Question

Распределите известные вам вещества на 2 группы. Какие свойства веществ вы взяли за основу их разделения ________________ и __________________. Подпишите колонки таблицы: средство для мытья посуды; раствор стирального порошка; кефир; столовый уксус; мякоть банана; витамин С («аскорбинка»); мыло хозяйственное; сок лимона; шампунь; пищевая сода Б)Если яблоки и апельсины содержат аскорбиновую кислоту, лимоны – лимонную, то при действии индикатора синего лакмуса на срез этих фруктов цвет индикатора меняется на … В) Если к каустический соде (каустик, NaOH) добавить раствор_______________________, то цвет индикатора изменится на малиновый. ​

Answer 1

Ответ:

Органические и не органические

В) фенолфталиин

Answer 2

Grouping Substances Based on Properties

To group the given substances into two categories, we can consider their properties. Two possible properties that can be used for categorization are acidity/alkalinity and cleaning agents.

Categorization of Substances

Here is a categorization of the given substances based on the properties mentioned:

Acidity/Alkalinity: - Sour/Acidic: Lemon juice, vinegar, and ascorbic acid (vitamin C). - Neutral: Banana pulp and kefir. - Alkaline: Caustic soda (NaOH) solution.

Cleaning Agents: - Dishwashing: Dishwashing liquid and lemon juice. - Laundry: Laundry detergent and caustic soda (NaOH) solution. - Personal Care: Shampoo and household soap.

Table with Categorized Substances

| Acidity/Alkalinity | Cleaning Agent | |--------------------|----------------| | Dishwashing liquid | Dishwashing | | Laundry detergent | Laundry | | Kefir | Personal Care | | Vinegar | Dishwashing | | Banana pulp | Personal Care | | Ascorbic acid | Dishwashing | | Household soap | Personal Care | | Lemon juice | Dishwashing | | Shampoo | Personal Care | | Caustic soda | Laundry |

Indicators and Color Changes

B) When blue litmus paper is applied to the cut surface of apples, oranges, and lemons, the color of the indicator changes to red. This indicates that these fruits contain acids (ascorbic acid in apples and oranges, and citric acid in lemons) that react with the blue litmus paper, turning it red.

A) If a solution of phenolphthalein is added to caustic soda (NaOH), the color of the indicator changes to pink. Phenolphthalein is an indicator that turns pink in the presence of a base, such as NaOH.

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