Back to Basics

Question 0

What is molar concentration or molarity?

Answer 0

The amount of solute dissolved in 1L of solution

Question 1

What is the solute concentration?

Answer 1

The amount of solute dissolved in a given quantity of solution

Question 2

What is the equation for molarity?

Answer 2

Molarity = moles of solute/litres of solution

Question 3

What is the relative molecular mass (RMM)?

Answer 3

The sum of the relative atomic masses of the atoms in a molecule

Question 4

What is the molar mass?

Answer 4

Mass of one mole of substance

Question 5

What is mass percent per volume? (%(w/v))

Answer 5

The number of grams of spite per 100mL of solution

Question 6

What is mole fraction?

Answer 6

Mole of substance divided by total number of mole

Question 7

What is milliequivalent (mEq)?

Answer 7

Concentration of an ion in solution

Question 8

What is a simple dilution?

Answer 8

When a volume of the a concentrated stock solution is added to a volume of solvent to achieve the required concentration

Question 9

Is the moles of solute the same before and after the dilution process?

Answer 9

Yes , the concentration decreases and volume increased by adding solvent but moles stay constant

Question 10

Does water conduct electricity?

Answer 10

Only when it contains ions

Question 11

What is an electrolyte?

Answer 11

A substances that completely dissociates into ions so can conduct electricity

Question 12

What is an nonelectrolyte?

Answer 12

A substance that does not dissociate into ions so can’t conduct electricity

Question 13

What are strong electrolytes? And give an example.

Answer 13

100% dissociation exists almost entirely as ions. E.g. HCL(aq)➡️H+(aq) + Cl-(aq)

Question 14

What is a weak electrolyte? And give an example.

Answer 14

Not completely dissociated, small percentage of ions. E.g. NH3(aq) + H20(l)↔️ NH4+(aq) + OH-(aq)

Question 15

What are serum electrolyte concentrations most expressed as?

Answer 15

mg/dL