☰ Year plan · Science

Types of reactions (B): swapping partners and electrons

Week 2 · Lesson 1 Types of Chemical Reactions (B): double replacement, neutralisation and the universal indicator, acid with a salt, precipitation, hard water, oxidation and reduction as electron transfer · 3 lessons
Answers are for parents and teachers.
1
Write the neutralisation of nitric acid, HNO₃, with potassium hydroxide, KOH. Name the salt.
2
Draw the colour order of a universal indicator from strong alkali to acid.
3
In Ca → Ca²⁺ + 2e⁻, is calcium oxidised or reduced? How many electrons do 3 Ca atoms lose?
4
A friend says the oxidising agent is the substance that is oxidised. Is that right?
5
A grown-up pours a little vinegar on a pinch of baking soda in an open cup. Write the word equation of what you see.