Chemistry: Structure and Properties Plus MasteringChemistry with eText -- Access Card Package
1st Edition
ISBN: 9780321729736
Author: Nivaldo J. Tro
Publisher: PEARSON
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Chapter 4, Problem 123E
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please solve. If the answer is "no error" and it asks me to type something, and i typed a-helix, its always wrong.
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Part I. Problem solving. Include all necessary calculations 13 provide plots and graphs.
Complexation wl diphenyl carbazide (OPC) in acidic media is another type of sensitive photometric method used for the analysis of aqueous.
hexavalent chromium. At 540nm the cherry-red complex as a result of DPC reaction w/ chromium can be photometrically measured.
at this wavelength.
-
a 25mL
The UV-vis analysis for the determination of nexavalent chromium in ground water sample is given below. The experiment was based
on external calibration method w/ each measurement sample prepared are as follows
lab sample analysis contained the standard
100 ppb croy cor groundwater sample, volumes used as indicated below), 12.50 mL of 0.02 M H2Soy and 5.50 ml of 100 ppm DPC (wi
water to adjust final volume to 25-ml). The main stripping method was square wave voltammetry, following the conditions set
in the main ASV experiment.
Standard 100
Volumetric
Groundwater
H2SO4 0.20 M,
flask
Sample, mL
ppb CrO4*,
100…
Chapter 4 Solutions
Chemistry: Structure and Properties Plus MasteringChemistry with eText -- Access Card Package
Ch. 4 - 1. According to Coulomb's law, if the separation...Ch. 4 - Prob. 2SAQCh. 4 - Choose the correct electron configuration for Se....Ch. 4 - Prob. 4SAQCh. 4 - Which set of four quantum numbers corresponds to...Ch. 4 - Prob. 6SAQCh. 4 - Which statement is true about electron shielding...Ch. 4 - Prob. 8SAQCh. 4 - What is the electron configuration for Fe2+?...Ch. 4 - Which species is diamagnetic? Zn Cr 2+ C Mn
Ch. 4 - Prob. 11SAQCh. 4 - Prob. 12SAQCh. 4 - Prob. 13SAQCh. 4 - Prob. 14SAQCh. 4 - Prob. 15SAQCh. 4 - Prob. 16SAQCh. 4 - What are periodic properties?Ch. 4 - Use aluminum as an example to explain how density...Ch. 4 - Explain the contributions of Dobereiner and...Ch. 4 - Who is credited with arranging the periodic table?...Ch. 4 - Prob. 5ECh. 4 - Prob. 6ECh. 4 - What is an electron configuration? Provide an...Ch. 4 - Prob. 8ECh. 4 - Prob. 9ECh. 4 - What is penetration? How does the penetration of...Ch. 4 - Why are the sublevels within a principal level...Ch. 4 - Prob. 12ECh. 4 - Prob. 13ECh. 4 - What are degenerate orbitals? According to Hund’s...Ch. 4 - List all orbitals from 1s through 5s according to...Ch. 4 - Prob. 16ECh. 4 - Copy this blank periodic table onto a sheet of...Ch. 4 - Explain why the s block in the periodic table has...Ch. 4 - Explain why the rows in the periodic table become...Ch. 4 - Explain the relationship between a main-group...Ch. 4 - Explain the relationship between an element's row...Ch. 4 - Which of the transition elements in the first...Ch. 4 - Explain how to write the electron configuration...Ch. 4 - Explain the relationship between the properties of...Ch. 4 - Prob. 25ECh. 4 - Prob. 26ECh. 4 - What is effective nuclear charge? What is...Ch. 4 - When an alkali metal forms an ion, what is the...Ch. 4 - When a halogen forms an ion, what is the charge of...Ch. 4 - Use the concepts of effective nuclear charge,...Ch. 4 - For transition elements, describe the trends in...Ch. 4 - Prob. 32ECh. 4 - Explain how to write an electron configuration for...Ch. 4 - Prob. 34ECh. 4 - Prob. 35ECh. 4 - Prob. 36ECh. 4 - What are the exceptions to the periodic trends in...Ch. 4 - Prob. 38ECh. 4 - Prob. 39ECh. 4 - What is metallic character? What are the observed...Ch. 4 - Prob. 41ECh. 4 - Prob. 42ECh. 4 - Determine whether each element is a main-group...Ch. 4 - Determine whether each element is a transition...Ch. 4 - Write the full electron configuration for each...Ch. 4 - Prob. 46ECh. 4 - Write the full orbital diagram for each element. N...Ch. 4 - Prob. 48ECh. 4 - Use the periodic table to write the electron...Ch. 4 - Use the periodic table to determine the element...Ch. 4 - Use the periodic table to determine each quantity....Ch. 4 - Use the periodic table to determine each quantity....Ch. 4 - Prob. 53ECh. 4 - Prob. 54ECh. 4 - Determine the number of valence electrons in each...Ch. 4 - Prob. 56ECh. 4 - Which outer electron configuration would you...Ch. 4 - Prob. 58ECh. 4 - Prob. 59ECh. 4 - List the number of valence electrons in each...Ch. 4 - Which pair of elements do you expect to be most...Ch. 4 - Prob. 62ECh. 4 - Predict the charge of the ion formed by each...Ch. 4 - Predict the charge of the ion formed by each...Ch. 4 - According to Coulomb’s law, which pair of charged...Ch. 4 - Prob. 66ECh. 4 - Prob. 67ECh. 4 - Arrange the atoms according to decreasing...Ch. 4 - If core electrons completely shielded valence...Ch. 4 - In Section 3.6/, we estimated the effective...Ch. 4 - Prob. 71ECh. 4 - Choose the larger atom in each pair. Sn or Si Br...Ch. 4 - Arrange these elements in order of increasing...Ch. 4 - Arrange these elements in order of decreasing...Ch. 4 - Write the electron configuration for each ion. O2...Ch. 4 - Write the electron configuration for each ion. Cl...Ch. 4 - Write orbital diagrams for each ion and determine...Ch. 4 - Write orbital diagrams for each ion and determine...Ch. 4 - Which is the larger species in each pair? LiorLi+...Ch. 4 - Which is the larger species in each pair? SrorSr2+...Ch. 4 - Arrange this isoelectronic series in order of...Ch. 4 - Arrange this isoelectronic series in order of...Ch. 4 - Choose the element with the higher first...Ch. 4 - Prob. 84ECh. 4 - Arrange these elements in order of increasing...Ch. 4 - Prob. 86ECh. 4 - For each element, predict where the “jump” occurs...Ch. 4 - Prob. 88ECh. 4 - Choose the element with the more negative (more...Ch. 4 - Prob. 90ECh. 4 - Choose the more metallic element in each pair....Ch. 4 - Prob. 92ECh. 4 - Prob. 93ECh. 4 - Prob. 94ECh. 4 - Prob. 95ECh. 4 - Prob. 96ECh. 4 - Both vanadium and its 3+ ion are paramagnetic. Use...Ch. 4 - Use electron configurations to explain why copper...Ch. 4 - Prob. 99ECh. 4 - Suppose you were trying to find a substitute for...Ch. 4 - Prob. 101ECh. 4 - Which pair of elements would you expect to have...Ch. 4 - Consider these elements: N, Mg, O, F, Al. Write...Ch. 4 - Consider these elements: P, Ca, Si, S, Ga. Write...Ch. 4 - Prob. 105ECh. 4 - Explain why vanadium (radius = 134 pm) and copper...Ch. 4 - The lightest noble gases, such as helium and neon,...Ch. 4 - The lightest halogen is also the most chemically...Ch. 4 - Prob. 109ECh. 4 - Prob. 110ECh. 4 - Prob. 111ECh. 4 - Write the electronic configurations of the six...Ch. 4 - You have cracked a secret code that uses elemental...Ch. 4 - The electron affinity of sodium is lower than that...Ch. 4 - Use Coulomb’s law to calculate the ionization...Ch. 4 - Prob. 116ECh. 4 - Consider the densities and atomic radii of the...Ch. 4 - Prob. 118ECh. 4 - Consider the metals in the first transition...Ch. 4 - Imagine a universe in which the value of ms can be...Ch. 4 - A carbon atom can absorb radiation of various...Ch. 4 - Only trace amounts of the synthetic element...Ch. 4 - What is the atomic number of the as yet...Ch. 4 - The trend in second ionization energy for the...Ch. 4 - Unlike the elements in groups 1A and 2A, those in...Ch. 4 - Using the data in Figures 3.19 and 3.20/,...Ch. 4 - Prob. 127ECh. 4 - Prob. 128ECh. 4 - The heaviest known alkaline earth metal is radium,...Ch. 4 - Predict the electronic configurations of the first...Ch. 4 - Prob. 131ECh. 4 - The outermost valence electron in atom A...Ch. 4 - Prob. 133ECh. 4 - Give a combination of four quantum numbers that...Ch. 4 - Prob. 135E
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- please helparrow_forwardPredict the products of the following reactions. Draw mechanism arrows for each step for a, b, and c. a.) HBr b.) HI H₂O H2SO4 d.) C12 HO H2SO4 1.) BH3 2.) H2O2, NaOHarrow_forwardK for the following reaction is 0.11 at constant temperature. If the equilibrium concentration of HCl is 0.5 M, what is the equilibrium concentration of NH3. NH4CI(s) ⇌ NH3(g) + HCI(g)arrow_forward
- please help by Draw the following structures (Lewis or line-angle drawing).arrow_forwardplease helparrow_forwardConsider the reaction: 2 A (aq) ⇌ B(aq) Given the following KC values and starting with the initial concentration of A = 4.00 M, complete ICE diagram(s)and find the equilibrium concentrations for A and B.A) KC = 4.00B) KC = 200C) KC = 8.00 x10-3arrow_forward
- 5) Consider the reaction: Cl2 (g) + F2 (g) ⟷ 2 ClF (g) KP=? The partial pressure of 203 kPa for Cl2 and a partial pressure of 405 kPa for F2. Upon reaching equilibrium, thepartial pressure of ClF is 180 kPa. Calculate the equilibrium concentrations and then find the value for KP.arrow_forwardDon't used hand raiting and don't used Ai solutionarrow_forward(9 Pts) In one of the two Rare Earth element rows of the periodic table, identify an exception tothe general ionization energy (IE) trend. For the two elements involved, answer the followingquestions. Be sure to cite sources for all physical data that you use.a. (2 pts) Identify the two elements and write their electronic configurations.b. (2 pts) Based on their configurations, propose a reason for the IE trend exception.c. (5 pts) Calculate effective nuclear charges for the last electron in each element and theAllred-Rochow electronegativity values for the two elements. Can any of these valuesexplain the IE trend exception? Explain how (not) – include a description of how IErelates to electronegativity.arrow_forward
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