Prac 5B - Relative acidity

Prac 2.5b - Investigating relative acidity
Topic 7. Acids, Bases, and Salts 
20 March 2024
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ChemistrySecondary EducationAge 12,13

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Prac 2.5b - Investigating relative acidity
Topic 7. Acids, Bases, and Salts 
20 March 2024

Slide 1 - Tekstslide


  • use a variety of acids to explore the differences in their relative acidity
  • make conclusions about different acids based on observations and measurements made in a number of separate experiments
Our Learning Goals

Slide 2 - Tekstslide


  • base - a substance that neutralises an acid, producing salt and water as the only products; bases act as proton acceptors
Keyword

Slide 3 - Tekstslide


  • Report any acid spills to your teacher immediately. 
  • Limewater, sulfuric acid and hydrochloric acid are moderate hazards.
  •  Copper (II) oxide is corrosive, a moderate hazard and harmful to the aquatic environment. Waste from experimental use must not be poured down the drain.
  • Methyl orange indicator is corrosive, flammable, a health and moderate hazard, hazardous to the aquatic environment, and acutely toxic.
  • You will need to stand up if you need a hot water bath to warm the mixture at step 3 of the method.
  • Ethanoic acid is irritant.
  • Magnesium ribbon is flammable.
  • Wear eye protection throughout. 
SAFETY ⚠️

Slide 4 - Tekstslide


Which of the four acids is the weakest (sulfuric acid, hydrochloric acid, ethanoic acid, or methanoic acid)?
Experimental Question

Slide 5 - Tekstslide

Write your team hypothesis or prediction.
Hypothesis
timer
1:00

Slide 6 - Tekstslide


  • Report any acid spills to your teacher immediately. 
  • Limewater, sulfuric acid and hydrochloric acid are moderate hazards.
  •  Copper (II) oxide is corrosive, a moderate hazard and harmful to the aquatic environment. Waste from experimental use must not be poured down the drain.
  • Methyl orange indicator is corrosive, flammable, a health and moderate hazard, hazardous to the aquatic environment, and acutely toxic.
  • You will need to stand up if you need a hot water bath to warm the mixture at step 3 of the method.
  • Ethanoic acid is irritant.
  • Magnesium ribbon is flammable.
  • Wear eye protection throughout. 
SAFETY ⚠️

Slide 7 - Tekstslide

Prac 2.5c - Investigating relative alkalinity
Topic 7. Acids, Bases, and Salts 
20 March 2024

Slide 8 - Tekstslide


  • perform a simple titration
  • use chemical tests to determine the products produced when reacting alkalis
Our Learning Goals

Slide 9 - Tekstslide


  • Report any alkali spills to your teacher immediately. 
  • Dilute sodium hydroxide and calcium hydroxide solution are irritants.
  • Hydrochloric acid is a moderate hazard.
  • Methyl orange indicator is corrosive, flammable, a health and moderate hazard, hazardous to the aquatic environment, and acutely toxic.
  • Wear eye protection throughout. 
SAFETY ⚠️

Slide 10 - Tekstslide


Which of the two alkaline solutions is stronger: sodium hydroxide or calcium hydroxide?
Experimental Question

Slide 11 - Tekstslide

Write your team hypothesis or prediction.
Hypothesis
timer
1:00

Slide 12 - Tekstslide


  • Report any alkali spills to your teacher immediately. 
  • Dilute sodium hydroxide and calcium hydroxide solution are irritants.
  • Hydrochloric acid is a moderate hazard.
  • Methyl orange indicator is corrosive, flammable, a health and moderate hazard, hazardous to the aquatic environment, and acutely toxic.
  • Wear eye protection throughout. 
SAFETY ⚠️

Slide 13 - Tekstslide


  • Wash the materials you used.
  • Clean your table.
  • Return the washed/ cleaned materials.
Clean-up
timer
7:00

Slide 14 - Tekstslide

Prac 2.5 - Weak and Strong Acids
Topic 7. Acids, Bases, and Salts 
18 March 2024

Slide 15 - Tekstslide


  • Share the results of your experiment.
  • What similarities and differences have you noticed?
Wrap-up

Slide 16 - Tekstslide