A. 4.2 cm3 B. 8.4 cm3 C. 12.6 cm3 D. 16.8 cm3 If a quantity of electricity is passed through a molten sample aluminum chloride, it is found that 0.2 moles of chlorine are formed. What is the mass of aluminum formed at the other electrode? Two electrolytic are connected in series so that the same current flows through both cells for the same length of time. The amount of tin deposited is 0.01 mol. How much copper is deposited? A. 0.005 mol B. 0.01 mol C. 0.02 mol D. 0.05 mol (a) In one experiment involving the electrolysis of molten sodium chloride, 0.1 mol of chlorine was formed. Deduce, giving a reason, the amount of sodium formed at the same time. (b) In another experiment involving the electrolysis of molten sodium chloride, the time of the electrolysis was halved and the current increased from 1 amp to 5 amp, compared to the experiment in (a). Deduce the amount of chlorine formed, showing your working. (c) If dilute aqueous sodium chloride is electrolyzed, a different product is obtained at each electrode. Identify the product formed at each electrode and an equation showing its formation. Two copper strips X and Y are placed in an aqueous solution of copper(II) sulfate and electrolyzed for a certain time. X was then dried and weighed. (i) State and explain what would happen to the mass of X. (3) (ii) State two ways in which the change in the mass of X could be increased.
A. 4.2 cm3 B. 8.4 cm3 C. 12.6 cm3 D. 16.8 cm3 If a quantity of electricity is passed through a molten sample aluminum chloride, it is found that 0.2 moles of chlorine are formed. What is the mass of aluminum formed at the other electrode? Two electrolytic are connected in series so that the same current flows through both cells for the same length of time. The amount of tin deposited is 0.01 mol. How much copper is deposited? A. 0.005 mol B. 0.01 mol C. 0.02 mol D. 0.05 mol (a) In one experiment involving the electrolysis of molten sodium chloride, 0.1 mol of chlorine was formed. Deduce, giving a reason, the amount of sodium formed at the same time. (b) In another experiment involving the electrolysis of molten sodium chloride, the time of the electrolysis was halved and the current increased from 1 amp to 5 amp, compared to the experiment in (a). Deduce the amount of chlorine formed, showing your working. (c) If dilute aqueous sodium chloride is electrolyzed, a different product is obtained at each electrode. Identify the product formed at each electrode and an equation showing its formation. Two copper strips X and Y are placed in an aqueous solution of copper(II) sulfate and electrolyzed for a certain time. X was then dried and weighed. (i) State and explain what would happen to the mass of X. (3) (ii) State two ways in which the change in the mass of X could be increased.
topic_9-19_practice_questions.docx