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In Course: GCSE Chemistry (AQA): Paper 1

AQA GCSE Chemistry: Required Practical - Making a Soluble Salt

Covers the method for preparing a pure, dry sample of a soluble salt from an insoluble base or carbonate. Includes the reasons for each step, such as using an excess of the base, filtration, and crystallisation.

An extreme close-up photograph of vibrant, pure blue copper sulfate crystals glistening and forming in an evaporating basin, with a soft, blurred background hinting at laboratory equipment and warm light. The composition is a 3:2 landscape, emphasizing the intricate beauty of the formed crystals.

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Deck Contents

25 Cards
Lesson#1
In this deck, you will learn the step-by-step method for a required practical in GCSE Chemistry: making a pure, dry sample of a soluble salt. We'll use the example of making copper sulfate from copper oxide and sulfuric acid, and we'll explore the scientific reasons behind each step, from reacting the chemicals to crystallising the final product.
Quiz#2
To make a soluble salt, what two types of substance are typically reacted together in this practical?

an acid and an insoluble base

Quiz#3
When an acid reacts with an insoluble base, what are the two products?

a salt and water

Quiz#4
To make the soluble salt copper sulfate, what acid should be used?

sulfuric acid

Quiz#5
To make copper sulfate, what black, insoluble base is reacted with sulfuric acid?

copper oxide

Lesson#6
The first step is to react the acid and the insoluble base. You start by gently warming the acid in a beaker, usually over a Bunsen burner. This is done to increase the rate of reaction. Then, you add the insoluble base, like copper oxide powder, to the warm acid and stir. You keep adding the base until no more will dissolve, and you can see some unreacted solid at the bottom. This is known as adding the base in excess.

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