   Chapter 3, Problem 96SCQ

Chapter
Section
Textbook Problem

You want to prepare barium chloride, BaC12, using an exchange reaction of some type. To do so, you have the following reagents from which to select the reactants: BaSO4, BaBr2, BaCO3, Ba(OH)2, HCI, HgSO4, AgNO3, and HNO3. Write a complete, balanced equation for the reaction chosen. (Note: There are several possibilities.)

Interpretation Introduction

Interpretation:

The complete balanced equation for the reaction chosen should be written.

Concept introduction:

Precipitation reaction: The formation of the product is insoluble when the ions combine in the solution is called precipitation reaction.

Acid - base reaction: Formation of the salt from the cation from the base and anion from the acid and formation of water is also the product.

Gas forming reaction: The reaction of acid and metal carbonates which produce carbonic acid. The carbonic acid decomposes which gives water and carbon dioxide.

Oxidation - reduction reaction: The electrons are transferred to one to other is called oxidation reduction reaction.

Explanation

Barium hydroxide is reaction with hydrochloric acid which gives barium chloride, which is shown below.

Ba(OH)2(aq)+ 2HCl(aq)  BaCl2(s)+ 2H2O(l)

Balance the equation,

Balance the chlorine atom in the given equation, when balancing the equation, we should not alter the subscripts and we can change coefficients.  There are two chlorine atoms in the right side and one chlorine atom in the left side.  Therefore two molecule of hydrochloric acid is added to left side of reaction.  Therefore the balanced equation is given below.

Ba(OH)2(aq)+ 2HCl(aq)  BaCl2(s)+ H2O(l)

Balance the hydrogen atom in the given equation, when balancing the equation, we should not alter the subscripts and we can change coefficients.  There are four hydrogen atoms in the left side and two hydrogen atoms in the left side.  Therefore two molecule of water is added to left side of reaction.  Therefore the balanced equation is given below.

Ba(OH)2(aq)+ 2HCl(aq)  BaCl2(s)+ 2H2O(l)

Acid base reaction is shown below,

Ba(OH)2(aq)+ 2HCl(aq)  BaCl2(s)+ 2H2O(l)

Barium carbonate is reaction with sulfuric acid which gives barium sulfate, carbon dioxide and water, which is shown below

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