6.1 Electrolysis 14 October 2015 H He Li Na K Be ScTi Mg VCrMnFeCoNiCuZnGaGeSeBrCaKr AlP NO SCl FNe ArSi BC As Mg C Cl K 12 345670 What are the missing.

Slides:

Advertisements

Similar presentations

Conductivity A Conductor is a substance that allows electricity to pass through it. An Insulator is a substance that will not allow electricity to pass.

Advertisements

contents Electrolysis of molten compounds Electrolysis of solutions

BatteriesBatteries How Batteries Work. Three Main Components of Batteries Negative terminal (anode): an electrode made of a metal such as zinc that accumulates.

Starter 1. Explain why molten sodium chloride conducts electricity but solid sodium chloride does not. 2. Explain why although neither lithium chloride.

Starter 1. What types of elements are present in covalent compounds? 2. What can be said about the conductivity of covalent compounds? 3. What types of.

Electrolysis Of Brine Noadswood Science, 2012.

Let’s read! Pages 82 to 89. Objectives To know how to carry out electrolysis experiments. To work out what happens to ions at each electrode. To be able.

Electrolysis Electrolysis breaks down ionic substances into simpler substances by using electricity!

Chemistry C Atomic Structure

Electrolysis project Electrode: Is an electrical conductor that is used to pass current through an electrolyte.

1 Chapter 4 Compounds and Their Bonds 4.2 Ionic Compounds Copyright © 2009 by Pearson Education, Inc.

By Alex, Matt, Kit and Katie

KNOCKHARDY PUBLISHING

Electrolysis (I) LQ: What happens at the electrodes?

Electrolysis ‘splitting up compounds using electricity’

DAILY QUESTIONS Circle the oxidized element, underline the reduced element. 2Sr +O 2  2SrO Fe +2 +O 2  FeO Define what happens to elements that are oxidized.

Ionic Bonding Structure and properties of ionic substances.

Introduction to Ionic Compounds. Many ions have a noble gas configuration Ions with a noble gas configuration are stable.

Chemical Names and Formulas Molecules and Molecular Compounds 1.Molecule- the smallest electrically neutral unit of a substance that still has the properties.

H Li Na K Rb Cs Fr Be ScTi Mg VCrMnFeCoNiCuZnGaGeSeBrCaKr YZrNbMoTcRuPdAgCdInSnSbSrTeRh BaHfTaWReOsIrAuHgTlPbBiPoLaAtPt RaRfDbSgBhHsMt??Ac? AlP NO SCl.

Electrolysis Electrolysis of Water.

12.6 – How can we use ions in solutions?

Explain the process of electrolysis and its uses

Ionic Bonds Forming Salt. How many elements are there? ~118 elements are listed on the periodic table. So does this mean there are only 118 different.

Ionic and Covalent Bonds. Two or more elements chemically combined. Compound.

Electrolysis Process by which an electric current is passed through a substance to cause a chemical change. The chemical change is one in which the substance.

Electricity in Chemistry An electric current is a flow of charge – this can be either electrons or charged particles called “ions” A conductor is a substance.

CHEMICAL BONDS. CHEMICAL BONDING I Constructing Molecular Models What limited the number of “atoms” you could connect? Black – 4, Red – 2, White - 1.

Splitting up ionic compounds (F) Molten compounds

1. Neutron A. The number of protons in an atom. 2. Proton B. Hold the electrons around the nucleus. 3. Electron C. The number of protons plus neutrons.

GALVANIC AND ELECTROLYTIC CELLS

6.4 Purifying Copper How many uses can you name for copper? 23 October 2015.

Electrolysis Decide on the answer(s) then click and a rectangle will surround the correct answer(s).

Chemical effect of electric current How things work.

1.  Chemists believe that many chemical compounds contain ions  Common Properties of these compounds: ◦ High melting point (ex: salt melt at 800*C)

Moving positive charges Ions moving in an electrolyte Electrolysis of Copper Chloride (CuCl 2 )

Electrolysis Noadswood Science, 2012.

Chapter 16.  the chemical principles, half-equations and overall equations of simple electrolytic cells; comparison of electrolytic cells using molten.

Electrolysis of Copper Chloride Solution. What is a solution?

Extracting metals. Methods of extracting metals The Earth's crust contains metals and metal compounds such as gold, iron oxide and aluminium oxide, but.

Electrolytic Cells Section 9.2. Vocabulary Electrolysis: electrical energy used to bring about a non-spontaneous redox reaction Electrolyte: any substance.

Bonding Why do atoms bond? The octet rule – all atoms bond so they have 8 electrons in their outer shell, so that it is FULL.

Conductors and non-conductors Conductors are materials that conduct electricity. Non-conductors or insulators are materials that do not conduct electricity.

Electrolysis. What is electrolysis? Electrolysis means “breaking up a compound with electricity” From the Greek Electro – electricity Lysis – breaking.

What is the bonding in sodium chloride like?

IGCSE CHEMISTRY LESSON 4. Section 1 Principles of Chemistry a)States of matter b)Atoms c)Atomic structure d)Relative formula mass e)Chemical formulae.

ELECTROLYSIS BONDING, STRUCTURE & PROPERTIES. After completing this topic you should be able to : BONDING, STRUCTURE & PROPERTIES ELECTROLYSIS Explain.

BONDING. WHY ATOMS COMBINE -1 All atoms want a full outer shell Some atoms will lose electrons to empty their shells These become positively charged ions.

IONIC BONDING. HOW DOES IT WORK? Ionic bonding takes place between metals and non-metals Metal atoms try to attain noble gas strucure (full outer shells)

Ionic substances C2.1/2 10-Jul-11. Metal + Non-metal Metal atoms Non-metal atoms + ions– ions electrons Ionic compound Atoms get full outer shells.

S2 Science Ions and Ionic Bonding.

Starter Under what conditions do ionic compounds conduct electricity?

The way things are joined together

12.6 – How can we use ions in solutions?

Topic 3 revision: Electrolytic Processes

C3.4 – Electrolysis and cells

Impure copper is purified by electrolysis using the apparatus shown.

How Elements Form Compounds

An electrolytic cell uses electricity to do a chemical reaction.

C6.2 Changes at the electrodes

Chemical Bonds.

Title: Electrolysis Complete the activities listed below

Presentation transcript:

6.1 Electrolysis 14 October 2015 H He Li Na K Be ScTi Mg VCrMnFeCoNiCuZnGaGeSeBrCaKr AlP NO SCl FNe ArSi BC As Mg C Cl K What are the missing values? Use the table. Na Ion Charge Outer electrons NeBrOAlKCaClNLi Symbol Remember: Ions are charged atoms. 8 is the magic number of electrons in the second and third shells.

6.1 Electrolysis Ionic compounds can undergo electrolysis. Which substances can be electrolysed? The products of electrolysis. 14 October 2015 Key words Electrolysiselectrolyteions Anodecathodeinert Electroplating uses electricity to cover objects in metal. This can be any metal but is normally copper, silver or gold.

Ionic compounds Ionic compounds are made from charged ions e.g. Sodium Chloride. Na + Cl - The ions can move in solution or when the substance is melted (molten).

Electrolysis of Copper Sulfate Copper sulfate is an ionic substance. Copper forms positive ions, sulfate forms negative ions. Opposites attract. + - AnodeCathode Cu 2+ SO 4 What charge does the sulfate have?

Electrolysis of copper chloride Write the captions for every slide to explain what is happening.

NegativePositive + – One electrode is negative, the other is positive.

The negative electrode is called the cathode, the positive electrode is called the anode. CathodeAnode + –

Copper chloride is added to the electrolytic cell. Copper chloride + –

Copper chloride has the formula CuCl 2. + – CuCl 2

Copper chloride solution CuCl 2 Copper chloride solution is bright blue in colour. CathodeAnode + –

Cu 2+ Cl - It is made of a copper ion with a 2+ charge, and two chlorine ions with a charge of 1– on each. CathodeAnode + –

Cu Cl - The copper ion is attracted to the cathode, where it gains two electrons and becomes a copper atom. CathodeAnode + –

Cu Cl The chlorine ions are attracted to the anode, where they lose an electron each and become chlorine atoms and then chlorine molecules. CathodeAnode + –

The products of electrolysis What is produced on the electrodes? –Metal forms on the cathode (-) –Sulfate forms on the anode (+)

6.1 Electrolysis Electrolysis involves splitting up a substance using electricity. Ionic substances can be electrolysed when they are molten or in solution. In electrolysis positive ions move to the negative electrode (cathode) and negative ions move to the positive electrode (anode). 14 October 2015 Key words Electrolysiselectrolyteions Anodecathodeinert