11. A mixture of magnesium bromide and magnesium sulfate is known to contain 3 mol of magnesium and 4 mol of bromide ions. How many moles of sulfate ions Are present? A 1 B 2 C 3 D 4 12. 5 g of copper is added to excess silver nitrate solution. The equation for the reaction that takes place is: After some time, the solid present is filtered off from the solution, washed with water, dried and weighed. The final mass of the solid will be A less than 5 g B 5g C 10g D more than 10 g. 13. A pupil added 0·1 mol of zinc to a solution containing 0·05 mol of silver(I) nitrate. Zn(s) + 2AgNO3(aq) Zn(NO3)2(aq) + 2Ag(s) → Which of the following statements about the experiment is correct? A 0·05 mol of zinc reacts. B 0·05 mol of silver is displaced. C Silver nitrate is in excess. D All of the zinc reacts. 14. 0·5 mol of copper(II) chloride and 0·5 mol of copper(II) sulphate are dissolved together in water and made up to 500 cm3 of solution. What is the concentration of Cu2+ B 1·0 ions in the solution in C 2·0 moll-1 D 4·0 A 0·5
11. A mixture of magnesium bromide and magnesium sulfate is known to contain 3 mol of magnesium and 4 mol of bromide ions. How many moles of sulfate ions Are present? A 1 B 2 C 3 D 4 12. 5 g of copper is added to excess silver nitrate solution. The equation for the reaction that takes place is: After some time, the solid present is filtered off from the solution, washed with water, dried and weighed. The final mass of the solid will be A less than 5 g B 5g C 10g D more than 10 g. 13. A pupil added 0·1 mol of zinc to a solution containing 0·05 mol of silver(I) nitrate. Zn(s) + 2AgNO3(aq) → Zn(NO3)2(aq) + 2Ag(s) Which of the following statements about the experiment is correct? A 0·05 mol of zinc reacts. B 0·05 mol of silver is displaced. C Silver nitrate is in excess. D All of the zinc reacts. 14. 0·5 mol of copper(II) chloride and 0·5 mol of copper(II) sulphate are dissolved together in water and made up to 500 cm3 of solution. What is the concentration of Cu2+ ions in the solution in moll-1 A 0·5 B 1·0 C 2·0 D 4·0
Unit-3-Exam-Level-Questions-1.docx