Chapter 4 Calculations Used In Analytical Chemistry

Question 1

What is molar analytical concentration?

Answer 1

Is the total number of moles of a solute, regardless of its chemical state, in 1L of solution. The molar analytical concentration describes how a solution of a given concentration can be prepared.

Question 2

What is the molar equilibrium concentration?

Answer 2

is the molar concentration of a particular species in a solution. It is necessary to know how the solute behaves when it is dissolved in a solvent.

Question 3

List the three common methods for percent concentration.

Answer 3

1. Weight percent (w/w)
2. Volume percent (v/v)
3. Weight/volume percent (w/v)

Question 4

What is chemical stoichiometry?

Answer 4

the stoichiometry of a reaction is the relationship between the number of moles of reactants and products as represented by a balanced chemical equation.

Question 5

What is empirical formula?

Answer 5

It gives the simplest whole-number ratio of atoms in a chemical compound.

Question 6

What is a molecular formula?

Answer 6

It specifies the number of atoms in a molecule.

Question 7

What is a structural formula?

Answer 7

It provides additional information, such as the differences in the structures of the same molecular formula.

Question 8

Which errors does absolute error express by?

Answer 8

1. absolute error - the difference between the measured value and the true value.
2. relative error - the absolute error divided by the true value.