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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) 0.25 M(NH4)2SO4

(b) 0.123 M Na2CO3

(c) 0.056 M HNO3

(a)

Interpretation Introduction

Interpretation:

The ions that exist in aqueous solution of 0.25 M (NH4)2SO4 has to be determined.  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 (NH4)2SO4 compound contains two moles of NH4+ and 1molofSO42-.  In solution the compound dissociates and the balanced chemical reaction equation for this can be written as,

  (NH4)2SO42NH4++SO42-

So the ions that exist in the 0

(b)

Interpretation Introduction

Interpretation:

The ions that exist in aqueous solution of 0.123 M Na2CO3 has to be determined.  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 that exist in aqueous solution of 0.056 M HNO3 has to be determined.  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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