CH25 – Reactions Practice

Dates

• P4 – Tuesday, Octobert 24th
• P5 – Wednesday, October 25th
• P7 – Thursday, October 26th

Reactions Worksheet

• questions?
• suggestions?
• note – answers edited and updated

New Idea – Activity

• Single Displacement – only occurs when more active
• Metal series / Non-metal series
• Sample question: write balanced chemical equations for the following reactions. If no reaction occurs, simply write NR. (a) Nickel metal is added to a solution of copper(II) nitrate; (b) a solution of zinc nitrate is added to a solution of magnesium sulfate; (c) hydrochloric acid is added to gold metal; (d) chromium metal is immersed in an aqueous solution of cobalt(II) chloride; (e) hydrogen gas is bubbled through a solution of silver nitrate.

New Idea – Selective Precipitation (solubility Logic)

• Use the solubility rules to determine the answer
• Sample Question 1 – Separate samples of a solution of an unknown ionic compound are treated with dilute AgNO₃, Pb(NO₃)₂, and BaCl₂. Precipitates form in all three cases. Which of the following could be the anion of the unknown salt? bromide, carbonate, nitrate
• Sample Question 2 – An aqueous solution contains the folowing metal ions: silver, barium, sodium. Describe the steps needed to separate the ions from each other. What else could possibly be in the solution to start?
• Practice Problems: Textbook Ch. 4 (53, 54)

Test 2 – Next Class Meeting

• Q1 – Balancing
• Q2 – Reaction Types
• Q3 – Reaction Prediction
• Q4 – FM / FI / NI reactions
• Q5 – Redox Identification
• Q6 – Solubility Logic Puzzle

Homework

• Study for the test
• Have you seen the course syllabus?
• Have you seen the posted test from last year?