Chemistry Test Grade 10

Write your name First Exercise:This text is related to the first four questions :Copper (II) sulfate CuSO4 is a chemical compound that is used to control fungus on grapes, melons and other berries. In the laboratory, a student is working with the following labelled bottle of cupric sulfate (So) of % by mass = 8.33 %; Density = 3.6 g and Molar mass =250 g 1) What is the molar concentration of cupric sulfate solution (So)? 1.19 mole 0.00119 mole 0.0119 mole 2)Vo from the initial bottle of cupric sulfate solution (So) is diluted 50 times to form 0.5 liters of a new solution (S).Find the volume (Vo) to be used from (So) in order to prepare (S). 0.1ml 10ml 100ml 3) What is the molar concentration of solution (S) of cupric sulfate solution obtained after dilution? 0.238 mole 0.0238 mole 59.5 mole 4) Among the four sets below propose a suitable one for the above dilution 10 mL volumetric pipet and 500 mL volumetric flask. 10 mL graduated cylinder and 500 mL beaker. 10 mL graduated cylinder and 500 mL beaker. Second Exercise:This text is related to the questions below: A grade 10 student is preparing a fresh 500 mL of ferrous chloride solution (So) that has a mass concentration 15.24 g whose molar mass is 127 g 1) Calculate the molar concentration of this solution (So). 1.12 mole 0.12 mole 1.935 mole 2)Calculate the mass of ferrous chloride that is used for the above preparation. 71.12 g 7.62 g 7620 g It is required to prepare a solution (S1) of ferrous chloride solution starting from the above ferrous chloride solution (So). For this purpose, the student takes 15 mL of solution (So) and diluted them 5 times. 3) Calculate the concentration of the prepared solution (S1) 0.6 mole 41.66 mole 0.024 mole 4)Choose the glassware needed for the preparation for the preparation of (S1) 20 mL volumetric pipet and 75 mL beaker 20 mL graduated pipet and 75 mL volumetric flask. 20 mL graduated cylinder and 75 mL graduated flask. 200 mL of a solution (S1) of ferrous chloride solution is added to a beaker containing 100 ml of silver nitrate solution of molar concentration 0.12 mole equation of the reaction is:2AgNO3 (aq) + FeCl2 (aq) → Fe(NO3)2 (aq) + 2 AgCl(s) 5)Which one is the limiting reactant? AgNO3 FeCl2 Both reacted completely 6)What is the molar concentration of salts in the resulting solution? 0.016 mole 0.0144 mole 0.008 mole 0.0079 mole and 0.016 mole 0.016 mole 0.008 mole 7)Calculate the mass of the precipitate formed if its molar mass is 143.5 g 0.688g 1.25 g 1.377 g