Bài Tập Pha Trộn Dung Dịch

Exercise 1: Given 6.5 grams of zinc reacts completely with 100 ml of hydrochloric acid solution. a. Calculate the volume of hydrogen gas obtained at standard conditions? b. Calculate the molarity of the salt solution obtained after the reaction? c. Calculate the molarity of the hydrochloric acid solution used?

Exercise 2: Dissolve 6 grams of magnesium oxide (MgO) in 50 ml of sulfuric acid solution (density = 1.2 g/ml) completely. a. Calculate the mass of sulfuric acid that reacted? b. Calculate the percentage concentration of the sulfuric acid solution? c. Calculate the percentage concentration of the salt solution after the reaction?

Exercise 3: Given 10.8 grams of FeO reacts completely with 100 grams of hydrochloric acid solution. a. Calculate the mass of acid used, from which deduce the percentage concentration of the acid solution? b. Calculate the percentage concentration of the salt solution obtained after the reaction?

Exercise 4: Dissolve 15.5 grams of Na2O in water to obtain 0.5 liters of solution A. a) Calculate the molarity of solution A. b) Calculate the volume of 20% sulfuric acid solution, with a density of 1.14 g/ml, needed to neutralize solution A. c) Calculate the molarity of the substance in the solution after neutralization. d) How many liters of water must be added to 2 liters of 1M NaOH solution to obtain a solution with a concentration of 0.1M?

Exercise 5: Given 100 grams of 11.2% KOH solution reacts completely with 150 grams of HCl solution. Calculate the concentration of KCl obtained after the reaction.

Exercise 6: Mix 200 ml of 2M NaHSO4 solution with 200 ml of 4M NaOH solution to obtain solution X. How much solid residue is obtained after evaporating solution X? Provide the reaction equation: NaHSO4 + NaOH → Na2SO4 + H2O.

Exercise 7: Given 100 grams of Na2CO3 solution reacts completely with 50 grams of HCl solution, producing NaCl, CO2, and H2O. Calculate the percentage concentration of the initial HCl solution, knowing that the mass of the solution after the reaction is 144.5 grams.

Exercise 8: Given 300 grams of 33.6% NaOH solution reacts completely with 450 grams of HCl solution. What is the concentration of NaCl obtained after the reaction?

Exercise 9: Given 34.8 grams of 10% K2SO4 solution reacts with 62.4 grams of 20% BaCl2 solution. After removing the precipitate, what is the percentage concentration of the obtained KCl solution?

Given 34.8 grams of 10% K2SO4 solution reacts with 62.4 grams of 20% BaCl2 solution. After removing the precipitate, what is the percentage concentration of the resulting KCl solution?