What is the primary focus of the video tutorial?

• Testing for acids and bases

• Testing for organic compounds

• Testing for cations and anions

• Testing for gases

Which ion forms a white precipitate with sodium chloride?

• Lead

• Barium

• Calcium

• Copper

What color does barium produce in a flame test?

• Pale green

• Blue

• Yellow

• Red

Which ion is identified by a blue precipitate with sodium hydroxide?

• Iron (III)

• Iron (II)

• Calcium

• Copper

What color does thiocyanate produce with Fe 3+?

• Blue

• Green

• Bright red

• Yellow

Why is nitric acid used instead of other acids in anion testing?

• It does not contaminate the sample

• It is cheaper

• It is more acidic

• It reacts faster

What is observed when nitric acid is added to a carbonate ion?

• Precipitate forms

• Color change

• No reaction

• Bubbles form

What is the purpose of adding ammonia in anion testing?

• To neutralize the acid

• To form a precipitate

• To increase acidity

• To change color

Which ion forms a precipitate with calcium ions?

• Chloride

• Sulfate

• Nitrate

• Phosphate

What confirms the presence of chloride ions?

• Formation of a red precipitate

• No reaction

• Formation of a white precipitate that changes color in UV light

• Formation of bubbles