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EVALUATION

Cloze Activity

Read the paragraph below and fill in the missing words.

Electrolytic Cells

Let’s take a look at the final type of cell, the electrolytic cell. An electrolytic cell is an cell in which the energy from an external power source is used to drive a normally non-spontaneous reaction, i.e. apply a reverse voltage to a cell. We encounter electrolytic cells during the charging phase of any type of battery from the lead-acid battery in automobiles to the lithium-ion battery in smartphones.
In comparison to the galvanic cell, the of an electrolytic cell can be placed in a single compartment containing the molten or aqueous electrolyte. In addition, since the external battery source is what drives the electrons through the circuit, the electrodes will match the positive and negative terminal of the battery. While the remains the site of oxidation, it becomes the positive terminal, and the cathode becomes the negative terminal.

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DropDown Activity

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The key process of is the interchange of atoms and ions by the removal or addition of from the external circuit. The desired products of electrolysis are often in a different physical state from the and can be removed by some physical processes. For example, in the electrolysis of brine to produce hydrogen and chlorine, the products are . These gaseous products bubble from the electrolyte and are collected

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Multi-select

Question

1. Which one of the following is the substance discharged during electrolysis of molten lead bromide

Answers

(a) Oxygen

(b) Lead

(c) bromine

(d) Hydrogen

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Question

2. Aqueous sulphate contains all the following ions except?

Answers

(a) Hydrogen ions

(b) Sulphate ions

(c) Hydroxide ions

(d) sulphide ions

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