Making Solutions from Solids

1) I put 10g of NaCl into a 250ml beaker. I then distributed H2O in intervals of 20ml and watched as the molarity decreased. once i got close to my target morality of 1.0M i decreased the interval amount to 5ml. I had 165g of H2O in the beaker when the molarity of my solution became 1.0M. I them poured 100ml of my solution into a volumetric flask, thus completing the problem.

2)I poured 10g of MgCl2 into a 250ml beaker. I then added 200ml of water into the solution. I added more water in intervals of 10ml gradually until I reached the desired molarity. The molarity was then 7.009e-1 so I transferred 100ml into a volumetric flask in order to fulfill the objective.

3) First I Put 20g of Na2So410H2O into a 600ml beaker. I poured about 350ml of H20 into the solution until the molarity reached 0.34M. I poured 250ml of solution into a 250ml volumetric flask, solving the problem.

4) I put 20g of Na2So410H2O into a 600ml graduated cylinder. I knew i had to have over 500ml of solution so i added 500ml of water. I then added more of the solute until the molarity measured to 0.25M. Once My solution was complete i poured 500ml of it into a 500ml beaker in order to have my finished product.