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Chemistry & Chemical Reactivity

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

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

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

Identify the ions that exist in each aqueous solution, and specify the concentration of each ion.

(a) 0.12 M BaCl2

(b) 0.0125 M CuSO4

(c) 0.500 M K2Cr2O7

(a)

Interpretation Introduction

Interpretation:

The ions exist in aqueous solution of 0.12 M BaCl2 and concentration of each ion has to be determined.

Concept introduction:

  • Concentration of solutions can be expressed in various terms; molarity is one such concentration expressing term.
  • Molarity (M) of a solution is the number of gram moles of a solute present in one liter of the solution.

  Molarity=NumberofmolesofelementVolumeofsolutioninlitres

  • A solution containing one gram mole or 0.1 gram of solute per litre of solution is called molar solution.
  • Amount of substance (mol) can be determined by using the equation,

  Numberofmole=GivenmassofthesubstanceMolarmass

  • The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mol (g/mol).
  • For chemical reaction balanced chemical reaction equation written in accordance with the Law of conservation of mass.
  • Law of conservation of mass states that for a reaction total mass of the reactant and product must be equal.
Explanation

One mole of BaCl2 compound dissociates into one mole of Ba2+ and 2molofCl- ions in solution.

  BaCl2Ba2++2Cl-

So the ions that exist in 0.12MBaCl2 aqueous solution are Ba2+ and Cl-

Molar concentration of barium ion [Ba2+]= 1×0

(b)

Interpretation Introduction

Interpretation:

The ions exist in aqueous solution of 0.0125 M CuSO4 and concentration of each ion has to be determined.

Concept introduction:

  • Concentration of solutions can be expressed in various terms; molarity is one such concentration expressing term.
  • Molarity (M) of a solution is the number of gram moles of a solute present in one liter of the solution.

  Molarity=NumberofmolesofelementVolumeofsolutioninlitres

  • A solution containing one gram mole or 0.1 gram of solute per litre of solution is called molar solution.
  • Amount of substance (mol) can be determined by using the equation,

  Numberofmole=GivenmassofthesubstanceMolarmass

  • The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mol (g/mol).
  • For chemical reaction balanced chemical reaction equation written in accordance with the Law of conservation of mass.
  • Law of conservation of mass states that for a reaction total mass of the reactant and product must be equal.

(c)

Interpretation Introduction

Interpretation:

The ions exist in aqueous solution of 0.500 M K2Cr2O7 and concentration of each ion has to be determined.

Concept introduction:

  • Concentration of solutions can be expressed in various terms; molarity is one such concentration expressing term.
  • Molarity (M) of a solution is the number of gram moles of a solute present in one liter of the solution.

  Molarity=NumberofmolesofelementVolumeofsolutioninlitres

  • A solution containing one gram mole or 0.1 gram of solute per litre of solution is called molar solution.
  • Amount of substance (mol) can be determined by using the equation,

  Numberofmole=GivenmassofthesubstanceMolarmass

  • The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mol (g/mol).
  • For chemical reaction balanced chemical reaction equation written in accordance with the Law of conservation of mass.
  • Law of conservation of mass states that for a reaction total mass of the reactant and product must be equal.

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