CHEMISTRY-W/MASTERING CHEMISTRY ACCESS
8th Edition
ISBN: 9780135205068
Author: Robinson
Publisher: PEARSON
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Chapter 4, Problem 4.25P
Identify the oxidizing agent and reducing agent in the reaction:
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Calculating the pH at equivalence of a titration
A chemist titrates 210.0 mL of a 0.1003 M hydrobromic acid (HBr) solution with 0.7550M KOH solution at 25 °C. Calculate the pH at equivalence.
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 = ]
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18
Ar
Do you do chemistry assignments
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
Chapter 4 Solutions
CHEMISTRY-W/MASTERING CHEMISTRY ACCESS
Ch. 4 - Prob. 4.1PCh. 4 - Prob. 4.2ACh. 4 - How many moles of solute are present in 125 mLof...Ch. 4 - Prob. 4.4ACh. 4 - Prob. 4.5PCh. 4 - APPLY 4.7 Sulfuric acid is normally purchased at a...Ch. 4 - Prob. 4.7PCh. 4 - Conceptual APPLY 4.9 Three different substances,...Ch. 4 - Write ne ionic equations for the following...Ch. 4 - Prob. 4.10A
Ch. 4 - Will a precipitation reaction occur when aqueous...Ch. 4 - APPLY 4.13 How might you use a precipitation...Ch. 4 - Conceptual PRACTICE 4.14 An aqueous solution...Ch. 4 - Conceptual APPLY 4.15 A solution containing the...Ch. 4 - Name the acids HI and HBrO2 .Ch. 4 - APPLY 4.17 Give likely chemical formulas...Ch. 4 - PRACTICE 4.18 Write a balanced ionic equation and...Ch. 4 - Milk of magnesia (active ingredient: magnesium...Ch. 4 - Prob. 4.19PCh. 4 - Prob. 4.20ACh. 4 - Prob. 4.21PCh. 4 - Assume that the buret contains H+ ions, the flask...Ch. 4 - PRACTICE 4.24 Assign an oxidation number to each...Ch. 4 - APPLY 4.25 Chlorine can have several different...Ch. 4 - Identify the oxidizing agent and reducing agent in...Ch. 4 - APPLY 4.27 Police often use a Breathalyzer test to...Ch. 4 - PRACTICE 4.28 Predict whether the following...Ch. 4 - Use the following reactions to arrange the...Ch. 4 - Prob. 4.29PCh. 4 - Prob. 4.30ACh. 4 - A viramin-fortified brand of a sports...Ch. 4 - The nutritional label on Power ade specifies that...Ch. 4 - Prob. 4.33PCh. 4 - One way to analyze a sports drink for the...Ch. 4 - To measure the concentration of chloride ions ina...Ch. 4 - The flavor of the first batch of Gatorade was...Ch. 4 - Prob. 4.37CPCh. 4 - Prob. 4.38CPCh. 4 - Assume that an aqueous solution Of a cation,...Ch. 4 - The following pictures represent aqueous solutions...Ch. 4 - Prob. 4.41CPCh. 4 - The concentration of an aqueous solution of NaOCl...Ch. 4 - Assume that the electrical conductivity of a...Ch. 4 - Based on the positions in the periodic table,...Ch. 4 - The following two redox reactions occur between...Ch. 4 - Prob. 4.46SPCh. 4 - How many grams of solute would you use to prepare...Ch. 4 - How many milliliters of a 0.45 M BaCl2 solution...Ch. 4 - How many milliliters of a 0.350 M KOH solution...Ch. 4 - The sterile saline solution used to rinse contact...Ch. 4 - Prob. 4.51SPCh. 4 - Copper reacts with dilute nitric acid according to...Ch. 4 - Prob. 4.53SPCh. 4 - How many grams of solute would you use to prepare...Ch. 4 - Prob. 4.55SPCh. 4 - How would you prepare 250 mL of a 0.100 M solution...Ch. 4 - Pennies minted after 1982 are mostly zinc (97.5%)...Ch. 4 - A bottle of 12.0 M hydrochloric acid has only 35.7...Ch. 4 - What is the volume of the solution that would...Ch. 4 - How would you prepare 250 mL of a 0.100 M solution...Ch. 4 - Prob. 4.61SPCh. 4 - The following aqueous solutions were tested with a...Ch. 4 - Prob. 4.63SPCh. 4 - Individual solutions of Ba(OH)2 and H2SO4 both...Ch. 4 - A solution of HCl in water conducts electricity,...Ch. 4 - Classify each of the following substances as a...Ch. 4 - Is it possible for a molecular substance to be a...Ch. 4 - What is the total molar concentration of ions in...Ch. 4 - What is the total molar concentration of ions in...Ch. 4 - Ringer’s solution, used in the treatment of burns...Ch. 4 - What is the molarity of each ion in a solution...Ch. 4 - Prob. 4.72SPCh. 4 - Prob. 4.73SPCh. 4 - Write net ionic equations for the reactions listed...Ch. 4 - Write net ionic equations for the reactions listed...Ch. 4 - Which of the following substances are likely to be...Ch. 4 - Which of the following substances are likely to be...Ch. 4 - Predict whether a precipitation reaction will...Ch. 4 - Predict whether a precipitation reaction will...Ch. 4 - hich of the following solutions will not form a...Ch. 4 - Which of the following solutions will not form a...Ch. 4 - How would you prepare the following substances by...Ch. 4 - How would you prepare the following substances by...Ch. 4 - What are the mass and the identity of the...Ch. 4 - What are the mass and the identity of the...Ch. 4 - Assume that you have an aqueous mixture of NaNO3...Ch. 4 - Assume that you have an aqueous mixture of BaCl2...Ch. 4 - Assume that you have an aqueous solution of an...Ch. 4 - Assume that you have an aqueous solution of an...Ch. 4 - How could you use a precipitation reaction to...Ch. 4 - How could you u a precipitation reaction to...Ch. 4 - The following three solutions are mixed: 100.0 mL...Ch. 4 - A 250.0 g sample of a white solid is known to be a...Ch. 4 - Assume that you are given a solution of an unknown...Ch. 4 - Why do we use a double arrow () to show the...Ch. 4 - Write balanced ionic equations for the following...Ch. 4 - Write balanced ionic equations for the following...Ch. 4 - Write balanced net ionic equations for the...Ch. 4 - Write balanced net ionic equations for the...Ch. 4 - A flask containing 450 mL of 0.500 M HBr was...Ch. 4 - The odor of skunks is caused by chemical compounds...Ch. 4 - Prob. 4.102SPCh. 4 - Prob. 4.103SPCh. 4 - How many milliliters of 1.00 M KOH must be added...Ch. 4 - How many milliliters of 2.00 M HCl must be added...Ch. 4 - If the following solutions are mixed, is the...Ch. 4 - If the following solutions are mixed, is the...Ch. 4 - Prob. 4.108SPCh. 4 - Assign oxidation numbers to each element in the...Ch. 4 - Assign oxidation numbers to each element in the...Ch. 4 - Assign oxidation numbers to each element in the...Ch. 4 - Nitrogen can have several different oxidation...Ch. 4 - Prob. 4.113SPCh. 4 - Prob. 4.114SPCh. 4 - Where in the periodic table are the most easily...Ch. 4 - In each of the following instances, tell whether...Ch. 4 - Tell for each of the following substances whether...Ch. 4 - Which element is oxidized and which is reduced in...Ch. 4 - Which element is oxidized and which is reduced in...Ch. 4 - Use the activity series of metals (Table 4.5) to...Ch. 4 - Neither strontium (Sr) nor antimony (Sb) is shown...Ch. 4 - (a) Use the following reactions to arrange the...Ch. 4 - Prob. 4.123SPCh. 4 - Iodine, I2 , reacts with aqueous thiosulfate ion...Ch. 4 - How many milliliters of 0.250MNa2S2O3 solution is...Ch. 4 - Dichromate ion, Cr2O72 reacts with aqueous...Ch. 4 - A volume of 18.72 mL of 0.1500MK2Cr2O7 solution...Ch. 4 - What is the molar concentration of As(III) in a...Ch. 4 - Standardized solutions of KBrO3 are frequently...Ch. 4 - The metal content of iron in ores can be...Ch. 4 - Prob. 4.131SPCh. 4 - Alcohol levels in blood can he determined by a...Ch. 4 - Calcium levels in blood can be determined by...Ch. 4 - Assume that you have 1.00 g of a mixture of...Ch. 4 - A compound with the formula XOCl2 , reacts with...Ch. 4 - Prob. 4.136MPCh. 4 - Some metals occur naturally in their elemental...Ch. 4 - A sample weighing 14.98 g and containing a small...Ch. 4 - The solubility of an ionic compound can be...Ch. 4 - Prob. 4.140MPCh. 4 - Prob. 4.141MPCh. 4 - Prob. 4.142MPCh. 4 - A sample of metal (M) reacted with both steam and...Ch. 4 - Prob. 4.144MPCh. 4 - Prob. 4.145MPCh. 4 - Iron content in ores can be determined by a redox...Ch. 4 - Prob. 4.147MPCh. 4 - Salicylic acid, used in the manufacture of...Ch. 4 - Compound X contains only the elements C, H, O, and...Ch. 4 - Prob. 4.150MPCh. 4 - Element M is prepared industrially by a two-step...Ch. 4 - Prob. 4.152MPCh. 4 - Four solutions are prepared and mixed in the...Ch. 4 - To 100.0 mL of a solution that contains 0.120MCr(...Ch. 4 - Sodium nitrite, NaNO2 , is frequently added to...Ch. 4 - Brass is an approximately 4:1 alloy of copper and...Ch. 4 - Prob. 4.157MPCh. 4 - Prob. 4.158MP
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- The aim of the lab is to measure the sodium content from tomato sauce using the Mohr titration method. There are two groups being: Regular Tomato sauce & Salt Reduced tomato sauce QUESTION: State how you would prepare both Regular & Salt reduced tomato sauce samples for chemical analysis using the Mohr titration methodarrow_forwardUsing 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_forward
- Decide 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_forwardUse 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 ΔΗ is (pick one) A This reaction is faster above 103. °C than below. AS is (pick one) ΔΗ is (pick one) B This reaction is spontaneous only above -9. °C. AS is (pick one) ΔΗ is (pick one) C The reverse of this reaction is always spontaneous. AS is (pick one) 18 Ararrow_forwardUse 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 slower at temperatures below 41. °C. ΔΗ is (pick one) AS is (pick one) ΔΗ is (pick one) B This reaction is spontaneous except above 94. °C. AS is (pick one) This reaction is always spontaneous, but ΔΗ is (pick one) C proceeds slower at temperatures below −14. °C. AS is (pick one) Х 00. 18 Ar 무ㅎ B 1 1arrow_forward
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