Adapting a multistep chemical procedure for making a pure dry salt
I can describe and explain adaptations to a multistage chemical procedure to alter or improve the quality of the product.
Adapting a multistep chemical procedure for making a pure dry salt
I can describe and explain adaptations to a multistage chemical procedure to alter or improve the quality of the product.
Lesson details
Key learning points
- Gently heating the acid speeds up the reaction, ensuring all acid reacts.
- The salt should be dried using an appropriate method (using filter paper, or in the oven).
- A pure sample should be prepared with equipment washed with distilled water to avoid contamination.
- Reacting a metal hydroxide with an acid also produces a salt and water.
- Reacting a metal carbonate with an acid can produce a desired salt with water, as well as carbon dioxide gas.
Common misconception
Pupils can sometimes mistake the excess base for the salt formed as it is a solid.
Emphasise at the beginning of the experiment what soluble means and that the salt will be initially obtained dissolved in water.
Keywords
Method - Describes how an experiment is carried out; it is a step-by-step procedure.
Apparatus - A piece of equipment that is designed for a particular use.
Evaluate - To evaluate something is to make a judgement about it with respect to a particular purpose.
Adapt - To make suitable for use or purpose, e.g. equipment or steps in an experimental procedure.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
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Starter quiz
6 Questions
forming solid crystals from saturated solution by evaporating solvent
a technique to separate insoluble solids from a liquid mixture
when a substance does not dissolve in a particular solvent
reaction of acid and base, producing solution of metal salt and water
an insoluble solid formed when two solutions react together