EVERYDAY SCIENCE

SCIENCE

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Aspect of analytical chemistry that begins with the need to identify what is present in the sample.
A
quantitative analysis
B
qualitative analysis
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -The chemists first use “qualitative” methods to identify what type of compound is present in the sample; then he adopts the quantitative analysis procedure to determine the exact amount or the quantity of the compound present in the sample.

Detailed explanation-2: -Qualitative analysis typically measures changes in color, melting point, odor, reactivity, radioactivity, boiling point, bubble production, and precipitation. Methods include distillation, extraction, precipitation, chromatography, and spectroscopy.

Detailed explanation-3: -Qualitative Analysis is the determination of non-numerical information about a chemical species, a reaction, etc. Examples would be observing that a reaction is creating gas that is bubbling out of solution or observing that a reaction results in a color change.

Detailed explanation-4: -Gravimetric analysis involves measuring how much analyte is present in a sample before and /or after drying.

Detailed explanation-5: -Analytes – components of a sample that are to be determined. Analytical chemists use science and technology to solve practical problems. Analytical chemistry is applied in all areas of science, industry, and medicine.

There is 1 question to complete.