Q1: What is produced at the cathode when a solution of magnesium iodide is placed in an electrolytic cell?
a. magnesium metal
b. iodine solid
c. hydrogen gas and hydroxide ions
d. oxygen gas and hydrogen ions
Q2: How many moles of electrons have been transferred if a cell runs at (1.50x10^0) amps for (5.6000x10^0) hours? (answer to 3 SD in moles)
Note: Your answer is assumed to be reduced to the highest power possible.
Q3: If (1.50x10^0) g of a copper electrode has been deposited in a standard copper-zinc cell, how many moles of electrons have been transferred? (answer to 3 s.d. in moles)
Note: Your answer is assumed to be reduced to the highest power possible.
Q4: What is the change in mass (in grams) of the cathode if a (1.2150x10^1) A current runs for (8.55x10^0) h during the electrolysis of a solution of nickel(II) bromide? (answer to 3 S.D.)
Note: Your answer is assumed to be reduced to the highest power possible.
Q5: How long will an electrolytic cell containing a solution of silver nitrate need to run at a current of (1.0000x10^1) A to deposit (8.40x10^0) g of mass at the cathode? (answer to 3 significant digits in seconds)
Note: Your answer is assumed to be reduced to the highest power possible.
Q6: What current is required to plate (1.50x10^0) g of copper from a copper(II) nitrate solution in (5.500x10^0) hours? (answer to 3 SD in Amps)
Note: Your answer is assumed to be reduced to the highest power possible.