Chemical testing Flashcards
What is the purpose of chemical testing in IGCSE Chemistry?
To identify the presence of specific substances or ions in a sample.
True or False: A flame test can be used to identify metal ions.
True.
Fill in the blank: The test for hydrogen gas involves __________ a lit splint into the gas.
popping.
Which ion is detected using the test for sulfate ions?
Barium ions.
What color flame indicates the presence of sodium ions?
Yellow.
Multiple Choice: Which reagent is used to test for the presence of chloride ions?
Silver nitrate.
What is the result of a positive test for carbon dioxide?
The limewater turns cloudy.
True or False: Ammonium ions can be detected by adding sodium hydroxide and heating.
True.
What color change occurs when phenolphthalein is added to a strong acid?
No color change; it remains colorless.
What is the test for the presence of starch in a sample?
Adding iodine solution, which turns blue-black.
