Required practical - preparation of soluble salt

• What is the purpose of indicators in chemistry?

  Indicators are used to determine whether a solution is acidic or alkaline.
• What do acids produce when they react with metals, bases, and carbonates?

  Acids react with metals, bases, and carbonates to produce salts.
• What is neutralisation in chemistry?

  Neutralisation is the reaction between an acid and a base.
• What is the process for preparing a soluble salt from an insoluble oxide or carbonate?

  • Use a Bunsen burner to heat dilute acid.
  • Mix the solid oxide or carbonate with the acid.
  • Filter the mixture to remove excess solid.
  • Evaporate the filtrate to obtain the salt.
  • Crystallise the salt from the solution.
• What is a soluble substance?

  A soluble substance is able to dissolve in a solvent.
• What is an insoluble substance?

  An insoluble substance is unable to dissolve in a particular solvent.
• What is the definition of a carbonate in chemistry?

  A carbonate is a substance containing carbonate ions.
• What are the properties of hydrochloric acid?

  Hydrochloric acid is a substance that produces more hydrogen ions than hydroxide ions when dissolved in water.
• What is the role of a solvent in a solution?

  The solvent is the liquid in which the solute dissolves to form a solution.
• What are the steps involved in the preparation of a soluble salt from an insoluble oxide or carbonate?

  1. Add powdered insoluble reactant to acid in a beaker.
  2. Stir to mix until in excess.
  3. Filter the mixture to remove excess powder.
  4. Heat the filtrate in a water bath.
  5. Allow crystallisation to occur.
• What apparatus is needed for mixing the solid and acid?

  A beaker and stirring rod are needed for mixing.
• What is the purpose of a filter funnel in the practical?

  The filter funnel is used for filtering the mixture.
• What should be done when heating the solution during the practical?

  Heat until about half the water from the solution has been removed by evaporation.
• What is the significance of eye protection during the practical?

  Eye protection must be worn to prevent injury from splashes.
• What should be evaluated after completing the practical?

  The evaluation should address the quality of crystals obtained and safety improvements.
• What is the definition of excess in chemistry?

  A substance is in excess if there is more than enough of it to react with another reactant.
• What should be done if crystals need to be dried?

  Crystals can be dried by dabbing gently with filter paper.
• What precautions should be taken when using hydrochloric acid and a Bunsen burner?

  • Use dilute hydrochloric acid to reduce corrosiveness.
  • Do not touch hot apparatus to avoid burns.
  • Tie back long hair and secure loose clothing to prevent fire hazards.
• What is the purpose of using different acids in the preparation of salts?

  Different acids are used to make specific types of salts: hydrochloric acid for chlorides, sulfuric acid for sulfates, and nitric acid for nitrates.
• What is the role of a water bath in the practical?

  A water bath is used to heat the solution gently and evenly.
• How can the quality of crystals be evaluated after the practical?

  The quality of crystals can be evaluated based on their size, shape, and purity.
• What is the importance of considering hazards and risks in the practical?

  Considering hazards and risks is important to ensure safety during the experiment.
• What is the definition of crystallisation in chemistry?

  Crystallisation is the process of producing crystals from a solution by evaporating the solvent.
• What should be done if the practical is not carried out safely?

  Improvements should be suggested to enhance safety in future experiments.
• What factors should be considered when planning the practical?

  Factors include apparatus selection, reagents, hazards, risks, and precautions.
• What is the purpose of using a conical flask during the practical?

  A conical flask is used for filtering the mixture.
• Why is it important to use appropriate heating devices safely?

  Using appropriate heating devices safely prevents accidents and injuries.
• What is the definition of a crystal in chemistry?

  A crystal is a solid containing particles joined together to form a regular arrangement or repeating pattern.
• What should be done if unreacted powder is left after mixing?

  The unreacted powder should be filtered out to obtain the filtrate.
• How does the choice of solid reactant affect the preparation of soluble salts?

  The solid must include the correct metal ions, react with the acid, and be insoluble in water.
• What is the significance of using a watch glass during crystallisation?

  A watch glass is used to allow crystallisation to occur in a warm, dry place.
• What is the role of a tripod in the practical setup?

  A tripod is used to support the beaker of water over the Bunsen burner.
• What improvements could be made to the method after evaluating the practical?

  Improvements could include better safety measures or more efficient techniques.
• What is the purpose of using a stirring rod in the practical?

  A stirring rod is used to mix the solid and acid together.
• Why is it important to follow safety precautions during the practical?

  Following safety precautions is crucial to prevent accidents and ensure a safe working environment.
• How can the effectiveness of the practical be assessed?

  The effectiveness can be assessed by the quality of the crystals and adherence to safety protocols.
• What is the definition of a reagent in chemistry?

  A reagent is a substance used in a chemical reaction to detect, measure, or produce other substances.
• What is the importance of using the correct metal ions in the solid reactant?

  The correct metal ions are necessary to ensure the desired salt is produced.
• What should be done if the crystals obtained are of poor quality?

  Evaluate the method and suggest improvements to enhance crystal quality.
• What is the role of a filter paper in the practical?

  Filter paper is used to separate the excess solid from the liquid in the mixture.