Предмет: Биология, автор: 2012penkova2012

2. Приведіть приклад сумішей, які складаються: а) двох твердих речовин і приведіть способ(способи) її очищення; б) приклад суміші, яку можна розділити відстоюванням.
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Ответы

Автор ответа: yulianavozniuk12
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Відповідь:

а) Приклад суміші двох твердих речовин: кухонна сіль і пісок.

Спосіб очищення:

Для видалення піску можна використовувати сито або фільтр. Пісок залишиться на сітці, а сіль пройде через отвори.

Додати воду до суміші, так що сіль розчиниться. Потім можна відфільтрувати отриманий розчин, відділяючи розчинену сіль від нерозчиненого піску.

б) Приклад суміші, яку можна розділити відстоюванням: сік із м'якоттю.

Спосіб розділення: після певного часу стоїння, тверді частинки (м'якоть) опустяться на дно, а чистий сік залишиться наверху. Можна відокремити їх, виливаючи чистий сік з верху.

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