Potentiometric titration

An electrode with a fixed potential is

• anode

• cathode

• indicator electrode

• reference electrode

The main advantage to using a saturated KCl solution in reference electrodes is

• the low cost of KCl

• the ease at which chloride passes through the membranes

• the chloride concentration does not change as liquid evaporates from the cell

• the ease of cell construction

For indicator electrodes, which statements are true: (I) Indicator electrodes are made from relatively inert metals. (II)Indicator electrodes work best when the electrode surface is large and clean. (III) Platinum is a common indicator electrode (IV) Platinum electrodes are more inert than gold electrodes

• I, III and IV

• II and III

• I, II and IV

• I, II and III

Mercury covered by a layer of mercurous chloride in contact with saturated potassium chloride solution is a description of which of the following types of electrodes?

• sodium

• calcium

• silver/silver chloride

• calomel

In potentiometry, which of the following is considered the standard electrode?

• calcium electrode

• hydrogen electrode

• potassium electrode

• copper electrode