Pls I am new here can anyone put me through

<h2 class="title">Electrochemical Reactions: Introduction</h2>
<p>We use batteries throughout our day-to-day lives. Cell phones use lithium-ion batteries, cars use lead-acid batteries (see (a) part of the figure below), while silver-oxide batteries (see (b) part of the figure below) are used in watches. Some batteries are rechargeable (see (c) part of the figure below), while others cannot be recharged and have to be thrown away.</p>
<div class="wp-caption alignnone" style="width: 800px"><img alt="" height="227" src="https://data.ulearngo.com/assets/583ab67a-322b-428e-a719-0e0f02833d7c" width="800"/><p class="wp-caption-text">a) A car battery, b) watch batteries and c) rechargeable AA batteries.</p></div>
<p>A battery consists of multiple <strong>electrochemical cells</strong>. And within each <a data-lesson="the-nernst-equation" data-subject="chemistry" data-tutorial="electrochemistry" href="https://app.ulearngo.com/chemistry/electrochemistry/the-nernst-equation">cell</a> there are <strong>electrochemical reactions</strong> taking place. This can be seen in the <em>lemon battery</em> experiment shown in the figure below. Each lemon is a cell in the battery, which consists of three lemon cells. The reactions the copper and zinc undergo in the lemons are electrochemical reactions, and a current is produced.</p>
<div class="wp-caption alignnone" style="width: 800px"><img alt="" height="292" src="https://data.ulearngo.com/assets/8b694052-a5cc-4bc6-b3c0-c096fd273f85" width="800"/><p class="wp-caption-text">A current is produced by connecting lemons with zinc and copper metal. The reactions taking place here are electrochemical reactions.</p></div>
<p>Electrochemical reactions, and electrochemical cells are covered in this tutorial. Before going into any more detail however, it is important to revise <a data-lesson="stoichiometry-of-redox-reactions" data-subject="chemistry" data-tutorial="chemical-reactions-stoichiometry" href="https://app.ulearngo.com/chemistry/chemical-reactions-stoichiometry/stoichiometry-of-redox-reactions">oxidation</a> and reduction, as well as <a data-lesson="redox-reactions" data-subject="chemistry" data-tutorial="reactions-in-aqueous-solution" href="https://app.ulearngo.com/chemistry/reactions-in-aqueous-solution/redox-reactions">redox reactions</a> and how to balance them, as these concepts are very important in electrochemistry.</p>

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Introducing Electrochemical Reactions

Chemistry generally explores the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances. 

Chemistry

Discover the principles and applications of electrochemical reactions as you explore topics ranging from oxidation and reduction, balancing redox reactions and half-reactions, and predicting current and rate of reaction to understanding the standard hydrogen electrode and practical applications like electrolysis, electroplating, and aluminium extraction.


Introducing Electrochemical Reactions

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