Qualitative Analysis

These flashcards cover key concepts from the lecture on qualitative analysis, focusing on methods, tests, and their importance.

What is qualitative analysis?

Qualitative analysis is the process used to identify unknown substances based on observations rather than measurements.

Why is qualitative analysis important?

It ensures lab and workplace safety and is utilized in forensics, environmental testing, health care, and food.

What are the initial observations to make about an unknown substance?

Initial observations should include the physical form (powder or liquid), color, and solubility.

What does a solubility test determine?

A solubility test determines if a substance can dissolve in water.

What color change indicates the presence of starch in the iodine test?

The presence of starch turns the iodine solution from yellow to blue-black.

What does a pH test indicate about a substance?

A pH test indicates whether a substance is acidic or basic based on color changes.

What indicates that carbonates are present in a vinegar test?

Bubbling during the reaction indicates that carbonates are present.

How does a flame test identify metal ions?

A flame test identifies metal ions by the color produced when the substance is exposed to flame.

What does a clear solution indicate in a solubility test?

A clear solution indicates that the substance is soluble in water.

What is one application of pH testing?

pH testing is used in soil testing, pools, medicine, and cosmetics.