A student dissolves 17. g of sucrose (C,H„01) in 250. mL of a solvent with a density of 1.04 g/mL. The student notices that the volume of the solvent does not change when the sucrose dissolves in it. Calculate the molarity and molality of the student's solution. Be sure each of your answer entries has the correct number of significant digits. molarity Ox10 ロ×ロ molality ロロ ロ

Suppose 2.50 g of lead(II) acetate is dissolved in 300. mL of a 35.0 m M aqueous solution of ammonium sulfate. Calculate the final molarity of lead(II) cation in the solution. You can assume the volume of the solution doesn't change when the lead (II) acetate is dissolved in it. Be sure your answer has the correct number of significant digits. M x10 X Ś

If 0.42 mg calcium fluoride, CaF2 is used as above to add fuoride to the drinking water, doesCaFz add more fluoride than 0.42 g of NaF in the 250 mL glass of water? Justify your answer.

A chemist adds 430.0mL of a 9.76 M silver perchlorate AgClO4 solution to a reaction flask. Calculate the millimoles of silver perchlorate the chemist has added to the flask. Be sure your answer has the correct number of significant digits.

A chemistry student weighs out 0.146 g of lactic acid (HC,H,O3) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1800M NAOH solution. olo Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits. Ar mL x10

A chemist prepares a solution of iron II bromide   FeBr2   by measuring out 17.mg of FeBr2 into a 50.mL volumetric flask and filling to the mark with distilled water.   Calculate the molarity of Br− anions in the chemist's solution.   Be sure your answer is rounded to the correct number of significant digits.

Using mass concentration to find solute mass and solution volume.

5.00 g of solid Al(NO3)3 was added to enough water to make a solution with a total volume of 100.0 mL.  Al(NO3)3 is very soluble in water and this much solid will fully dissolve in a 100.0 mL solution.  If 65 mL of water was added to the original 100.0 mL Al(NO3)3 solution described to the left in order to dilute the solution.  Calculate the new diluted solution concentration, in Molarity? Assume the volumes of the 2 solutions are additive.

μmol L A chemist must prepare 125. mL of 31.0 µM aqueous mercury(II) iodide (HgI₂) working solution. He'll do this by pouring out some 87.5 aqueous mercury(II) iodide stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in mL of the mercury(II) iodide stock solution that the chemist should pour out. Be sure your answer has the correct number of significant digits. X

What mass in grams (g) of C12H22O11 (sucrose) (MM=342.30 g/mol ) is needed to prepare 227.5 mL of a 0.171 M solution of sucrose in water? Give your answer rounded to two decimal places