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Acids & Bases — MyGCSEScience
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FreeScienceLessons · AQA ChemistryAcids and Bases
Cognito · AQA ChemistryNeutralisation and salt production
Key facts
pH scale and acids/bases — fill in the table
| Term | Meaning |
|---|
| pH 0–6 | |
| pH 7 | |
| pH 8–14 | |
| Acid | |
| Alkali | |
| Strong acid | |
| Weak acid | |
| pH scale | |
Reactions of acids — salt production — fill in the table
| Acid reacts with | Products | Example |
|---|
| Metal | | |
| Metal oxide/hydroxide (base) | | |
| Carbonate | | |
| Salt naming | | |
Exam questions — 4 questions · 10 marks
⚡ Extended questions included. Read the hint. Show all working. AI marks against the real AQA mark scheme.
1 markNeutralisationAQA 8462 P1 style
Hydrochloric acid reacts with sodium hydroxide solution. What are the products?
A Sodium chloride and hydrogen
B Sodium chloride and water
C Sodium oxide and water
D Sodium chloride, water and carbon dioxide
1 markSalt namingAQA 8462 P1 style
Calcium carbonate reacts with dilute sulfuric acid. What salt is produced?
A Calcium chloride
B Calcium nitrate
C Calcium sulfate
D Calcium carbonate
4 marksAcid reactionsAQA 8462 P1 Jun 2024 style
Write balanced equations for the reactions of dilute hydrochloric acid with (a) magnesium metal and (b) copper(II) carbonate. (4 marks)
Hint: (a) acid + metal → salt + hydrogen. (b) acid + carbonate → salt + water + CO₂. Balance by adjusting coefficients.
+40 XP
3 marksStrong vs weak acidsAQA 8462 P1 style
Explain the difference between a strong acid and a weak acid at the same concentration. How does this affect their pH values? (3 marks)
Hint: Key words: strong acid = fully ionises. Weak acid = partially ionises. More H⁺ ions → lower pH.
+30 XP
Quick recall flashcards
Module complete! 🎉
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