Determination of Formulae (OCR A-Level Chemistry A): Quizzes
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Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does an empirical formula represent?
What does an empirical formula represent?
Simplest whole-number ratio of atoms
Which type of substance must use an empirical formula rather than a molecular formula?
Which type of substance must use an empirical formula rather than a molecular formula?
Giant ionic structures like
What is the empirical formula of dinitrogen tetroxide ()?
What is the empirical formula of dinitrogen tetroxide ()?
What is the relative molecular mass of methane ()? Use : C = 12.0, H = 1.0
What is the relative molecular mass of methane ()? Use : C = 12.0, H = 1.0
16.0
If 0.030 mol Ca combines with 0.060 mol Cl, what is the empirical formula?
If 0.030 mol Ca combines with 0.060 mol Cl, what is the empirical formula?
What is water of crystallisation in a hydrated salt?
What is water of crystallisation in a hydrated salt?
Water molecules within the crystal structure
What happens when hydrated copper(II) sulfate () is heated?
What happens when hydrated copper(II) sulfate () is heated?
Blue crystals turn white as water is lost
What does the dot (•) represent in the formula ?
What does the dot (•) represent in the formula ?
Separates the salt from water molecules
A salt loses 3.60 g water (0.200 mol) leaving 6.38 g salt (0.040 mol). Find the ratio.
A salt loses 3.60 g water (0.200 mol) leaving 6.38 g salt (0.040 mol). Find the ratio.
1:5
Why must you heat to constant mass when finding the formula of a hydrated salt?
Why must you heat to constant mass when finding the formula of a hydrated salt?
To ensure all water has been removed