CHEMISTRY: AN INTRODUCTION TO GENERAL, O
13th Edition
ISBN: 9780137444298
Author: Timberlake
Publisher: PEARSON
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Chapter 4, Problem 4.85UTC
Interpretation Introduction
To Determine: Atomic symbols and isotopes of the given representations.
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Using the conditions of spontaneity to deduce the signs of AH and AS
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy
AS.
Note: if you have not been given enough information to decide a sign, select the "unknown" option.
reaction
observations
conclusions
A
This reaction is always spontaneous, but
proceeds slower at temperatures above
120. °C.
ΔΗ is
(pick one)
AS is
(pick one)
ΔΗ is
(pick one)
B
This reaction is spontaneous except above
117. °C.
AS is
(pick one)
ΔΗ is
(pick one)
This reaction is slower below 20. °C than
C
above.
AS is
|(pick one)
?
18
Ar
1
Calculating the pH at equivalence of a titration
Try Again
Your answer is incorrect.
0/5
a
A chemist titrates 70.0 mL of a 0.7089 M hydrocyanic acid (HCN) solution with 0.4574M KOH solution at 25 °C. Calculate the pH at equivalence. The pK of
hydrocyanic acid is 9.21.
Round your answer to 2 decimal places.
Note for advanced students: you may assume the total volume of the solution equals the initial volume plus the volume of KOH solution added.
pH
=
11.43]
G
00.
18
Ar
B•
Chapter 4 Solutions
CHEMISTRY: AN INTRODUCTION TO GENERAL, O
Ch. 4.1 - Write the symbols for the following elements. a....Ch. 4.1 - Prob. 4.2PPCh. 4.1 - 4.3 Write the name for the symbol of each of the...Ch. 4.1 - Prob. 4.4PPCh. 4.1 - Prob. 4.5PPCh. 4.1 - Prob. 4.6PPCh. 4.2 - 4.7 Identify the group or period number described...Ch. 4.2 - 4.8 Identify the group or period number described...Ch. 4.2 - Prob. 4.9PPCh. 4.2 - 4.10 Give the symbol of the element described by...
Ch. 4.2 - Prob. 4.11PPCh. 4.2 - Identify each of the following elements as a...Ch. 4.2 - Prob. 4.13PPCh. 4.2 - 4.14 Using TABLE 4.4, identify the function of...Ch. 4.2 - Prob. 4.15PPCh. 4.2 - Prob. 4.16PPCh. 4.3 - Identify each of the following as describing...Ch. 4.3 - 4.18 Identify each of the following as describing...Ch. 4.3 - What did Rutherford determine about the structure...Ch. 4.3 - 4.20 How did Thomson determine that the electrons...Ch. 4.3 - Prob. 4.21PPCh. 4.3 - Is each of the following statements true or false?...Ch. 4.3 - Prob. 4.23PPCh. 4.3 - 4.24 Sometimes clothes cling together when...Ch. 4.4 - 4.25 Would you use the atomic number, mass...Ch. 4.4 - 4.26 Identify the type of subatomic particles...Ch. 4.4 - Prob. 4.27PPCh. 4.4 - Prob. 4.28PPCh. 4.4 - Prob. 4.29PPCh. 4.4 - Prob. 4.30PPCh. 4.4 - Complete the following table for atoms of...Ch. 4.4 - Prob. 4.32PPCh. 4.5 - What are the number of protons, neutrons, and...Ch. 4.5 - 4.34 What are the number of protons, neutrons, and...Ch. 4.5 - Write the atomic symbol for the isotope with each...Ch. 4.5 - Prob. 4.36PPCh. 4.5 - Argon has three naturally occurring isotopes, with...Ch. 4.5 - Strontium has four naturally occurring isotopes,...Ch. 4.5 - Prob. 4.39PPCh. 4.5 - 4.40 Two isotopes of rubidium occur naturally, ...Ch. 4.5 - Prob. 4.41PPCh. 4.5 - Prob. 4.42PPCh. 4.5 - There are two naturally occurring isotopes of...Ch. 4.5 - There are five naturally occurring isotopes of...Ch. 4.6 - Electrons can move to higher energy levels when...Ch. 4.6 - Prob. 4.46PPCh. 4.6 - Prob. 4.47PPCh. 4.6 - Prob. 4.48PPCh. 4.6 - Prob. 4.49PPCh. 4.6 - 4.50 Write the electron arrangement for each of...Ch. 4.6 - Prob. 4.51PPCh. 4.6 - Prob. 4.52PPCh. 4.7 - What is the group number and number of valence...Ch. 4.7 - 4.54 What is the group number and number of...Ch. 4.7 - Prob. 4.55PPCh. 4.7 - Write the group number and draw the Lewis symbol...Ch. 4.7 - Prob. 4.57PPCh. 4.7 - Prob. 4.58PPCh. 4.7 - Prob. 4.59PPCh. 4.7 - Prob. 4.60PPCh. 4.7 - Prob. 4.61PPCh. 4.7 - 4.62 Select the element in each pair with the...Ch. 4.7 - Prob. 4.63PPCh. 4.7 - Prob. 4.64PPCh. 4.7 - Prob. 4.65PPCh. 4.7 - Prob. 4.66PPCh. 4.7 - Prob. 4.67PPCh. 4.7 - Prob. 4.68PPCh. 4.7 - Prob. 4.69PPCh. 4.7 - 4.70 Fill in the following blanks using higher or...Ch. 4.7 - Prob. 4.71PPCh. 4.7 - Prob. 4.72PPCh. 4.7 - Prob. 4.73PPCh. 4.7 - 4.74 Which statements completed with a to e will...Ch. 4.7 - a. What is the group number and name of the group...Ch. 4.7 - a. How many neutrons are in K-41? b. Write the...Ch. 4 - Prob. 4.77UTCCh. 4 - Use Rutherford’s gold-foil experiment to answer...Ch. 4 - Prob. 4.79UTCCh. 4 - Prob. 4.80UTCCh. 4 - Prob. 4.81UTCCh. 4 - Prob. 4.82UTCCh. 4 - Prob. 4.83UTCCh. 4 - Prob. 4.84UTCCh. 4 - Prob. 4.85UTCCh. 4 - Prob. 4.86UTCCh. 4 - Match the spheres A through D with atoms of Li,...Ch. 4 - Prob. 4.88UTCCh. 4 - Prob. 4.89UTCCh. 4 - Of the elements Sn, Xe, Te, Sr, I, and Rb,...Ch. 4 - Prob. 4.91APPCh. 4 - Prob. 4.92APPCh. 4 - Prob. 4.93APPCh. 4 - Prob. 4.94APPCh. 4 - Prob. 4.95APPCh. 4 - Prob. 4.96APPCh. 4 - Prob. 4.97APPCh. 4 - Write the name and symbol of the element with the...Ch. 4 - Prob. 4.99APPCh. 4 - Prob. 4.100APPCh. 4 - Prob. 4.101APPCh. 4 - Prob. 4.102APPCh. 4 - Prob. 4.103APPCh. 4 - Prob. 4.104APPCh. 4 - Prob. 4.105APPCh. 4 - Prob. 4.106APPCh. 4 - Prob. 4.107APPCh. 4 - Prob. 4.108APPCh. 4 - Why is the ionization energy of Ca higher than K,...Ch. 4 - Prob. 4.110APPCh. 4 - Prob. 4.111APPCh. 4 - Of the elements F, Br, Cl, and I, which (4.7) a....Ch. 4 - Prob. 4.113CPCh. 4 - Prob. 4.114CPCh. 4 - Prob. 4.115CPCh. 4 - Prob. 4.116CP
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- Using the conditions of spontaneity to deduce the signs of AH and AS Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions A The reverse of this reaction is always spontaneous but proceeds faster at temperatures above -48. °C. ΔΗ is (pick one) ✓ AS is (pick one) B This reaction is spontaneous except below 114. °C but proceeds at a slower rate below 135. °C. ΔΗ is (pick one) AS is (pick one) ΔΗ is C This reaction is exothermic and proceeds faster at temperatures above -43. °C. (pick one) AS is (pick one) v Х 5 ? 18 Ararrow_forwardion. A student proposes the following Lewis structure for the perchlorate (CIO) io : :0: : Cl : - - : :0: ك Assign a formal charge to each atom in the student's Lewis structure. atom central O formal charge ☐ top O ☐ right O ☐ bottom O ☐ Cl ☐arrow_forwardDecide whether these proposed Lewis structures are reasonable. proposed Lewis structure Yes. Is the proposed Lewis structure reasonable? Cl- : 2: :Z: :Z: N—N : 0: C C1: O CO No, it has the wrong number of valence electrons. The correct number is: ☐ No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* ☐ Yes. No, it has the wrong number of valence electrons. The correct number is: ☐ No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* | Yes. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* | If two or more atoms of the same element don't satisfy the octet rule, just enter the chemical symbol as many times as necessary. For example, if two oxygen atoms don't satisfy the octet rule, enter "0,0". ☑arrow_forward
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