Stoichiometry involving concentration, calculating molarity, dilutions, and titration Problem #1 Determine the mass (in grams) for barium s...
Stoichiometry involving concentration, calculating molarity, dilutions, and titration
Problem #1 Determine the mass (in grams) for barium sulfate when barium chloride is added to 634 mL of 0.314 M sodium sulfate according to the reaction.
BaCl2 + Na2SO4 → BaSO4 + 2NaCl
Problem #2 Determine the molar concentration of 94.1 mL aqueous solution of NaOH that fully reacts with 0.737 g of oxalic acid according to the reaction.
H2C2O4 + 2NaOH → Na2C2O4 + 2H2O
Problem #3 Determine the volume (in mL) of a 0.78 M aqueous solution of barium hydroxide that fully reacts with 232 mL of 2.5 M nitric acid according to the reaction.
Ba(OH)2 + 2HNO3 → 2H2O + Ba(NO3)2
Problem #4 What is the concentration (in M) of CH3OH in a solution prepared by dissolving 9.43 g of CH3OH in sufficient water to give exactly 230 mL of solution.
Problem #5 How many grams of solute are present in a 776.1 mL of 0.63 M NaBr aqueous solution?
Problem #6 Determine the molar concentration of a solution containing 5.07 g of CoCl2 in 75.39 mL.
Problem #7 An aqueous solution contains 0.61 moles of solute corresponding to 0.084 L. If the solution contains 0.71 L of water, what is the molar concentration of this solution?
Problem #8 How many grams of H3PO4 are in 959 mL of a 4.00 M solution?
Problem #9 An aqueous solution contains 51.92 g of NaCl in 1,144 mL of water. If the density of NaCl is 2.16 g/mL, determine the molarity of this solution.
Problem #10 A stock solution has a volume of 1.57 L. This was used to prepare a dilute solution containing 53.9 g of KOH. Determine the concentration of the stock solution.
Problem #11 50 mL of a 2.7 M sucrose solution is diluted to a final concentration of 0.53 M. What is the volume of the diluted solution (in mL)?
Problem #12 Determine the volume of water (in mL) that should be added to a 100 mL of a 0.9 M solution of HCl to dilute it to a final concentration of 0.1 M.
Problem #13 You want to make 1.00 L of 0.07 M K2Cr2O7 from a more concentrated solution containing 92.8 g of K2Cr2O7 in 1.00 L. Determine how many liters of the concentrated solution should be used to make the dilute solution.
Problem #14 The titration of a 5 mL cleaning solution (density = 0.98 g/mL) containing formic acid (HCOOH) requires 20.4 mL of a 0.25 M KOH solution to reach the equivalence point. Find the concentration of the acid and the mass percentage of the acid in the cleaning solution.
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