Question

200 ml of water is added to 500 ml of 0.2M solution.What is the molarity of this diluted solution?

Answer 1

Answer:

Explanation:

given that solution is .2 M  

now Molarity = moles / volume(in litres).

therefore .2=moles/.5

                =.1 moles

now 200 ml is added to the solution containing 0.1 moles

therefore molarity = .1/.7                                  (200+500 = 700 or  0.7 litres )

                              = 1/7 M