Group 2 slap Mg(OH) 2 BaCl 2 /HCl H 2 sulfates base alkali CaO steam Mg(OH) 2 BaCl 2 /HCl H 2 sulfates base alkali CaO steam magnesium + _________  magnesium.

Slides:

Advertisements

Similar presentations

Advertisements

Chemical Reactions.

When a lump of zinc is added into copper sulfate solution, the two slowly react to produce very small dark copper granules and zinc sulfate solution.

Chapter 11 Chemical Reactions

Lesson 5 Learning Objectives: Describe the test for specific negative ions Explain how precipitation reactions can be used as the test for some ions.

METAL OXIDES & HYDROXIDES.  These are mostly insoluble (can’t be dissolved in water) EXCEPT! -Those containing Sodium (Na+) -Those containing Potassium.

Making Salts Soluble salt Insoluble salt Acid + excess insoluble solid

Test for Anions. What is an anion? We will look at 1.The Chloride Ion Cl - 2.The sulfate ion SO The sulfite ion SO The carbonate ion CO.

NCEA AS S1.8 Chemical Reactions NCEA L1 Science 2012.

MAKING SALTS 27/08/2015. Making Soluble Salts There are 3 types of reaction that can be used to make soluble salts. All 3 involve: An Acid A metal or.

Double Displacement Reactions

Aqueous Solutions. Soluble and Insoluble Soluble generally means that more than 1 g of solute will dissolve in 100 mL of water at room temperature. Insoluble.

12.6 – How can we use ions in solutions?

Making Changes Topic overview. The topic can be conveniently split into six interrelated sections  Oxidation/Reduction  Salts  Preparation of gases.

Group 2 Reaction of Group 2 Oxides and Hydroxides.

Acids and bases. acids Always contain hydrogen. Always contain hydrogen. Strong or weak acids. Strong or weak acids. Common properties Sour Sour Gritty.

1. Write down everything you can remember about: 2. Do you remember any properties of an acid?

Salts By Amy Badger.

Salts L.O. State that a salt is produced when the H + ion of an acid is replaced by a metal ion or NH 4 + Describe the reactions of an acid with carbonates,

Chapter 11 Chemical Reactions 11.1 Describing Chemical Reactions 11.2 Types of Chemical Reactions 11.3 Reactions in Aqueous Solutions The objective of.

Naming Compounds, cations and anions. Elements and symbols that you should know: Part 1 – The obvious ones: 1)Hydrogen 2)Helium 3)Lithium 4)Beryllium.

Baking with bubbles L.O.:  Describe reactions of acids with metal carbonates and metal hydrogen carbonates.  Describe sodium hydrogen carbonate as baking.

Trends in chemical properties of group 2. Reactivity Group 2 are less reactive than group 1. Na vigorously reacts with water. But Ca reacts very slowly.

Soluble or Insoluble: General Solubility Guidelines Many factors affect solubility so predicting solubility is neither straightforward nor simple. The.

Displacement Reactions Words for your glossary: Single displacement Metal activity series Halogen activity series Double displacement

Chemistry 1011 Slot 51 Chemistry 1011 TOPIC Solubility Equilibrium TEXT REFERENCE Masterton and Hurley Chapter 16.1.

GROUP II CONTENTS ©HOPTON General properties

Double Displacement (or Replacement) Reactions Also referred to as metathesis reaction The two compounds exchange ions to produce two new compounds. It.

Aqueous Solutions.

Solubility Noadswood Science, 2012.

Objectives III. Reactions A. Reaction types 1. Acid-base reactions 2. Precipitation reactions 3. Oxidation-reduction reactions a. Oxidation number b. The.

Chemical Reactions A MiniPractice For Miriam. Write out and balance the correct chemical equations for the following reactions. Then write a net ionic.

Reactions in Aqueous Solution Chapter 9 Section 3.

NH 4. Ammonium +1 NH 4 PO 4 Phosphate -3 PO 4 NO 3.

GROUP 2 (ALKALI EARTH METALS) REACTIONS. How would you represent the first, second and third ionisation energies of a general metal? What does the first.

IGCSE CHEMISTRY SECTION 2 LESSON 5. Content The iGCSE Chemistry course Section 1 Principles of Chemistry Section 2 Chemistry of the Elements Section 3.

Ch 8 Single replacement reactions  A + BX  AX + B  You will have a chart of activity series  More active metals will replace less active metals from.

AS Revision Lessons Identification tests.

Acids and Bases.  Acids and bases  Dissociation of water into hydrogen and hydroxide ions.  pH is related to the concentration of hydrogen and hydroxide.

Core Chemistry Smart Teach 3: Acids and electrolysis.

Balanced Chemical Equations: Represent reactants, products, and their amounts Make use of chemical formulas i.e. H 2 O can not be altered as they represent.

CHEMICAL REACTIONS - Ch.8 Describing Chemical Change Reactants  Products Bonds are broken and new bonds are formed No atoms are created or destroyed Catalyst-

GCSE 1.2 – Limestone Cycle Limestone Cycle!!!.

 A process by which one or more substances are changed into one or more different substances. Reactants  Products.

Atoms of different elements combine to form compounds by the formation of new chemical bonds Describe how the transfer of electrons produces cations and.

Starter Quiz What ions are produced by acids and alkalis?

Chemical Changes and Structure

Precipitate Testing.

Solubility Rules and Precipitation Reactions

Q: How do atoms of different elements combine to form compounds?

Learning objective: To be able to identify chemical species from their characteristic behaviour 22/05/2018 Anions Sulfate (SO42-): Add dilute hydrochloric.

Tests for Oxidising / Reducing Agents

Acids and Alkalis Grade 10.

Mini test – write the formulae for

6. Chemical Equations + Tests for Anions

Sulphate Anion Tests.

Learning objective: WALT:

1 Salts V2.0 Unit 11 (Pg 138).

Group 1 and 2 Nitrates And Carbonates.

Testing for ions and gases

8.3 Preparation of salts Demonstrate knowledge and understanding of preparation, separation and purification of salts as examples of some of the techniques.

Writing Equations Saturday, 24 November 2018.

TYPES OF CHEMICAL REACTIONS

MAKING SALTS 21/06/2019.

Title: Acids and bases Complete the activities listed below

Presentation transcript:

Group 2 slap Mg(OH) 2 BaCl 2 /HCl H 2 sulfates base alkali CaO steam Mg(OH) 2 BaCl 2 /HCl H 2 sulfates base alkali CaO steam magnesium + _________  magnesium oxide + hydrogen Less soulble down group 2 Doesn’t neutralise sulfuric acidNeutralises acid OH - Thick white precipitate demonstrates presence of sulfate ion Formed when barium reacts with water Insoluble in water; neutralises acid

Thermal stability experiments Stability of carbonates (MCO 3 ) –Spatula of group 2 carbonate in a test tube –Clamp tube at a slight angle –Delivery tube into a tube containing about 1 cm depth limewater –Heat solid strongly –Take care when heating stops – remove limewater Stability of nitrates (M(NO 3 ) 2 ) –Spatula of group 2 nitrate in a test tube –IN FUME CUPBOARD: heat strongly –Test gases with glowing splint and starch/iodide paper

Thermal Stability Thermal stability increases down groups Anions decompose because of polarisation by cations High charge density (on cation) = unstable compound Mg 2+ Ba 2+

Thermal Stability Carbonates Group 1 (except Li) stable Group 2 (& Li) decompose on heating: CaCO 3  CaO + CO 2 ; Li 2 CO 3  Li 2 O + CO 2 (BaCO 3 is pretty stable – big ion = low charge density) Nitrates Group 1 (except Li) 2 NaNO 3  2 NaNO 2 + O 2 Group 2 (& Li) 2 Ca(NO 3 ) 2  2 CaO + 4 NO 2 + O 2 4 LiNO 3  2 Li 2 O + 4 NO 2 + O 2 Why do the lithium compounds behave as if lithium is in group 2?