Flame tests Flashcards
What is a flame test used for?
A flame test is used to identify the presence of certain metal ions based on the color of the flame produced.
True or False: Sodium ions produce a blue flame.
False. Sodium ions produce a yellow flame.
Fill in the blank: The flame color of lithium ions is ______.
red
Which metal ion produces a green flame?
Copper(II) ions
What color flame do potassium ions produce?
lilac
How should samples be prepared for a flame test?
Samples should be cleaned, usually by dipping a clean wire loop into hydrochloric acid, and then rinsed with distilled water.
Multiple choice: Which of the following ions produces a crimson red flame? A) Sodium B) Lithium C) Barium
B) Lithium
What is the role of the wire loop in a flame test?
The wire loop is used to hold the sample and place it into the flame.
True or False: Flame tests can be used to identify non-metal ions.
False. Flame tests are primarily used for metal ions.
What color flame indicates the presence of calcium ions?
orange-red
Fill in the blank: The flame color of barium ions is ______.
green
Which ion produces a white flame?
Magnesium ions
Multiple choice: Which ion is indicated by a blue flame? A) Copper B) Potassium C) Sodium
A) Copper
What safety precautions should be taken during flame tests?
Wear safety goggles and a lab coat, and handle the flame carefully.
What does the intensity of the flame color indicate?
The intensity can indicate the concentration of the metal ion present.
Fill in the blank: ______ ions produce a yellow flame.
Sodium
True or False: The flame test is a qualitative analysis method.
True. It is used to determine the presence of specific ions.
What is the first step in conducting a flame test?
Clean the wire loop to avoid contamination.
Which ion produces a bright green flame?
Boron ions
Multiple choice: The flame test can easily distinguish between which two ions? A) Sodium and Potassium B) Calcium and Copper C) Lithium and Barium
A) Sodium and Potassium
