Ionic Theory And Electrolysis Pdf

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21.05.2021 at 22:59
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ionic theory and electrolysis pdf

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Ionic theory was used to explain the behaviour of electrolytes when electric current is passed through their solution. A Swedish chemist, Swante Arrherius , was the first to present the ionic theory to describe electrolysis. The theory proposed that when an electrolyte is melted or dissolved in water, some if not all of the molecules of the substance dissociate into freely-moving charge ions i. The process of dissociation into ions is called ionization.

When an electric current is passed through an electrolyte, the free ions lose their random movement. The positive ion becomes attracted to the negative electrode called the cathode while the negative ions move toward the positive electrode called anode. It is this ionization and mobility of ions that constitute current flow. Arrhenius version of the ionic theory has been modified since the X-ray diffraction studies show that salts and strong alkalis consists of oppositely charged ions even in solid state.

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In this article, we shall study Arrhenius ionic theory, the concept of ionization and dissociation, Applying law of mass action to reactions involving ions. Electrolytes on the Basis of Ionic Theory:. According to Arrhenius ionic theory, a substance acid base or salt, which when dissolved in water splits up spontaneously into positively and negatively charged ions and the aqueous solution has electrical conductivity is called an electrolyte e. In modern theory, it is assumed that the solid electrolytes consist of two types of charged particles, one carrying a positive charge and other carrying a negative charge. They are held together by the electrostatic force of attraction. When such solid electrolytes are dissolved in a solvent, these forces weakened and electrolyte undergoes dissociation into ions. The process is also called ion solvation.


Electrolysis , process by which electric current is passed through a substance to effect a chemical change. The chemical change is one in which the substance loses or gains an electron oxidation or reduction. The process is carried out in an electrolytic cell , an apparatus consisting of positive and negative electrodes held apart and dipped into a solution containing positively and negatively charged ions.

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The theory states that electrolytes are made up of ions, which are built up in certain patterns called crystal lattice. When these substances dissolve in water, the structure is destroyed and the ions are set free to move.

Ionic Theory

Electrolysis product calculations negative cathode and positive anode products. Quantitative chemistry calculations Help for problem solving in doing electrolysis calculations, using experiment data, making predictions. Practice revision questions on quantitative calculations of electrolysis electrode products given electrode equations , mass of products at cathode or anode electrodes, moles and volumes of gases formed at the cathode and anode electrodes. This page describes and explains, with fully worked out examples, methods of calculation involving moles, masses or volumes of gases formed in an electrolysis process. You need to understand electrode equations, interconvert mass and moles and use the molar volume where gases are formed at the electrodes in electrolytic processes. Spotted any careless error? EMAIL query?

Identify the letter correct answer from the alternatives provided. D Sodium chloride solution. B They contain charged particles.

To account for the phenomena of electrolysis the Ionic Theory was put forward by Arrhenius in The theory states that electrolytes are.

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23.05.2021 at 10:50 - Reply

An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent , such as water.

Leo S.
25.05.2021 at 11:51 - Reply

Explain how ions migrate during electrolysis when an electricity is passing through copper two sulphate solution. 6. State the meaning of the following words in.

Kassia D.
26.05.2021 at 22:06 - Reply

E-mail: keith.

Anouk S.
28.05.2021 at 04:33 - Reply

Ionic theory was used to explain the behaviour of electrolytes when electric current is passed through their solution.

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