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Yellowblue. Neutralization of Acids and Bases Titration Curve of a Neutralisation Reaction pH of Acid solution starts off very low  SA Base is being.

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Presentation on theme: "Yellowblue. Neutralization of Acids and Bases Titration Curve of a Neutralisation Reaction pH of Acid solution starts off very low  SA Base is being."— Presentation transcript:

1 yellowblue

2

3 Neutralization of Acids and Bases

4 Titration Curve of a Neutralisation Reaction pH of Acid solution starts off very low  SA Base is being added; pH rises

5 Introduction to Acids & Bases ACIDBASE Definition pH Taste Feel Electrical Conductivity Litmus Test General Sources

6 Definitions Acids: Eg. HCl (g)  H + (aq) + Cl - (aq) A substance when in solution produces hydronium ions (H 3 O + ); proton DONOR

7 Acids Bases Bases:

8 Definitions Bases: Proton ACCEPTOR A substance which contains a hydroxide ion (OH - ) or oxide (O 2- ) A substance when in solution produces hydroxide ions (OH - )

9 Introduction to Acids & Bases ACIDBASE pH < 7>7 Taste Sourbitter Feel Burn skinslippery Electrical Conductivity Conductive (H 3 0 + ions)Conductive (OH - ) Litmus Test REDBLUE General Sources FoodsCleaners

10 Acid – Base Reactions Neutralisation Reaction occurs when acids and bases react to form ionic salts ACID + BASE  WATER + SALT HCl (aq) + NaOH (aq)  H 2 SO 4 (aq) + K 2 O (aq)  HBr (aq) + NH 3 (aq) 

11 Acid or Base? a) ClO 2......___________f) CO 2...... ___________ b) SrO......___________g) Cs 2 O... ___________ c) Cr 2 O 3...___________h) BaO..... __________ d) SeO 2....___________i) SO 3...... ___________ e) NO 2.....___________j) Ag 2 O..... ___________ What do these molecules all have in common??

12 Acids Bases Which of those compounds would produce oxide ions??

13 Basic Oxides Are “metal” oxides – Eg. Na 2 O, K 2 O, MgO, CaO, Fe 2 O 3, A g2 O….. They all dissociate to produce O 2- ions which acts as a STRONG BASE Eg. Step 1: K 2 O  K + + O 2- Step 2: O 2- + H 2 O  2OH -

14 Common oxides

15 Acidic Oxides “Non-metal” oxides eg. CO 2, NO 2, P 2 O 3, SO 3…. Remains covalently bonded to oxygen Chemically combines with water to form an acidic solution eg. SO 2 (g) + H 2 O  H 2 SO 4 Eg. SO 2

16 Acid Rain = non-metal oxides

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18 Amphoteric Oxides Certain metals and metalloid oxides can act as either an acid or a base: Eg. Al 2 O 3 + 6HCl → 2AlCl 3 + 3H 2 O Base Acid Al 2 O 3 + 2NaOH → Na 2 Al 2 O 4 + H 2 O Acid Base


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