Answer
a) Qualitative - Water can exist as solid, liquid, or gas.
Quantitative - The boiling point of water is 100 degrees Celsius.
b) Qualitative - Carbon can form covalent bonds with other atoms.
Quantitative - The molecular weight of carbon is 12.01 g/mol.
c) Qualitative - Iron is a shiny grayish metal that can rust easily.
Quantitative - Iron has a density of 7.87 g/cm^3
d) Qualitative - Hydrogen gas is highly combustible.
Quantitative - The enthalpy of combustion for hydrogen gas is -286 kJ/mol.
e) Qualitative - Sucrose is a white, odorless, sweet-tasting crystalline solid.
Quantitative - Sucrose has a molecular weight of 342.3 g/mol.
f) Qualitative - Table salt is a white crystalline solid.
Quantitative - The melting point of sodium chloride is 800.7 degrees Celsius.
g) Qualitative - Mercury is a dense, silvery-white, and toxic liquid metal.
Quantitative - Mercury has a molecular weight of 200.59 g/mol.
h) Qualitative - Gold is a precious metal and is a good conductor of heat and electricity.
Quantitative - Gold has a boiling point of 2700 degrees Celsius.
i) Qualitative - Air comprises of different gases.
Quantitative - Air has density of 0.001 g/cm^3 when measured at a temperature of 25 degrees Celsius and pressure of 1 atm.
Work Step by Step
Qualitative statements are descriptive. You just have to describe the characteristics of the element/molecule/substance/mixture in question.
Quantitative statements comprise of measurements and hence are accompanied by numerical values. The properties to be measured can either be intensive (non-dependent on amount of matter being measured) or extensive (amount-dependent).
