Section 2e

Hydrogen and water

Acids And Metals

2.26 Predict the products of reactions between dil. Hydrochloric and Sulfuric Acids;

and metals like Mg ,Zn , Al and Fe

Objectives

1 Describe the safety precautions necessary for the reaction of an acid with a metal

2 Know how to test for the gas released from the reaction of an acid with a metal

3 Predict the products of dil. Hydrochloric and Sulfuric Acids with various metals

Acids And Metals

2.26 Predict the products of reactions between dil. Hydrochloric and Sulfuric Acids;

and metals like Mg ,Zn , Al and Fe

SAFETY//////////////

Task 1 (Starter)

Fill in the hazards and precautions you should take when carrying out the reaction between an acid and a metal

SeeWorksheetFor help!

Apparatus

2.26 Predict the products of reactions between dil. Hydrochloric and Sulfuric Acids;

and metals like Mg ,Zn , Al and Fe

Pipette

BunsenBurner

MagnesiumStrips

Also :

A LitSplint

HydrochloricAcid

Observations

2.26 Predict the products of reactions between dil. Hydrochloric, Nitric and Sulfuric Acids;

and metals, metal oxides and metal carbonates. (Except Nitric Acid and Metals)

Observations

2.26 Predict the products of reactions between dil. Hydrochloric, Nitric and Sulfuric Acids;

and metals, metal oxides and metal carbonates. (Except Nitric Acid and Metals)

Hydrogen

Observations(Magnesium + Hydrochloric Acid)

What Did You See?

2.26 Predict the products of reactions between dil. Hydrochloric, Nitric and Sulfuric Acids;

and metals, metal oxides and metal carbonates. (Except Nitric Acid and Metals)

Metal Reaction With Acid

Test With Lit Splint

Gas Produced

Magnesium Bubbles of gas

released

‘Squeaky’ POP!

Hydrogen

Task 3

Objective 2.26Describe the reaction of dilute HCl and H2SO4

with

Mg

Al

Zn Fe

Experiment

Take a few pieces of the metal in the test tube

Add 5 ml of HCl to itCover the test tube with a rubber bungTest the gas with a lighted splintWrite down the observations in your copy

book.

Reactions

2.26 Predict the products of reactions between dil. Hydrochloric, Nitric and Sulfuric Acids;

and metals, metal oxides and metal carbonates. (Except Nitric Acid and Metals)

Naming Products

2.26 Predict the products of reactions between dil. Hydrochloric, Nitric and Sulfuric Acids;

and metals, metal oxides and metal carbonates. (Except Nitric Acid and Metals)

+ HydrogenSaltMetal + Acid

M + A S + H

Magnesium + Hydrochloric Acid

Magnesium Chloride + Hydrogen

Naming Other Salts

2.26 Predict the products of reactions between dil. Hydrochloric, Nitric and Sulfuric Acids;

and metals, metal oxides and metal carbonates. (Except Nitric Acid and Metals)

The 1st Part Of The Name Is From The Metal

The 2nd Part Of The NameIs From The Acid

LithiumHydrochloric Acid = Chloride

Salts

Sodium Sulfuric Acid = Sulfate Salts

Magnesium

The salts formed are : Metal Salts

Magnesium + Hydrochloric Acid

Task 4 Now try the examples on your worksheet

Magnesium Chloride

2.26 Predict the products of reactions between dil. Hydrochloric, Nitric and Sulfuric Acids;

and metals, metal oxides and metal carbonates. (Except Nitric Acid and Metals)

Check Your KnowledgeTask 4 (Plenary)

Combustion of hydrogenWord equationHydrogen + oxygen water

Chemical equationH2 + O2 H2O

Where do you think this reaction is used?

Chemical test for waterAnhydrous CuSO4 +H2O CuSO4.5H2O colourless blue

Physical test for waterMelting pointBoling point Freezing pointdensity