Preparation of soluble salts

• Physics
• Secondary Education
• Age 12,13

26 April 2023

Preparation of Soluble Salts

16 May 2023 - Chemistry

Final Semester Project

• Complete the Experimental Project Plan.
• Complete Part 1 and Part 2 of Final Paperwork. Experimental Research Project" found in your Google Classroom.
• 5 % deduction will be given to the group that's not working.
• 5 points merits will be added to the team with the most effort and engagement.

Content objectives

I can describe the preparation, separation and purification of soluble salts by the reaction of an acid with: 

• (a) an alkali by titration; 
• (b) excess metal; 
• (c) excess insoluble base; 
• (d) excess insoluble carbonate.

How do you prepare salts?

Method B: 

• reacting a dilute acid and alkali (soluble base)

What are salts?

• Salt is a compound formed when the hydrogen atom in an acid is replaced by a metal.

What are the uses of salts?

• fertilisers
• batteries
• cleaning products
• healthcare products
• fungicides

How do you name salts?

Two parts (from the reactants)

• First part: comes from the metal, metal oxide or metal carbonate used in the reaction
• Second part: comes from the acid

Give one example of salt.

What are the clues?

Acid used:

• Hydrochloric acid
• Sulfuric acid
• Nitric acid
• Citric acid
  
• Phosphoric acid

Metal, Metal oxide, or Metal carbonate used:

How do you prepare soluble salts?

• Method A: adding acid to solid metal, insoluble base or insoluble carbonate

How do you prepare soluble salts?

How do you prepare soluble salts?

How do you prepare soluble salts?

What is one example of this preparation?

• Preparation of pure, hydrated copper(II) sulfate crystals using method A

copper(II) oxide + sulfuric acid → copper(II) sulphate + water

CuO (s) + H2SO4 (aq) → CuSO4 (aq) + H2O (l)

• Add dilute sulfuric acid into a beaker and heat using a Bunsen burner flame
• Add copper(II) oxide (insoluble base), a little at a time to the warm dilute sulfuric acid and stir until the copper (II) oxide is in excess (stops disappearing)
• Filter the mixture into an evaporating basin to remove the excess copper(II) oxide
• Leave the filtrate in a warm place to dry and crystallize
• Decant excess solution
• Blot crystals dry with filter paper

Procedure

• Method B: reacting a dilute acid and alkali (soluble base)

How do you prepare soluble salts?

How do you prepare soluble salts?

How do you prepare soluble salts?

How do you prepare soluble salts?

• Use a pipette to measure the alkali into a conical flask and add a few drops of indicator (thymolphthalein or methyl orange)
• Add the acid into the burette and note the starting volume
• Add the acid very slowly from the burette to the conical flask until the indicator changes to the appropriate colour
• Note and record the final volume of acid in the burette and calculate the volume of acid added (starting volume of acid - final volume of acid)

Procedure

• Heat the resulting solution in an evaporating basin to partially evaporate, leaving a saturated solution (crystals just forming on the sides of the basin or a glass rod dipped in and then removed)
• Leave to crystallise, decant excess solution and allow crystals to dry.

Procedure

26 April 2023

Preparation of Soluble Salts

• Add dilute ___________ into a beaker and heat using a _________ flame
• Add copper________ (insoluble base), a little at a time to the warm dilute ___________ and stir until the ____________ is in excess (stops disappearing).
• Filter the mixture into an/a ______________ to remove the excess copper(II) oxide.
• Leave the __________ in a warm place to dry and ____________.
• __________ excess solution.
• Blot crystals dry with _______________.

Complete this procedure: Preparation of pure, hydrated copper(II) sulfate crystals