Ions

Question 1

What is a flame test used for?

Answer 1

A flame test is used to identify the presence of certain metal ions based on the color they emit when heated.

Question 2

True or False: The flame color can indicate specific metal ions.

Answer 2

True

Question 3

What color flame does lithium produce?

Answer 3

Lithium produces a crimson red flame. (Li+)

Question 4

Fill in the blank: Sodium ions produce a __________ flame.

Answer 4

bright yellow (Na+)

Question 5

Which metal ion produces a orange flame?

Answer 5

Calcium (Ca2+)

Question 6

Multiple Choice: Which of the following ions produces a lilac flame? A) Potassium B) Sodium C) Calcium

Answer 6

A) Potassium (K+)

Question 7

What is the flame colour associated with copper ions (Cu2+)?

Answer 7

Green to blue-green flame.

Question 8

True or False: Ammonium ions can be detected using a flame test.

Answer 8

False

Question 9

What is a common method to test for ammonium ions?

Answer 9

Ammonium ions are commonly tested using a reaction with sodium hydroxide and heat, producing ammonia gas (tested with litmus paper).

Question 10

What observation indicates the presence of ammonium ions when reacting with sodium hydroxide?

Answer 10

The production of ammonia, which turns blue with litmus paper

Question 11

What is the purpose of using a clean wire loop in flame tests?

Answer 11

To prevent contamination and ensure accurate results.

Question 12

True or False: Different metal ions can produce similar flame colors.

Answer 12

True