D5 MODULE 8: LESSON 4 ASSIGNMENT CHEM 30 Westmount Secondary School

Chemistry 30: Module 8: Lesson 4 1 Assignment Booklet


D5 MODULE 8: LESSON 4 ASSIGNMENT CHEM 30

(?/18 Marks)
Lab—Testing Bronsted-Lowry Reaction Predictions

Pre-Lab
1. The investigation you will complete involves combining the solutions listed in the
tables below. Use the method to predict acid-base reactions to complete the following
tasks for each reaction provided:

 Write a balanced chemical equation
 Indicate the position of equilibrium for the resulting system
 Predict the result from each reaction
 Identify the result of one test you would perform to confirm the prediction

List your answers in the tables provided.

(2 marks) REACTION 1
Reactants Predictions
Balanced NH4Cl + NaOH  NH3 + NaCl + H2O
chemical
equation
Position of Ammonia is a weak base, reaction will be in
equilibrium the forward direction
Aqueous Aqueous
ammonium sodium Predicted Ammonia odor
chloride hydroxide result
Tests to It will form a white smoke in the presence of
confirm hydrogen chloride gas, HCl(g). The white
smoke is ammonium chloride.


(2 marks) REACTION 2
Reactants Predictions
Balanced NaCH3COO(aq) + HCl(aq)  NaCl(aq) +
chemical CH3COOH(aq)
equation
Position of Reaction favored right
Aqueous equilibrium
Hydrochloric
sodium
acid Predicted Vinegar odor
ethanoate
result
Tests to Na2CO3 CH3COOH(benzoic acid)
confirm produces a rapid effervescence of CO2

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