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Introductory Chemistry: A Foundati...

8th Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781285199030

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

8th Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781285199030
Chapter 15, Problem 56QAP
Textbook Problem
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56. Calculate the new molarity (hat results when 250. mL of water is added to each of the following solutions.

a. 125 mLof0.251 M HCl

b. 445 mL of 0.499 M H2SO4

c. 5.25 L of 0.101 M HNO1

d. 11.2 mL of 14.5 M H2CH3O2

Interpretation Introduction

(a)

Interpretation:

The new molarity after the addition of water is to be calculated.

Concept Introduction:

The atomic mass of an element is defined as the sum of number of protons and number of neutrons. Molar mass of an element is determined from atomic mass of an element.

The number of moles is calculated by the formula,

Moles=MassgMolarmass

The molarity is calculated by the formula,

Molarity=NumberofmolesofsoluteVolumeofsolution.

Explanation of Solution

The initial volume and molarity of HCl solution is given to be 125mL and 0.251M respectively.

The conversion of units of 125mL into L is done as,

125mL=12501000L=0.125L

The number of moles of a solute is calculated by the formula,

Numberofmolesofsolute=Volumeofsolution×Molarity        (1)

Substitute the values of initial volume and molarity of HCl solution in the equation (1).

Numberofmolesofsolute=0.125L×0.251M=0.0314moles

It is given that 250.0mL of water is added in the given solution. During the dilution, the amount of the solute particles in initial and final solution remains same, only the amount of solvent gets changed.

The conversion of units of 250.0mL into L is done as,

250.0mL=250

Interpretation Introduction

(b)

Interpretation:

The new molarity after the addition of water is to be calculated.

Concept Introduction:

The atomic mass of an element is defined as the sum of number of protons and number of neutrons. Molar mass of an element is determined from atomic mass of an element.

The number of moles is calculated by the formula,

Moles=MassgMolarmass

The molarity is calculated by the formula,

Molarity=NumberofmolesofsoluteVolumeofsolution.

Interpretation Introduction

(c)

Interpretation:

The new molarity after the addition of water is to be calculated.

Concept Introduction:

The atomic mass of an element is defined as the sum of number of protons and number of neutrons. Molar mass of an element is determined from atomic mass of an element.

The number of moles is calculated by the formula,

Moles=MassgMolarmass

The molarity is calculated by the formula,

Molarity=NumberofmolesofsoluteVolumeofsolution.

Interpretation Introduction

(d)

Interpretation:

The new molarity after the addition of water is to be calculated.

Concept Introduction:

The atomic mass of an element is defined as the sum of number of protons and number of neutrons. Molar mass of an element is determined from atomic mass of an element.

The number of moles is calculated by the formula,

Moles=MassgMolarmass

The molarity is calculated by the formula,

Molarity=NumberofmolesofsoluteVolumeofsolution.

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Chapter 15 Solutions

Introductory Chemistry: A Foundation
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Ch. 15.8 - ercise 15.10 Calculate the normality of a solution...Ch. 15.8 - Exercise 15.11 What volume of 0.50 N H2SO4 is...Ch. 15 - ou have a solution of table sail in water. What...Ch. 15 - onsider a sugar solution (solution A) with...Ch. 15 - You need to make 150.0 mL of a 0.10 M NaCI...Ch. 15 - ou have two solutions containing solute A. To...Ch. 15 - m>5. Which of the following do you need to know to...Ch. 15 - onsider separate aqueous solutions of HCI and...Ch. 15 - raw molecular-level pictures to differentiate...Ch. 15 - an one solution have a greater concentration than...Ch. 15 - xplain why the formula M1V1= M2V2works when...Ch. 15 - You have equal masses of different solutes...Ch. 15 - Which of the following solutions contains the...Ch. 15 - As with all quantitative problems in chemistry,...Ch. 15 - The figures below are molecular-level...Ch. 15 - The drawings below represent aqueous solutions....Ch. 15 - solution is a homogeneous mixture. Can you give an...Ch. 15 - ow do the properties of a nonhomogeneous...Ch. 15 - uppose you dissolved a teaspoon of sugar in a...Ch. 15 - n a solution, the substance present in the largest...Ch. 15 - n Chapter 14. you learned that the bonding forces...Ch. 15 - n oil spill spreads out on the surface of water,...Ch. 15 - . 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Describe the steps...Ch. 15 - To prepare 500. mL of 1.02 M sugar solution, which...Ch. 15 - 33. For each of the following solutions, the...Ch. 15 - 34. For each of the following solutions, the...Ch. 15 - 35. For each of the following solutions, the mass...Ch. 15 - 36. For each of the following solutions, the mass...Ch. 15 - 37. A laboratory assistant needs to prepare 225 mL...Ch. 15 - 38. How many grams of formaldehyde are in 113.1 mL...Ch. 15 - 39. Standard solutions of calcium ion used to test...Ch. 15 - 40. An alcoholic iodine solution (“tincture” of...Ch. 15 - 41. If 42.5 g of NaOH is dissolved in water and...Ch. 15 - 42. Standard silver nitrate solutions are used in...Ch. 15 - 43. How many moles of the indicated solute does...Ch. 15 - 44. How many moles of the Indicated solute does...Ch. 15 - 45. What mass of the indicated solute does each of...Ch. 15 - 46. What mass of the indicated solute does each of...Ch. 15 - 47. What mass of NaOH pellets is required to...Ch. 15 - 48. What mass of solute is present in 225 mL of...Ch. 15 - 49. Calculate the number of moles of the indicated...Ch. 15 - 50. Calculate the number of moles of each ion...Ch. 15 - 51. An experiment calls for 125 mL of 0.105 M NaCl...Ch. 15 - Strong acid solutions may have their concentration...Ch. 15 - 53. When a concentrated stock solution is diluted...Ch. 15 - 54. When the volume of a given solution is tripled...Ch. 15 - 55. Calculate the new molanty if each of the...Ch. 15 - 56. Calculate the new molarity (hat results when...Ch. 15 - 57. Many laboratories keep bottles of 3.0 M...Ch. 15 - 58. For convenience, one form of sodium hydroxide...Ch. 15 - 59. How would you prepare 275 mL of 0.350 M NaCl...Ch. 15 - 60. Suppose 325 in L of 0.150 M NaOH is needed for...Ch. 15 - 61. How much water must be added w 500. mL of...Ch. 15 - An experiment calls for 100. mL of 1.25 M HC1. All...Ch. 15 - 63. The amount of nickel(II) present in an aqueous...Ch. 15 - 64. 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For each of the following solutions, the mass...Ch. 15 - 81. Calculate the normality of each of the...Ch. 15 - 82. Calculate the normality of each of the...Ch. 15 - 83. A solution of phosphoric acid, H3PO4, is found...Ch. 15 - 84. A solution of the sparingly soluble base...Ch. 15 - 85. How many milliliters of 0.50 N NaOH are...Ch. 15 - 86. What volume of 0.104 N H2SO4is required to...Ch. 15 - 87. What volume of 0.151 N NaOH is required to...Ch. 15 - 88. Suppose that 27.34 mL of standard 0.1021 M...Ch. 15 - 89. A mixture is prepared by mixing 50.0 g of...Ch. 15 - 90. Explain the difference in meaning between the...Ch. 15 - 91. Suppose 50.0 mL of 0.250 M CoCl2 solution is...Ch. 15 - 92. If 500. g of water is added to 75 g of 25%...Ch. 15 - 93. Calculate the mass of AgCl formed, and the...Ch. 15 - 94. Baking soda (sodium hydrogen carbonate....Ch. 15 - 95. Many metal ions form insoluble sulfide...Ch. 15 - 96. Strictly speaking, the solvent is the...Ch. 15 - 97. 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What do we mean when we say that “like...Ch. 15 - The concentration of a solution of HCl is 33. 1 %...Ch. 15 - An experiment calls for 1.00 g of silver nitrate,...Ch. 15 - You mix 225.0 mL of a 2.5 M HCl solution with...Ch. 15 - A solution is 0.1% by mass calcium chloride....Ch. 15 - Calculate the mass, in grams, of NaCl present in...Ch. 15 - A 15.0% (by mass) NaCl solution is available....Ch. 15 - A certain grade of steel is made by dissolving 5.0...Ch. 15 - A sugar solution is prepared in such a way that it...Ch. 15 - How many grams of Na2CO3 are contained in 500. g...Ch. 15 - What mass of KNO3 is required to prepare 125 g of...Ch. 15 - A solution contains 7.5% by mass NaCl and 2.5% by...Ch. 15 - How many moles of each ion are present in 11.7 mL...Ch. 15 - For each of the following solutions, the number of...Ch. 15 - For each of the following solutions, the mass of...Ch. 15 - mg src=Images/HTML_99030-15-114AP_image001.jpg...Ch. 15 - Concentrated hydrochloric acid is made by pumping...Ch. 15 - A large beaker contains 1.50 L of a 2.00 M...Ch. 15 - How many moles of the indicated solute does each...Ch. 15 - How many moles and how many grains of the...Ch. 15 - If 10. g of AgNO3 is available, what volume of...Ch. 15 - Calculate the number of moles of each ion present...Ch. 15 - Calcium carbonate, CaCO3, can be obtained in a...Ch. 15 - Calculate the new molarity when 150. mL of water...Ch. 15 - How many milliliters of 18.0 M H2SO4 are required...Ch. 15 - When 50. mL of 5.4 M NaCl is diluted to a final...Ch. 15 - When 10. 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Calculate the molarities of the solutions...Ch. 15 - 37. Calculate the volume (in milliliters) of each...Ch. 15 - 38. If 125 mL of concentrated sulfuric acid...

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