Indigestion tablets can be used to reduce the amount of acid in the stomach which can cause stomach pain and heartburn.
The active ingredient in many indigestion tablets is calcium carbonate such as the tablet in Figure 1.
Figure 1
What word correctly describes products such as indigestion tablets?
Tick (✓) one box.
Compound | |
Element | |
Formulation | |
Molecule |
When indigestion tablets are added to an acid, what type of reaction will occur?
Circle the correct answer.
oxidation | neutralisation | decomposition |
Complete the word equation for the reaction between calcium carbonate and hydrochloric acid.
Choose words from the box below.
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calcium carbonate + hydrochloric acid → _________ + _________ + carbon dioxide
The carbon dioxide produced in this reaction can be identified with a simple test using the equipment in Figure 2.
Figure 2
Choose the correct word in each box to finish the sentences below.
Solution A is |
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If carbon dioxide is present, solution A will |
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The indigestion tablets shown in Figure 1 contains calcium carbonate, CaCO3, as the active ingredient.
Calculate the relative formula mass (Mr) of calcium carbonate.
Relative atomic masses: Ca = 40; C = 12; O = 16
Relative formula mass = ____________________
Calculate the percentage by mass of calcium in calcium carbonate, CaCO3.
Use your answer from part (e) and the equation below.
Percentage by mass of calcium = _____________________ %
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