Предмет: Химия, автор: vasilenkodaria1

Лабораторний дослід 10 (7 клас)
Тема:Випробування водних розчинів кислот і лугів індикаторами.
ПЛИИИИЗ ПОМОГИТЕ, ДАМ 25 БАЛОВ

Приложения:

Ответы

Автор ответа: JaneStarzp
2

Ответ:Лакмус при дії з кислотами стає блідо червоним.

Метиловий оранжевий при дії з кислотами стає червоним.

Фенолфталеїн при дії з кислотами не міняє забарвлення (тобто безбарвний).

Лакмус при дії з лужним середовищем стає синім.

Метилоранж при дії з лужним сереловищем стає помаранчевим.

Фенолфталеїн безбарвний.

Висновки:

1.Обидві кислоти однаково змінюють забарвлення індикаторів, тому що індикатор у розчині кислоти набуває іншого забарвлення, ніж у розчинні лугу.

2.Обидва луги не однаково змінюють забарвлення індикаторів.

Загальний висновок:

Щоб розпізнати, у якій посудині міститься вода, розчин кислоти та розчин лугу, потрібно помістити універсальний індикатор. (Завдяки ньому можна розпізнати що в посудині по його кольору)

4.Б)

5.а)О2+SO2=H2SO3;

б)Ba+BaO=Ba(OH)2

Объяснение: Сподіваюсь на те що я змогла допомогти

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