I have a solution of 0.1M molarity.How do I get a soln of 0.8M,0.6,0.4M,0.2M from it?

Question

also how do i get .08,.06,.04M soln

Answer 1

as these solutions are more concentrated than the initial, you must evaporate the solvent if possible.

To have
0.1 from 0.8, you must take 800ml and evaporate to 100ml
0.1 from 0.6, you must take 600ml and evaporate to 100ml
0.1 from 0.4 you must take 400ml and evaporate to 100ml
0.1 from 0.2, you must take 200ml and evaporate to 100ml

Answer 2

To get the 0.08M soln, you need to add 100ml of 0.1M soln and add solvent to make up 125ml total.

To get the 0.06M soln, you need to add 300ml of 0.1M soln and add solvent to make up 500ml total.

To get the 0.04M soln, you need to add 100ml of 0.1M soln and add solvent to 250ml total.