Cette leçon contient 23 diapositives, avec quiz interactif et diapositives de texte.
Éléments de cette leçon
26 April 2023
Preparation of Soluble Salts
Slide 1 - Diapositive
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.
Slide 2 - Diapositive
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.
Slide 3 - Diapositive
How do you prepare salts?
Method B:
reacting a dilute acid and alkali (soluble base)
Slide 4 - Diapositive
What are salts?
Salt is a compound formed when the hydrogen atom in an acid is replaced by a metal.
Slide 5 - Diapositive
What are the uses of salts?
fertilisers
batteries
cleaning products
healthcare products
fungicides
Slide 6 - Diapositive
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
Slide 7 - Diapositive
Give one example of salt.
Slide 8 - Question ouverte
What are the clues?
Acid used:
Hydrochloric acid
Sulfuric acid
Nitric acid
Citric acid
Phosphoric acid
Metal, Metal oxide, or Metal carbonate used:
Slide 9 - Diapositive
How do you prepare soluble salts?
Method A: adding acid to solid metal, insoluble base or insoluble carbonate
Slide 10 - Diapositive
How do you prepare soluble salts?
Slide 11 - Diapositive
How do you prepare soluble salts?
Slide 12 - Diapositive
How do you prepare soluble salts?
Slide 13 - Diapositive
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)
Slide 14 - Diapositive
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
Slide 15 - Diapositive
Method B: reacting a dilute acid and alkali (soluble base)
How do you prepare soluble salts?
Slide 16 - Diapositive
How do you prepare soluble salts?
Slide 17 - Diapositive
How do you prepare soluble salts?
Slide 18 - Diapositive
How do you prepare soluble salts?
Slide 19 - Diapositive
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
Slide 20 - Diapositive
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
Slide 21 - Diapositive
26 April 2023
Preparation of Soluble Salts
Slide 22 - Diapositive
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