Предмет: Химия, автор: fedeckooleg545

4.У пробірках без підписів містяться речовини: гліцерол, етанол і етанова кислота.Як з допомогою хімічних реактивів визначити їх? ​

Ответы

Автор ответа: rosolodovnik
0

Ответ:

итак, глицерин - это многоатомный спирт, поэтому его определяем качественной реакцией, то есть добавляем Cu(OH)2 ( на фото)

потом определяем фенол, его можно определить бромной водой(Br2), индикатором метиловым оранжевым или FeCl3

и остается этанол, если что-то не понятно написано, то спрашивай)

Объяснение:

https://ru-static.z-dn.net/files/d10/0c71b8545695b022af0a1e31f53b00e9.jpg

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23. Have you got much/ many/some coffee?
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25. Have we got some/ any/ a lot of milk?
26. There was a few/ a little/ much food in the fridge. It was nearly empty.
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35. We ___________ at home last night. (be)
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