CHEMISTRY (LL) W/CNCT >BI<
13th Edition
ISBN: 9781260572384
Author: Chang
Publisher: MCG
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Chapter 20, Problem 20.54QP
The safety limits of ozone and carbon monoxide are 120 ppb by volume and 9 ppm by volume, respectively. Why does ozone have a lower limit?
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Using reaction free energy to predict equilibrium composition
Consider the following equilibrium:
2NO(g) +Cl₂ (g) = 2NOC1 (g) AGº = -41. kJ
Now suppose a reaction vessel is filled with 8.90 atm of chlorine (C12) and 5.71 atm of nitrosyl chloride (NOC1) at 1075. °C. Answer the following questions
about this system:
rise
Under these conditions, will the pressure of NOCI tend to rise or fall?
x10
fall
Is it possible to reverse this tendency by adding NO?
In other words, if you said the pressure of NOCI will tend to rise, can that
be changed to a tendency to fall by adding NO? Similarly, if you said the
pressure of NOCI will tend to fall, can that be changed to a tendency to
rise by adding NO?
yes
no
If you said the tendency can be reversed in the second question, calculate
the minimum pressure of NO needed to reverse it.
Round your answer to 2 significant digits.
atm
☑
18
Ar
Identifying the major species in weak acid or weak base equilibria
The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at
equilibrium. You can leave out water itself.
Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the
formulas of the species that will act as neither acids nor bases in the 'other' row.
You will find it useful to keep in mind that HCN is a weak acid.
acids:
0.29 mol of NaOH is added
to 1.0 L of a 1.2M HCN
solution.
bases:
☑
other:
0.09 mol of HCl is added to
acids:
1.0 L of a solution that is
bases:
0.3M in both HCN and
KCN.
other:
0,0,...
?
00.
18
Ar
日
Identifying the major species in weak acid or weak base equilibria
The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at
equilibrium. You can leave out water itself.
Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the
formulas of the species that will act as neither acids nor bases in the 'other' row.
You will find it useful to keep in mind that HF is a weak acid.
acids:
0.2 mol of KOH is added to
1.0 L of a 0.5 M HF
solution.
bases:
Х
other: ☐
acids:
0.10 mol of HI is added to
1.0 L of a solution that is
1.4M in both HF and NaF.
bases:
other: ☐
0,0,...
ด
?
18
Ar
Chapter 20 Solutions
CHEMISTRY (LL) W/CNCT >BI<
Ch. 20.2 - Calculate the wavelength (in nm) of a photon...Ch. 20.5 - Prob. 2PECh. 20.5 - Prob. 1RCFCh. 20.8 - Prob. 3PECh. 20 - Prob. 20.1QPCh. 20 - Prob. 20.2QPCh. 20 - Prob. 20.3QPCh. 20 - Prob. 20.4QPCh. 20 - Prob. 20.5QPCh. 20 - Prob. 20.6QP
Ch. 20 - Prob. 20.7QPCh. 20 - Prob. 20.8QPCh. 20 - Prob. 20.9QPCh. 20 - Prob. 20.10QPCh. 20 - Prob. 20.11QPCh. 20 - The green color observed in aurora borealis is...Ch. 20 - Prob. 20.13QPCh. 20 - Prob. 20.14QPCh. 20 - Prob. 20.15QPCh. 20 - Prob. 20.16QPCh. 20 - Prob. 20.17QPCh. 20 - Prob. 20.18QPCh. 20 - Prob. 20.19QPCh. 20 - Prob. 20.20QPCh. 20 - Prob. 20.21QPCh. 20 - Prob. 20.22QPCh. 20 - Prob. 20.23QPCh. 20 - Prob. 20.24QPCh. 20 - Prob. 20.25QPCh. 20 - Prob. 20.26QPCh. 20 - Prob. 20.27QPCh. 20 - Prob. 20.28QPCh. 20 - Prob. 20.29QPCh. 20 - Prob. 20.30QPCh. 20 - Prob. 20.31QPCh. 20 - Prob. 20.32QPCh. 20 - Prob. 20.33QPCh. 20 - Prob. 20.34QPCh. 20 - Prob. 20.35QPCh. 20 - Prob. 20.36QPCh. 20 - Prob. 20.37QPCh. 20 - Prob. 20.38QPCh. 20 - Prob. 20.39QPCh. 20 - Calcium oxide or quicklime (CaO) is used in...Ch. 20 - The molar heat capacity of a diatomic molecule is...Ch. 20 - Prob. 20.42QPCh. 20 - Prob. 20.43QPCh. 20 - List three detrimental effects of acid rain.Ch. 20 - Briefly discuss two industrial processes that lead...Ch. 20 - Discuss ways to curb acid rain.Ch. 20 - Prob. 20.47QPCh. 20 - Describe the removal of SO2 by CaO (to form CaSO3)...Ch. 20 - Prob. 20.49QPCh. 20 - Prob. 20.50QPCh. 20 - Prob. 20.51QPCh. 20 - Prob. 20.52QPCh. 20 - Identify the gas that is responsible for the brown...Ch. 20 - The safety limits of ozone and carbon monoxide are...Ch. 20 - Prob. 20.55QPCh. 20 - In which region of the atmosphere is ozone...Ch. 20 - Assume that the formation of nitrogen dioxide:...Ch. 20 - The gas-phase decomposition of peroxyacetyl...Ch. 20 - On a smoggy day in a certain city the ozone...Ch. 20 - Which of the following settings is the most...Ch. 20 - Prob. 20.61QPCh. 20 - Prob. 20.62QPCh. 20 - Prob. 20.63QPCh. 20 - Prob. 20.64QPCh. 20 - A concentration of 8.00 102 ppm by volume of CO...Ch. 20 - Prob. 20.66QPCh. 20 - Briefly describe the harmful effects of the...Ch. 20 - The equilibrium constant (KP) for the reaction is...Ch. 20 - As stated in the chapter, carbon monoxide has a...Ch. 20 - Instead of monitoring carbon dioxide, suggest...Ch. 20 - In 1991 it was discovered that nitrous oxide (N2O)...Ch. 20 - A glass of water initially at pH 7.0 is exposed to...Ch. 20 - A 14-m by 10-m by 3.0-m basement had a high radon...Ch. 20 - Ozone in the troposphere is formed by the...Ch. 20 - Prob. 20.75QPCh. 20 - Prob. 20.76QPCh. 20 - A person was found dead of carbon monoxide...Ch. 20 - The carbon dioxide level in the atmosphere today...Ch. 20 - What is funny about the following cartoon?Ch. 20 - Calculate the standard enthalpy of formation (Hf )...Ch. 20 - Prob. 20.81QPCh. 20 - Prob. 20.82QPCh. 20 - Prob. 20.83QPCh. 20 - Peroxyacetyl nitrate (PAN) undergoes thermal...Ch. 20 - How are past temperatures determined from ice...Ch. 20 - The balance between SO2 and SO3 is important in...Ch. 20 - Prob. 20.87QPCh. 20 - The HO3 radical was once thought of as a temporary...Ch. 20 - What is the difference between weather and...Ch. 20 - Estimate the annual production of carbon dioxide...
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- Identifying the major species in weak acid or weak base equilibria The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at equilibrium. You can leave out water itself. Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the formulas of the species that will act as neither acids nor bases in the 'other' row. You will find it useful to keep in mind that NH3 is a weak base. acids: ☐ 1.8 mol of HCl is added to 1.0 L of a 1.0M NH3 bases: ☐ solution. other: ☐ 0.18 mol of HNO3 is added to 1.0 L of a solution that is 1.4M in both NH3 and NH₁Br. acids: bases: ☐ other: ☐ 0,0,... ? 000 18 Ar B 1arrow_forwardUsing reaction free energy to predict equilibrium composition Consider the following equilibrium: 2NH3 (g) = N2 (g) +3H₂ —N2 (g) AGº = 34. kJ Now suppose a reaction vessel is filled with 4.19 atm of ammonia (NH3) and 9.94 atm of nitrogen (N2) at 378. °C. Answer the following questions about this system: rise Under these conditions, will the pressure of NH 3 tend to rise or fall? ☐ x10 fall Х Is it possible to reverse this tendency by adding H₂? In other words, if you said the pressure of NH 3 will tend to rise, can that be changed to a tendency to fall by adding H₂? Similarly, if you said the pressure of NH3 will tend to fall, can that be changed to a tendency to rise by adding H₂? If you said the tendency can be reversed in the second question, calculate the minimum pressure of H₂ needed to reverse it. Round your answer to 2 significant digits. yes no atm 00. 18 Ar 무ㅎ ?arrow_forwardIdentifying the major species in weak acid or weak base equilibria The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at equilibrium. You can leave out water itself. Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the formulas of the species that will act as neither acids nor bases in the 'other' row. You will find it useful to keep in mind that HF is a weak acid. 2.2 mol of NaOH is added to 1.0 L of a 1.4M HF solution. acids: П bases: Х other: ☐ ப acids: 0.51 mol of KOH is added to 1.0 L of a solution that is bases: 1.3M in both HF and NaF. other: ☐ 00. 18 Ararrow_forward
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