Skip to content

Dabour HubLEARN · PRACTICE · EXPLORE Sign inStudent

Unit 3 of 7

Chemical Reactions

OCR Gateway GCSE Combined Science A J250 — Chemistry · 20 lessons · 19 quizzes

Start the first lesson

3.1

Unit 3 overview: Chemical Reactions20 min

3.1.1

Chemical Symbols and Formulae20 min

3.1.2

Deducing Formulae Using Common Ions20 min

3.1.3

Balancing Chemical Equations20 min

3.1.4

Writing Balanced Ionic Equations20 min

3.1.5

The Avogadro Constant20 min

3.1.6

Conservation of Mass20 min

3.1.7

Using Moles to Balance Equations20 min

3.1.8

Calculating Masses from Balanced Equations20 min

3.2.1

Exothermic and Endothermic Reactions20 min

3.2.2

Calculating Energy Changes20 min

3.3.1

Oxidation and Reduction20 min

3.3.2

Oxidation and Reduction in Terms of Electrons20 min

3.3.3

Acids and Alkalis20 min

3.3.4

Neutralisation20 min

3.3.5

Effect of Hydrogen Ion Concentration on pH20 min

3.4.1

Electrolysis20 min

3.4.2

Electrolysis of Aqueous Solutions20 min

3.4.3

Reactions at Electrodes20 min

3.4.4

Half Equations20 min

Practice for this unit

3.1.1 Chemical Symbols and Formulae - MCQ practice (6 questions)

Marked questions with instant feedback and a full review.

3.1.2 Deducing Formulae Using Common Ions - MCQ practice (6 questions)

Marked questions with instant feedback and a full review.

3.1.3 Balancing Chemical Equations - MCQ practice (9 questions)

Marked questions with instant feedback and a full review.

3.1.4 Writing Balanced Ionic Equations - MCQ practice (8 questions)

Marked questions with instant feedback and a full review.

3.1.5 The Avogadro Constant - MCQ practice (13 questions)

Marked questions with instant feedback and a full review.

3.1.6 Conservation of Mass - MCQ practice (12 questions)

Marked questions with instant feedback and a full review.

3.1.7 Using Moles to Balance Equations - MCQ practice (8 questions)

Marked questions with instant feedback and a full review.

3.1.8 Calculating Masses from Balanced Equations - MCQ practice (11 questions)

Marked questions with instant feedback and a full review.

3.2.1 Exothermic and Endothermic Reactions - MCQ practice (24 questions)

Marked questions with instant feedback and a full review.

3.2.2 Calculating Energy Changes - MCQ practice (46 questions)

Marked questions with instant feedback and a full review.

3.3.1 Oxidation and Reduction - MCQ practice (19 questions)

Marked questions with instant feedback and a full review.

3.3.2 Oxidation and Reduction in Terms of Electrons - MCQ practice (32 questions)

Marked questions with instant feedback and a full review.

3.3.3 Acids and Alkalis - MCQ practice (9 questions)

Marked questions with instant feedback and a full review.

3.3.4 Neutralisation - MCQ practice (8 questions)

Marked questions with instant feedback and a full review.

3.3.5 Effect of Hydrogen Ion Concentration on pH - MCQ practice (30 questions)

Marked questions with instant feedback and a full review.

3.4.1 Electrolysis - MCQ practice (6 questions)

Marked questions with instant feedback and a full review.

3.4.2 Electrolysis of Aqueous Solutions - MCQ practice (34 questions)

Marked questions with instant feedback and a full review.

3.4.3 Reactions at Electrodes - MCQ practice (6 questions)

Marked questions with instant feedback and a full review.

3.4.4 Half Equations - MCQ practice (5 questions)

Marked questions with instant feedback and a full review.