Qualitative analysis is carried out for _________________?
Correct answer: A. identification of elements
- A. identification of elements
- B. estimation of amounts of elements
- C. molar ration of elements
- D. molar volume of elements
Explanation
Qualitative analysis answers the question of what is present, so it is used to identify the elements or ions in a sample. It does not determine their amounts, ratios, or molar volume, which belong to quantitative analysis or calculation. The likely mistake is choosing b because analysis is generally associated with measurement, but qualitative analysis specifically concerns identity.
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About Moles and Avogadro's Number
The mole connects the microscopic number of particles with measurable mass, using Avogadro's number, 6.022 × 10²³ particles per mole. Questions involve molar mass, conversion between mass, moles and particles, percentage composition, empirical and molecular formulas, and distinguishing atoms, molecules, ions and formula units.
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