Preparation of Solutions
Chemistry ⇒ Solutions and Colloids
Preparation of Solutions starts at 9 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Preparation of Solutions.
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See sample questions for grade 11
A chemist needs to prepare 250\,\text{mL} of 0.05\,\text{M} \mathrm{AgNO_3} solution. Calculate the mass of \mathrm{AgNO_3} required. (Molar mass = 170\,\text{g/mol})
A laboratory technician needs to prepare 1\,\text{L} of 0.5\,\text{M} \mathrm{H_2SO_4} from concentrated \mathrm{H_2SO_4} (18\,\text{M}). What volume of concentrated acid is required?
A solution is prepared by dissolving 2.5\,\text{g} of NaOH (molar mass = 40\,\text{g/mol}) in water to make 500\,\text{mL} of solution. What is the molarity?
A student dissolves 5\,\text{g} of glucose (\mathrm{C_6H_{12}O_6}, molar mass = 180\,\text{g/mol}) in enough water to make 100\,\text{mL} of solution. What is the molarity of the solution?
A student needs to prepare 500\,\text{mL} of 0.2\,\text{M} \mathrm{KNO_3} solution. Calculate the mass of \mathrm{KNO_3} required. (Molar mass of \mathrm{KNO_3} = 101\,\text{g/mol})
A student wants to prepare 100 mL of 0.1 M HCl from a 1 M stock solution. What volume of stock solution should be used?
Describe the difference between a stock solution and a working solution.
Describe the importance of using a volumetric flask in solution preparation.
Describe the steps involved in preparing 250 mL of 0.1 M NaCl solution from solid NaCl.
Explain why it is important to cool a solution to room temperature before making up the final volume in a volumetric flask.
Explain why it is important to use an analytical balance when preparing standard solutions.
Explain why solutions should be mixed thoroughly after preparation.
