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Using the reactivity Using the reactivity seriesseries

TP - WALT Demonstrate TP - WALT Demonstrate the R.S. Using Water, the R.S. Using Water, oxygen and acidoxygen and acid

20/04/23Reactions of metals with Reactions of metals with oxygenoxygen

When a metal reacts with oxygen it will form a METAL OXIDE. This is what happens when a metal rusts. We can make this reaction happen quicker by burning the metal.

METAL + OXYGEN METAL OXIDE

Copy and complete the following reactions:

1) Magnesium + oxygen

2) Copper + oxygen

3) Calcium + oxygen

4) Iron + oxygen

20/04/23Reactions of metals with Reactions of metals with waterwater

When a metal reacts with water hydrogen is always given off. The other product will be either a metal hydroxide or a metal oxide.

Copy and complete the following reactions:

1) Sodium + water

2) Potassium + water

3) Calcium + water

4) Iron + steam

METAL + WATER METAL OXIDE + HYDROGEN

METAL + WATER METAL HYDROXIDE + HYDROGEN

20/04/23Reactions of metals with Reactions of metals with acidsacids

When a metal reacts with an acid it gives off hydrogen (which can be “popped” using a lit splint). The other product is a salt.

Copy and complete the following reactions:

1) Calcium + hydrochloric acid

2) Zinc + hydrochloric acid

3) Iron + hydrochloric acid

4) Lithium + sulphuric acid

METAL + ACID SALT + HYDROGEN

e.g. magnesium + hydrochloric acid magnesium chloride + hydrogen

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Complete the following reactions:Complete the following reactions:

1) Lithium + water

2) Lithium + hydrochloric acid

3) Silver + oxygen

4) Magnesium + sulphuric acid

5) Potassium + oxygen

6) Aluminium + oxygen

7) Manganese + water

8) Sodium + sulphuric acid

9) Lithium + oxygen

10)Nickel + hydrochloric acid

Lithium hydroxide + hydrogen

Lithium chloride + hydrogen

Silver oxide

Magnesium sulphate + hydrogen

Potassium oxide

Aluminium oxide

Manganese oxide + hydrogen

Sodium sulphate + hydrogen

Lithium oxide

Nickel chloride + hydrogen

20/04/23An example question on An example question on reactivityreactivity

Metal Reaction with dilute

acid

Reaction with water

Reaction with

oxygen

ASome reaction Slow reaction Burns

brightly

B No reaction No reaction Reacts slowly

C No reaction No reaction No reaction

DViolent reaction

Slow reaction Burns brightly

EReasonable reaction

Reacts with steam only

Reacts slowly

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The Reactivity SeriesThe Reactivity Series

The Reactivity Series lists metals in order of reactivity:

Potassium

Sodium

Calcium

Magnesium

Aluminium

Carbon

Zinc

Iron

Lead

Copper

Silver

Gold

Measuring the reactivity of Measuring the reactivity of metals and acidmetals and acid

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TP – WALT Display the increasing reactivity of metals using acid and measuring temperature

WILF – Complete expt Questions answered

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• When metals are placed in acid, a salt and hydrogen are produced

• When they react, energy is also released in the form of heat

• The more reactive the metal, the more heat is released during the reaction

ApparatusApparatus20/04/23

Various metals (Magnesium, Copper, lead, iron and calcium)Hdrochloric AcidTest tubes/ Test tube rackThermometer

MethodMethod20/04/23

1)Measure 10 mls Hydrolchloric Acid2)Take the temperature3)Take a small piece of metal4)Add metal to the acid5)Wait until the reaction has

finished6)Take the temperature again and

calculate the difference

Measuring the reactivity of metals and Measuring the reactivity of metals and acidacid

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Metal Temperature Before (C)

Temperature After (C)

Temperature Difference (C)

Iron

Magnesium

Copper

Calcium

Lead

Questions, QuestionsQuestions, Questions20/04/23

1)Place your metals in order of releasing heat, with those that released the most at the top

2)How does this compare to your reactivity series that you have in your books

3)For each of the reactions, write a word equation

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