3.1 Acids and Metals

3.1 Acids and Metals

Lesson objectives;
After this lesson, you'll be able to;

Compare the reaction of different metals with dilute acids
Explain the test for hydrogen gas

Reorder

Page 86;

Zookeepers were worried. A hyena was ill. Its foot was swollen. It refused to eat. What was wrong?

Reorder the statements to explain what happened to the Hyena.

• Vets used X-rays to solve the mystery. The hyena had swallowed 2 zinc coins

• In the stomach, zinc reacted with hydrochloric acid

• The reaction made zinc chloride. Zinc chloride dissolves in water

• It mixes with blood and travels around the body

• This causes zinc poisoning

1

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5

• 1
• 2
• 3
• 4
• 5

Drag and Drop

How do other metals react with acids?

Drag and drop the correct answers to fill in the blanks.



Metals all have similar ​

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properties. They are ​

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. They ​

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​

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and ​

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. Metals have patterns in their chemical properties too.

Drag these tiles and drop them in the correct blank above

physical

shiny

conduct

heat

electricity

Multiple Select

Page 86

Emma pours dilute hydrochloric acid into a test tube. She adds magnesium ribbon.

The mixture bubbles vigorously.

Why does the mixture "bubble vigorously"?

(Select all correct answers)

• There has been a chemical reaction

• A gas has been produced.

• Hydrogen gas is produced from the reaction.

• All reactions bubble vigorously.

Dropdown

Page 86;

Anna repeats the experiment with different metals. ​

Select answer

and ​

Select answer

bubble ​

Select answer

in acid. ​

Select answer

reacts more ​

Select answer

.

Multiple Choice

Page 87; True or False;

All the reactions make a solution of a sugar, and hydrogen gas

• TRUE

• FALSE

Match

Page 87; Match the following to complete the chemical reactions of different metals with hydrochloric acid.

• zinc+ hydrochloric acid →

• iron + hydrochloric acid→

• lead + hydrochloric acid →

zinc chloride + hydrogen

iron chloride + hydrogen

lead chloride + hydrogen

• zinc chloride + hydrogen

• iron chloride + hydrogen

• lead chloride + hydrogen

Multiple Choice

Name the products in the reaction of a metal with an acid.

• A salt and an acid

• A salt and hydrogen gas

• A salt and oxygen gas

• A sugar and hydrogen gas

Reorder

Page 87;

How do you test for hydrogen?

Reorder these statements to summarize the process of testing for hydrogen gas.

• A reaction in a test tube makes bubbles.

• Collect the gas by holding an empty test tube above the reaction test tube.

• Light a splint (match)

• Hold the splint in the test tube that now contains the gas

• Listen If the splint goes out with a squeaky pop, the gas is hydrogen

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Multiple Choice

In the test for hydrogen gas, the squeaky pop happens because hydrogen and oxygen react ___.

• slowly to form water
• violently to form carbon dioxide
• explosively to form water
• calmly to form nitrogen gas

Reorder

Page 87; Reorder the following to show the correct equation for the reaction of oxygen with hydrogen.

• Hydrogen

• +

• Oxygen

• →

• Water

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• 1
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Multiple Choice

Page 87; True of False; Some metals do not react with dilute acids

• False
• True

Drag and Drop

Page 87;

Fill in the banks;

​

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happens if you add ​

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, ​

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, or ​

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to dilute ​

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acid.

Drag these tiles and drop them in the correct blank above

Nothing

gold

silver

copper

hydrochloric

Reorder

Reorder the following from most reactive (1) to least reactive (6)

According to how reactive they are with hydrochloric acid.

• Magnesium

• Zinc

• Iron

• Lead

• copper, silver

  and gold

1

2

3

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5

• 1
• 2
• 3
• 4
• 5

Dropdown

Complete the sentence below;

Some metals react with hydrochloric acid. The products are a ​

Select answer

and ​

Select answer

gas. Iron reacts more vigorously than ​

Select answer

and less vigorously than ​

Select answer

. Some metals, for example, ​

Select answer

, do not react with dilute hydrochloric acid.

Multiple Choice

Metal + Acid -> ___ + ___

• Salt + Hydrogen

• Metal Hydroxide + Hydrogen

• Metal Oxide + Hydrogen

• Metal Carbonate + Hydrogen

Multiple Choice

Sodium + Hydrochloric acid ->

• Sodium chlorine

• Sodium chlorine + hydrogen

• Sodium chloride + hydrogen

• Sodium chloride

Multiple Choice

How can you test for hydrogen gas?

• sniff it

• squeaky pop test

• add universal indicator

• add lemon water

Multiple Choice

Which of the following is the chemical name of the acid in the human stomach?

• Stomach acid

• Hydrochloric acid

• Sulphuric acid

• Gastric acid

Multiple Choice

Metals that react quickly/strongly with water and acids are called?

• Reactive
• Unreactive
• Dangerous
• Corrosive

Multiple Choice

An acid reacts with metal to produce 

• Carbon dioxide 
• Hydrogen gas
• Hydrogen gas and water 
• Salt and hydrogen gas 

Multiple Choice

Which salt will be produced if magnesium react with hydrochloric acid?

• Magnesium oxide
• Magnesium sulfate
• Magnesium sulfide
• Magnesium chloride

Multiple Select

Which of the following metals cannot react with dilute sulphuric acid?

• copper

• silver

• gold

• magnesium

Multiple Choice

Which statement is correct about all metals?

• They are attracted to a magnet.

• They are good conductors of heat and electricity.

• They react with acid.

• They react with water.

Open Ended

lithium + _____________ acid 🠚 lithium chloride + hydrogen

Multiple Select

Which of these are salts? (tick more than one

• calcium chloride

• sodium

• sodium sulfate

• nitric acid

• iron nitrate

Multiple Select

Which of these are pure metals? (tick more than one)

• zinc

• zinc chloride

• zinc oxide

• magnesium

• hydrochloric acid

Multiple Select

Which of these are acids? (tick more than one)

• sodium chloride

• nitric acid

• sodium sulfate

• lithium

• hydrochloric acid

Multiple Choice

What are the reactants for the reaction of metal with acid?
Metal + acid ---> metal salt + hydrogen

• Hydrogen
• Metal salt
• Metal
• Metal and acid

Multiple Choice

What are the products for the reaction of metal with acid?
Metal + acid ---> metal salt + hydrogen

• Metal salt and hydrogen
• Metal salt
• Metal
• Acid

Multiple Choice

Complete the following word equation:

Metal + Acid -->

• Salt + water

• Salt + hydrogen

• Salt + Water + Carbon dioxide

Multiple Choice

What is the test for Hydrogen gas?

• Squeaky pop

• Lime water turning cloudy

• Add pH paper

Multiple Choice

What does the word insoluble mean?

• Does dissolve

• Doesn't dissolve

• Is part of a solid

Multiple Choice

Salts that are made with hydrochloric acid are called ______________.

• chlorides
• sulfates
• nitrates
• carbonates

Multiple Choice

Salts that are made with sulfuric acid are called ______________.

• chlorides
• sulfates
• nitrates
• carbonates

Multiple Choice

Salts that are made with nitric acid are called ______________.

• chlorides
• sulfates
• nitrates
• carbonates

Multiple Choice

What gas is produced when a metal reacts with an acid?

• Water vapour
• Acidic gas
• Hydrogen
• Nitrogen

Multiple Choice

Which salt will be produced if magnesium react with hydrochloric acid?

• Magnesium oxide
• Magnesium sulfate
• Magnesium sulfide
• Magnesium chloride

Multiple Choice

The least reactive in oxygen in the list is 

• iron
• zinc
• copper
• lead

Multiple Choice

hydrochloric acid + cobalt →

• Cobalt chloride + Hydrogen

• Cobalt chloride + Water

• Cobalt sulphate + Hydrogen

• Copper sulphate + Water

Multiple Choice

Which of the following equation is correct when metals react with acids?

• metal + acid $$\rightarrow$$ salt + hydrogen

• metal + acid $$\rightarrow$$ metal hydroxide + hydrogen

• metal + acid $$\rightarrow$$ metal oxide + hydrogen

• metal + acid $$\rightarrow$$ metal oxide

Multiple Choice

The positive test result for hydrogen gas, H₂ is

• a lit splint; gas burns with a squeaky pop

• a glowing splint; the splint relights

• it turns lime water milky / cloudy

• none of these

Multiple Choice

What property makes copper a good metal for water pipes?

• high melting point

• good conductor of heat

• good conductor of electricity

• it is an unreactive metal

Multiple Choice

Which is the correct order of metal reactivity (most to least)?

• copper iron zinc magnesium

• magnesium iron zinc copper

• magnesium zinc iron copper

• copper zinc iron magnesium

Multiple Choice

The bubbles shown in the image are composed of which of the following?

• hydrogen

• water vapour

• carbon dioxide

• nitrogen

Multiple Choice

What is this?

• graduated cylinder

• flask

• test tube

• beaker

Multiple Choice

• beaker
• graduated cylinder
• test tube
• eyedropper

Multiple Choice

What is this?

• safety goggles

• microscope

• hand lens

• metric measuring tape