1) What is the percentage strenght of a solution prepared by dissolving 60 g of potassium chloride in 150 ml of water?
2) If 150 ml of 20% w/v chlorobutanol are diluted to 5 gallons, what will be the percentage strength of the dilution?
3) How many milliliters of water should be added to 200 ml of a 1:125 w/v solution to make a solution such that 50ml diluted to 100ml will provide a 1:4000 dilution?