A chemistry student weighs out 0.0763g of lactic acid HC3H5O3 into a 250.mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.0500M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Be sure your answer has the correct number of significant digits.

A chemist prepares a solution of potassium iodide (KI) by measuring out 180. g of potassium iodide into a 300. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's potassium iodide solution. Be sure your answer has the correct number of significant digits. mol/L x10

A chemistry student weighs out 0.0684 g of hypochlorous acid (HCIO) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1700M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Be sure your answer has the correct number of significant digits. ml. X

A solution is made by mixing 5.40 g of toluene, CH8(1), with 954. mL of chloroform, CHCI3(1). Calculate the concentration of the solute in the solution using the units given below. (Density of = 0.867 g/mL. Density of chloroform = 1.49 g/mL. Assume volumes mix additively.) toluene Enter your answers in decimal form to 3 significant figures. Do not enter units since they are already provided. Molar: molal: m mole fraction: mass percent: %(m/m) percent volume: %(v/v)