Concentration Formula Questions

Question 1

Calculate the number of moles of chemicals and each of the following solutions:

A. 25cm3 of a 1.0 mol l-1 solution.

Answer 1

N
C|V

N= CxV= 1x0.025= 0.025 moles

C= 1.0 mol l-1

V= 25cm3÷1000= 0.025cm3

Question 2

Calculate the number of moles of chemicals and each of the following solutions:

B. 50cm3 of a 0.5 mol l-1 solution.

Answer 2

N
C|V

N= CxV= 0.5x0.05= 0.025 moles

C= 0.5 mol l-1

V= 50cm3÷1000= 0.05cm3

Question 3

Calculate the number of moles of chemicals and each of the following solutions:

C. 250cm3 of a 0.25 mol l-1 solution.

Answer 3

N
C|V

N= CxV= 0.25x0.25= 0.0625 moles

C= 0.25 mol l-1

V= 250cm3÷1000= 0.25cm3