Edexcel C1.3 Acids

Below are the specification statements from Edexcel, and just below the the videos to help your understanding and revision. The wording of the statements is important, this is what the exam board tell us you should know - so make sure you know it well!

 

'Recall that hydrochloric acid is produced in the stomach to:

a - help digestion

b - kill bacteria' (Pearson, 2013)

 

'Describe indigestion remedies as containing substances that neutralise excess stomach acid' (Pearson, 2013)

 

'Investigate the effectiveness of different indigestion remedies' (Pearson, 2013)

 

'Recall that acids are neutralised by:

a - metal oxides

b - metal hydroxides

c -metal carbonates

to produce salts (no details of salt preparation techniques or ions are required)' (Pearson, 2013)

'Recall that:

a - hydrochloric acid produces chloride salts

b - nitric acid produces nitrate salts

c - sulfuric acid produces sulfate salts' (Pearson, 2013)

'Describe electrolysis as a process in which electrical energy, from a d.c. supply, decomposes compounds, by considering the electrolysis of dilute hydrochloric acid to produce hydrogen and chlorine (explanations of the reactions at the electrodes are not required)' (Pearson, 2013)

 

'Investigate the electrolysis of dilute hydrochloric acid' (Pearson, 2013)

 

'Describe the chemical test for hydrogen' (Pearson, 2013)

 

'Describe the chemical test for chlorine' (Pearson, 2013)

 

'Recall that chlorine can be obtained from sea water by electrolysis (explanations of the reactions at the electrodes are not required)' (Pearson, 2013)

 

'Describe chlorine as a toxic gas and that this leads to potential hazards associated with its large-scale manufacture' (Pearson, 2013)

 

'Describe the use of chlorine in the manufacture of bleach and of the polymer poly(chloroethene) (PVC)' (Pearson, 2013)

 

'Recall that water can be decomposed by electrolysis to form hydrogen and oxygen' (Pearson, 2013)

 

'Describe the chemical test for oxygen' (Pearson, 2013)

 

Reference list

Edexcel, GCSE Specification Chemistry. 2013 http://filestore.aqa.org.uk/subjects/AQA-PHYS-W-SP-14.PDF date accessed 08.11.15