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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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Chapter
Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

When solutions of BaCl2 and Na2SO4 are mixed, the mixture becomes cloudy. After a few days, a white solid is observed on the bottom of the beaker with a clear liquid above it.

  1. (a) Write a balanced equation for the reaction that occurs.
  2. (b) Why is the solution cloudy at first?
  3. (c) What happens during the few days of waiting?

(a)

Interpretation Introduction

Interpretation: The balanced equation for the reaction when solutions of BaCl2andNa2SO4 are mixed has to be determined.

Concept introduction:

  • Colloids: It is a homogeneous particle where one of the substances is dispersed throughout the other substance.
  • Chemical equation is the representation of a chemical reaction where the reactants and products of the reactions are represented on left and right side of an arrow respectively by using their respective chemical formulas. It follows conservation law of mass where the number of atoms of each element is equal for reactants and products.
Explanation

BaCl2 and Na2SO4 are mixed together results in the formation of BaSO4 and NaCl. The number of sodium and chlorine are made equal by giving appropriate coefficient. Therefore the balanced equation for the given reaction is,

  BaCl2(aq)+x

(b)

Interpretation Introduction

Interpretation: The reason for the solution to become cloudy at first has to be determined.

Concept introduction:

  • Colloids: It is a homogeneous particle where one of the substances is dispersed throughout the other substance.
  • Chemical equation is the representation of a chemical reaction where the reactants and products of the reactions are represented on left and right side of an arrow respectively by using their respective chemical formulas. It follows conservation law of mass where the number of atoms of each element is equal for reactants and products.

(c)

Interpretation Introduction

Interpretation: The change for the solution after waiting for few days has to be determined.

Concept introduction:

  • Colloids: It is a homogeneous particle where one of the substances is dispersed throughout the other substance.
  • Chemical equation is the representation of a chemical reaction where the reactants and products of the reactions are represented on left and right side of an arrow respectively by using their respective chemical formulas. It follows conservation law of mass where the number of atoms of each element is equal for reactants and products.

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