Question

PART A:

I) How many grams of CoI2 are there in 225 grams of an aqueous solution that is 21.0 % by weight CoI2.

II) An aqueous solution of iron(III) sulfate, Fe2(SO4)3, contains 9.24 grams of iron(III) sulfate and 17.6 grams of water. The percentage by mass of iron(III) sulfate in the solution is %.

Part B:

I) A solution was made by dissolving 2.39 g sodium chloride () in 27.9 g water (h20). What is the mole fraction of water in this solution? Mole fraction =

II) A solution was made by mixing glucose and water . Given that the mole fraction of water is 0.993 in the solution obtained from 36.5 g H2o, calculate the mass of glucose used. Mass = g

Part C:

1) An aqueous solution is made by dissolving 17.5 grams of magnesium bromide in 403 grams of water. The molality of magnesium bromide in the solution is m.

2) In the laboratory you are asked to make a 0.385 m potassium acetate solution using 375 grams of water. How many grams of potassium acetate should you add?

3) An aqueous solution is 12.0% by mass ammonia, NH3, and has a density of 0.950 g/mL. The molality of ammonia in the solution is m.

4.) An aqueous solution of potassium acetate has a concentration of 0.225 molal. The percent by mass of potassium acetate in the solution is %.

Answer 1

as per the guidelines, I have answered first four questions

Thanks and hope you like the answer