Concentraion

Question 1

What is concentration?

Answer 1

Concentration is the amount of solute per unit volume of solution

Question 2

What is a solute?

Answer 2

A solute is something that dissolves in a solvent to give a solution.

Question 3

What are the units of concentration?

Answer 3

gdm^-3 or moldm^-3

Question 4

How do you convert gdm^-3 to moldm^-3?

Answer 4

By dividing the concentration in gdm^-3 by the molar mass of solution

Question 5

To represent that you are stating the concentration of a substance, what can you do?

Answer 5

Put square brackets around the formula of the substance being given

Question 6

How many cm3 are in 1 litre?

Answer 6

1000

Question 7

What is 1dm3 equivilent to in

a) cm3
b) in litres

Answer 7

a) 1000

b) 1

Question 8

What is the most useful equation for concentration? Give the meaning of any letters given

Answer 8

cv / 1000 = number of moles in solution
where C = concentration of solution in mol dm^-3
where V = volume of solution in cm3