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Reactions of Acids - Metal Carbonates

In this worksheet, students will consider the reactions of acids andconcentrate on how they react with metal carbonates.

'Reactions of Acids - Metal Carbonates' worksheet

Key stage:  KS 3

Curriculum topic:   Chemistry: Chemical Reactions

Curriculum subtopic:   Reactions of Acids with Metals

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

Acids react with metal carbonates such as calcium carbonate to produce a salt, water and carbon dioxide. This reaction can be shown in a word equation:

 

acid + metal carbonate  salt + water + carbon dioxide

 

Calcium carbonate is found in rocks such as limestone, chalk and marble. These substances have been used for many years to make buildings and statues. For example, shown here is a picture of the Leshan Giant Buddah in China that was carved from limestone rock over one thousand years ago.

 

Limestone Buddah

 

The statue is slowly being damaged by ACID RAIN. The acidic rain is reacting with the limestone it is made from, slowly eroding the statue.

 

This reaction can be shown in the lab. If a small piece of calcium carbonate (remember, limestone is mainly calcium carbonate) is added to hydrochloric acid it begins to fizz because of the carbon dioxide gas being produced. The piece of calcium carbonate will become smaller until there is no more left and the reaction will stop.

 

The carbon dioxide gas produced can be identified using a substance called LIMEWATER. Limewater becomes cloudy white in the presence of carbon dioxide gas.

This reaction occurs when any metal carbonate is added to an acid.

 

Calcium Carbonate, along with some other carbonates, is also added to indigestion remedies to neutralise stomach acid.

Which of the following would react with hydrochloric acid to produce carbon dioxide gas?

Sodium carbonate

Sodium chloride

Sodium hydroxide

Which of the following would react with hydrochloric acid to produce carbon dioxide gas?

iron metal

marble

wood

Using the table below, decide which of the substances would react with an acid to produce carbon dioxide gas.

 Carbon dioxide producedNo carbon doxide produced
Wood
Copper
Limestone
Marble
Ice
Chalk
Glass
Copper carbonate
Iron

What is the name of the substance that can be used to detect carbon dioxide gas?

hard water

pure water

limewater

What effect does carbon dioxide gas have on limewater?

turns green

increases its temperature

turns cloudy white

What pollution problem contributes to the erosion of limestone buildings?

acid rain

global warming

noise

Indigestion can be caused by an excess of stomach acid.

 

Stomach ache

 

Which of the following substances might you expect to find in the ingredients list of an indigestion remedy?

 Found in Idigestion RemediesNot found in Indigestion Remedies
Calcium carbonate
Vinegar
Lemon juice
Sodium carbonate
Citric acid
Magnesium carbonate
  • Question 1

Which of the following would react with hydrochloric acid to produce carbon dioxide gas?

CORRECT ANSWER
Sodium carbonate
EDDIE SAYS
All metal carbonates react with acids to produce carbon dioxide gas.
  • Question 2

Which of the following would react with hydrochloric acid to produce carbon dioxide gas?

CORRECT ANSWER
marble
EDDIE SAYS
Limestone, chalk and marble all contain calcium carbonate which reacts with acids to produce carbon dioxide gas.
  • Question 3

Using the table below, decide which of the substances would react with an acid to produce carbon dioxide gas.

CORRECT ANSWER
 Carbon dioxide producedNo carbon doxide produced
Wood
Copper
Limestone
Marble
Ice
Chalk
Glass
Copper carbonate
Iron
EDDIE SAYS
All carbonates react to produce carbon dioxide gas. Metals can also react with acids but they produce hydrogen gas not carbon dioxide.
  • Question 4

What is the name of the substance that can be used to detect carbon dioxide gas?

CORRECT ANSWER
limewater
EDDIE SAYS
Limewater turns from colourless to cloudy white in the presence of carbon dioxide. This cloudiness is caused by particles of chalk being produced by the reaction of the CO2 with the limewater.
  • Question 5

What effect does carbon dioxide gas have on limewater?

CORRECT ANSWER
turns cloudy white
EDDIE SAYS
The colour change can also be described as: colourless to milky white or just colourless to white.
  • Question 6

What pollution problem contributes to the erosion of limestone buildings?

CORRECT ANSWER
acid rain
EDDIE SAYS
Acid rain slowly wears away the limestone due to the acids it contains. The acids in the rain react with the calcium carbonate in the limestone to turn it to soluble calcium salts and release CO2 into the atmosphere.
  • Question 7

Indigestion can be caused by an excess of stomach acid.

 

Stomach ache

 

Which of the following substances might you expect to find in the ingredients list of an indigestion remedy?

CORRECT ANSWER
 Found in Idigestion RemediesNot found in Indigestion Remedies
Calcium carbonate
Vinegar
Lemon juice
Sodium carbonate
Citric acid
Magnesium carbonate
EDDIE SAYS
As you can see, the remedies contained carbonates - you wouldn't want to add more acid (like vinegar) to the stomach acids! There can be an unfortunate side effect to indigestion remedies. All the carbonates involved produce carbon dioxide gas when they react with the stomach acid and the gas has to escape from the body - burp!
---- OR ----

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