Prac 5C - Relative alkalinity

• Chemistry
• Secondary Education
• Age 12,13

Prac 2.5c - Investigating relative alkalinity

Topic 7. Acids, Bases, and Salts 

25 March 2024

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

Our Learning Goals

RECALL

• 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 ⚠️

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

Experimental Question

Write your team hypothesis or prediction.

Hypothesis

• 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 ⚠️

• Wash the materials you used.
• Clean your table.
• Return the washed/ cleaned materials.

Clean-up

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

Wrap-up