Sulphate Anion Tests.

Slides:

Advertisements

Similar presentations

Balancing Chemical Equations

Advertisements

Predicting the Products of Double Replacement Reactions

TYPES OF CHEMICAL REACTIONS, CONTINUED. AB + CD AD + CB DOUBLE REPLACEMENT Ions in two compounds change partners Cation of one compound combines with.

Tests for cations in solution

Chapter 8 Chemical reactions

Qualitative Analysis Chemistry. What is qualitative analysis Qualitative analysis is used to determine the chemical composition of an unknown substance.

Alkaline permanganate and hydrogen sulfite

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

Solubility Equilibrium

Precipitate Reactions L.O. I can state which are spectator ions in a precipitation reaction. I can make a clean dry precipitate and write the ionic equation.

Unit 3 – Chemical Reactions.  In many ionic reactions, not all of the chemical species undergo a change.  Those that do not change are called spectator.

Notes on Total and Net Ionic Equations. Ionic Compounds (Metal and Nonmetal) (Cation and Anion) If soluble these compounds will DISSOLVE and DISSOCIATE.

Net Ionic Equations.

Tests for anions in solution. Anions are negative ions. The anions you need to be able to identify are: carbonate, CO 3 2–carbonate, CO 3 2– hydroxide,

The common ion effect. Saturated sodium chloride solution contains solid NaCl in equilibrium with the aqueous ions: NaCl(s) Na + (aq) + Cl – (aq) We know.

Topic 9 Reactions of Acids.

C4 Lesson 16 – Testing Water. After studying this topic, you should be able to: recall the tests for sulfate ions and halide ions in water write word.

Salt soluble? yes, then choose an acid and a base base soluble? yestitrationno excess base no precipitation choose two soluble salts.

Ions In Solution.

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.

Lesson  We used sodium hydroxide and ammonia to identify positive ions.  We can carry out test to identify negative ions.  Negative ions are.

 All chemical reactions have two parts: Reactants and Products.

Group 2 Reaction of Group 2 Oxides and Hydroxides.

Ms Stephens Carry out procedures to identify ions present in solution Qualitative – definitions of solubility Solubility rules Identifying ions Balancing.

Identifying ions present in solution. A colourless solution is analysed to determine the cation and anion present. To separate samples of this solution.

Mixing Aqueous ionic compounds… Na + Cl - Na + Cl - NaCl (aq) NaCl (s)

Balancing chemical equations. WRITING CHEMICAL EQUATIONS Chemical equations should show : (a) formulas of the reactants & products (b) their states of.

 DO NOW:  1. Watch the following video  2. Write your observations  3. Predict the products of AgNO 3 and NaCl.

Say we start with a strong alkali containing Universal indicator, and gradually add acid The alkali will gradually get.

Salts By Amy Badger.

C5 lesson 4. Learning objective: To understand how unknown compounds can be identified. Must: Explain what a precipitate is – E Should: Be able to use.

Types of Reactions. In Chemistry, we can identify a lot of different types of chemical reactions. We can put these chemical reactions into groups, so.

2 Word Equations. Phase Symbols Are subscripts that indicate the phase of the chemical.

What does soluble and insoluble mean?

Water: removing dissolved solutes Chapter 12. Precipitation Reactions When two solutions are mixed, an insoluble compound sometimes forms. When two solutions.

Group 2 Elements & Compounds

Precipitation Reactions

Unit 7 Reactions in Solution Upon completion of this unit, you should be able to do the following: Describe the driving forces for a chemical reaction.

Solubility Noadswood Science, 2012.

Reactions in Aqueous Solution Chapter 9 Section 3.

Precipitation Reactions (Reactions that form a precipitate)

Review of Science 10 Dissociation and Word Equations.

Precipitation Reactions

Precipitate Testing.

Identifying Halides.

Non-metal Ions Negative Ions

Tests for Oxidising / Reducing Agents

Mini test – write the formulae for

6. Chemical Equations + Tests for Anions

Halide Anion Tests.

Topic 1 – Qualitative testing.

Learning objective: WALT:

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

Qualitative Analysis Qualitative – definitions of solubility

12.6 – How can we use ions in solutions?

Qualitative Analysis Reactions that produce an INSOLUBLE SALT.

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

Chemical Reactions.

Tests for Ions Sunday, 11 November 2018

Writing Equations Saturday, 24 November 2018.

Chemical Analysis.

Chemsheets AS006 (Electron arrangement)

Barium chloride reacts with sulfuric acid to produce barium sulfate and hydrochloric acid. If 98.2g of hydrochloric acid is needed how much barium chloride.

Name: Nissana Khan Class: L6 Module 2- Kinetics and Equilibria

C4 – Chemical changes Key Concepts.

PRACTICAL METHODS FOR MAKING SALTS: Learn THIS!

PRACTICAL METHODS FOR MAKING SALTS: Learn THIS!

Presentation transcript:

Sulphate Anion Tests

What are we testing to find? This test is to confirm the presence of sulphate ions. Sulphate ions are negatively charged (SO42-) therefore they are anions.

How do we do the test? Place the sample solution in a test tube. First add a few drops of hydrochloric acid using the dropper. Then add barium chloride solution to the sample, using a dropper. Observe if any precipitate is formed.

What results might we get? If sulphate anions (SO42-) were present in the sample then we will observe a white precipitate. This can be represented by an equation, here with the example of copper sulphate CuSO4 (aq) + BaCl2 (aq) → CuCl2 (aq) + BaSO4 (s) The copper and chloride ions can be removed from the equation and we can write this as an ionic equation, where only the reacting ions are used SO42- (aq) + Ba2+ (aq) → BaSO4 (s)

Why does this test work? Most sulphate salts are insoluble. One notable exception is barium sulphate, which is a white solid. If we add barium chloride solution, which we know to be soluble to a sulphate, then the barium ions and the sulphate ions will form the insoluble salt, which precipitates.

Watch this video to see the test in action https://www.youtube.com/watch?v=kYApk6lwaoI

Summary We can test for the presence of sulphate anions by adding barium chloride in the presence of hydrochloric acid to the sample, and if we will see a white precipitate formed the presence of sulphate ions is confirmed.