Cette leçon contient 16 diapositives, avec diapositives de texte.
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Prac 2.5b - Investigating relative acidity
Topic 7. Acids, Bases, and Salts
20 March 2024
Slide 1 - Diapositive
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 - Diapositive
base - a substance that neutralises an acid, producing salt and water as the only products; bases act as proton acceptors
Keyword
Slide 3 - Diapositive
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 - Diapositive
Which of the four acids is the weakest (sulfuric acid, hydrochloric acid, ethanoic acid, or methanoic acid)?
Experimental Question
Slide 5 - Diapositive
Write your team hypothesis or prediction.
Hypothesis
timer
1:00
Slide 6 - Diapositive
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 - Diapositive
Prac 2.5c - Investigating relative alkalinity
Topic 7. Acids, Bases, and Salts
20 March 2024
Slide 8 - Diapositive
perform a simple titration
use chemical tests to determine the products produced when reacting alkalis
Our Learning Goals
Slide 9 - Diapositive
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 - Diapositive
Which of the two alkaline solutions is stronger: sodium hydroxide or calcium hydroxide?
Experimental Question
Slide 11 - Diapositive
Write your team hypothesis or prediction.
Hypothesis
timer
1:00
Slide 12 - Diapositive
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 - Diapositive
Wash the materials you used.
Clean your table.
Return the washed/ cleaned materials.
Clean-up
timer
7:00
Slide 14 - Diapositive
Prac 2.5 - Weak and Strong Acids
Topic 7. Acids, Bases, and Salts
18 March 2024
Slide 15 - Diapositive
Share the results of your experiment.
What similarities and differences have you noticed?
