and defense.
Должно быть так, некоторые слова только из переводчика)

1. This guide is much better than what I have bought last week. It should be bought. 2. - You sometime were in Canada? - Yes. - When you were there? - I was there last year. 3. Annually London is visited by millions of tourists. 4. If you go to Australia, you will see wild animals in their natural conditions of dwelling. 5. - whether there are in this area some natural resources? - Yes, there is an iron ore here, but there is no oil. 6. I think, it is my ticket. And where yours? - And I think, wash it. 7. We have visited Niagara Falls before we have gone to the capital. 8. The authorities of Canada manage to support a high standard of living of the population. 9. In the government of any country there are Departments of Education, health care and defense.
Должно быть так, некоторые слова только из переводчика)