Кальциевый пламенный тест

Определение кальция по оранжево-красному пламени

Flame Tests Beginner (Middle School) 15 мин ~$5,00

Цель

Наблюдать кирпично-красное или оранжево-красное пламя ионов кальция — элемента, содержащегося в известняке, мраморе и костях.

Предпосылки

Calcium produces a distinctive brick-red to orange-red flame color. The emission results from electronic transitions in calcium atoms excited by the flame energy. Calcium is one of the most abundant elements in the Earth's crust and its flame test is a useful diagnostic tool in mineral identification.

Предупреждения по безопасности

  • Wear safety goggles at all times
  • Keep hair tied back near open flames
  • Handle HCl with care

Требуемые СИЗ

goggles lab_coat

Материалы

  • Calcium chloride (CaCl₂) (1 g)
    Common road de-icer
  • Hydrochloric acid (HCl) (10 mL)
    1M concentration
  • Distilled water (50 mL)
    For cleaning

Оборудование

Bunsen burner Nichrome wire loop Watch glass Forceps

Процедура

1

Clean the nichrome wire by dipping in HCl and heating until no color appears.

2 мин
2

Place calcium chloride on the watch glass and collect a sample on the clean wire.

1 мин
3

Hold the wire in the Bunsen burner flame and observe the flame color.

2 мин
4

Record the brick-red to orange-red color and note how it differs from strontium and lithium.

2 мин

Ожидаемые результаты

A brick-red to orange-red flame should appear. The color is less vivid than strontium's scarlet and more orange than lithium's crimson. Calcium's flame is moderate in intensity.

Уборка

Clean the wire with HCl. Dispose of chemicals per lab protocol.

Детали

Категория
Flame Tests
Сложность
Beginner (Middle School)
Продолжительность
15 мин
Прим. стоимость
$5,00
Шаги
4
Материалы
3

Ещё эксперименты

Бариевый пламенный тест 20 min Калиевый пламенный тест 20 min Литиевый пламенный тест 15 min Медный пламенный тест 15 min Натриевый пламенный тест 15 min Сравнительная лаборатория пламенных тестов 45 min Стронциевый пламенный тест 15 min

Frequently Asked Questions

What is the objective of Кальциевый пламенный тест?
Наблюдать кирпично-красное или оранжево-красное пламя ионов кальция — элемента, содержащегося в известняке, мраморе и костях.
How difficult is Кальциевый пламенный тест?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for Кальциевый пламенный тест?
Key safety precautions include: Wear safety goggles at all times; Keep hair tied back near open flames; Handle HCl with care.
What materials are needed for Кальциевый пламенный тест?
The main materials required are: Calcium chloride (CaCl₂), Hydrochloric acid (HCl), Distilled water.
What results should I expect from Кальциевый пламенный тест?
A brick-red to orange-red flame should appear. The color is less vivid than strontium's scarlet and more orange than lithium's crimson. Calcium's flame is moderate in intensity.