C4- making soluble salts required practical Flashcards
What is the purpose of the required practical?
To prepare a pure, dry sample of a soluble salt from an insoluble oxide or carbonate
What heating devices are used in this practical?
Bunsen burner and water bath or electric heater
What are the key techniques used in this practical?
Filtration, evaporation, and crystallisation
What safety equipment must be worn during the practical?
Eye protection
What is the first step in planning the practical?
Determine which apparatus to use and create diagrams for setup
What apparatus is required for mixing the solid and acid?
Beaker and stirring rod
What apparatus is used for filtering the mixture?
Conical flask, filter paper, and filter funnel
What is the purpose of the evaporating basin?
To heat the solution and remove the solvent through evaporation
What reagents are recommended for making chlorides, sulfates, and nitrates?
Hydrochloric acid for chlorides, sulfuric acid for sulfates, nitric acid for nitrates
What criteria must the solid meet when preparing the soluble salt?
Must include correct metal ions, react with acid, and be insoluble in water
What is a potential hazard of using hydrochloric acid?
It is corrosive and can damage skin and clothes
What precaution should be taken when using concentrated hydrochloric acid?
Use dilute hydrochloric acid
What should be done to prevent burns when using a Bunsen burner?
Do not touch hot apparatus
Fill in the blank: Add powdered insoluble reactant to acid in a beaker, one spatula at a time, stirring to mix. Continue adding powder until it is in _______.
excess
What should be done with the excess powder after mixing?
Filter the mixture to remove the excess powder
What is the next step after collecting the filtrate?
Pour the filtrate into an evaporating basin
What indicates that the evaporation process is nearly complete?
Small crystals start to appear around the edge of the evaporating basin
Where should the remaining solution be placed for crystallisation?
In a warm, dry place
What is a method to dry the crystals if necessary?
Dabbing gently with filter paper
What aspects should be evaluated after completing the practical?
Quality of crystals, potential improvements, and safety of the practical
