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Prac 2.5 - Weak and Strong Acids
Topic 7. Acids, Bases, and Salts
18 March 2024
Slide 1 - Diapositive
use the universal indicator to quantify the pH value of different acids
identify the product produced when reacting acids with metals
evaluate the strength of acids by making several different observations
Our Learning Goals
Slide 2 - Diapositive
acid - a substance that dissolves in water, producing H+ (aq) ions - a solution of acid turns litmus red and has a pH below 7; it acts as a proton donor
alkalis - soluble bases that produce OH-(aq) ions in water - a solution of an alkali turns litmus blue and has a pH above 7
indicator - a substance that changes colour when added to acidic or alkaline solutions, e.g., litmus or thymolphthalein
methyl orange - an acid-base indicator that is red in acidic and yellow in alkaline solutions
pH scale - a scale running from below 0 to 14, used for expressing the acidity or alkalinity of a solution; a neutral solution has a pH of 7
Universal indicator - a mixture of indicators that has different colours in solutions of different pH
Keywords
Slide 3 - Diapositive
Slide 4 - Diapositive
Prac 2.5 - Weak and Strong Acids
Topic 7. Acids, Bases, and Salts
18 March 2024
Slide 5 - Diapositive
Report any acid spills to your teacher immediately. The universal indicator will stain your clothing and skin.
Methyl orange indicator is corrosive, flammable, a health and moderate hazard, hazardous to the aquatic environment, and acutely toxic.
Sodium hydroxide and sodium carbonates are irritants.
Wear eye protection throughout.
SAFETY ⚠️
Slide 6 - Diapositive
Materials Checklist
Slide 7 - Diapositive
Which of the two acids (Acid X and Acid Y) could be strong?
Experimental Question
Slide 8 - Diapositive
Write your team hypothesis or prediction.
Hypothesis
timer
2:00
Slide 9 - Diapositive
Prac 2.5 - Weak and Strong Acids
Topic 7. Acids, Bases, and Salts
18 March 2024
Slide 10 - Diapositive
Follow the steps on pages 114, 115, 116of your practical workbook.
Experiment Proper
Slide 11 - Diapositive
Report any acid spills to your teacher immediately. The universal indicator will stain your clothing and skin.
Methyl orange indicator is corrosive, flammable, a health and moderate hazard, hazardous to the aquatic environment, and acutely toxic.
Sodium hydroxide and sodium carbonates are irritants.
Wear eye protection throughout.
SAFETY ⚠️
timer
50:00
Slide 12 - Diapositive
Wash the materials you used.
Clean your table.
Return the washed/ cleaned materials.
Clean-up
timer
7:00
Slide 13 - Diapositive
Prac 2.5 - Weak and Strong Acids
Topic 7. Acids, Bases, and Salts
18 March 2024
Slide 14 - Diapositive
Share the results of your experiment.
What similarities and differences have you noticed?
