Rank solutions in order of increasing pH:

a)1.0x10^-5M HCl (aq)

b)0.20M CH3NH3Cl (aq)

c)0.20M CH3COOH (aq)

d)0.20M C6H5NH2 (aq)

I noticed that there were no calculations done in the solution manual, so is this solely based on the properties of weak acids/bases and strong acids/bases?

## Search found 22 matches

- Tue Aug 01, 2017 7:41 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 12.67
- Replies:
**1** - Views:
**418**

- Sun Jul 30, 2017 11:40 pm
- Forum: Conjugate Acids & Bases
- Topic: 12.1
- Replies:
**4** - Views:
**522**

### Re: 12.1

Also, in part f) CH3COOH, does the O2 in the answer represent the two O at. the end of the compound after hydrogen is removed? I hope my question makes sense lol

- Sun Jul 30, 2017 11:37 pm
- Forum: Conjugate Acids & Bases
- Topic: 12.1
- Replies:
**4** - Views:
**522**

### 12.1

I am a bit confused about writing the formulas of conjugate bases, in terms of what happens to hydrogen. In part d) we are given HCO3-, but then when we write the conjugate the hydrogen disappears. Is it because it is being added to the other side, causing the charge to change to 2-?

- Sun Jul 30, 2017 11:21 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 12.55
- Replies:
**1** - Views:
**321**

### 12.55

Calculate the pH, pOH, and percentage deprotonation of each of the following aqueous solutions:

a) 0.20M CH3COOH(aq)

Can someone help me out please?

a) 0.20M CH3COOH(aq)

Can someone help me out please?

- Sun Jul 30, 2017 2:51 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 11.45 Part C
- Replies:
**3** - Views:
**375**

### 11.45 Part C

C) Use your results from parts a and b to determine which is thermodynamically more stable relative to its atoms at 1000 K, Cl2 or F2. Results: Cl2= .001mol/L; 2Cl=1.1x10^-5mol/L F2=8.4x10^-3mol/L; 2F=3.2x10^-3mol/L How exactly do we know which one is the most stable based on these results?

### H20

Does it make a difference how we write h20 when we are naming coordination compounds? I have noticed that sometimes it is written as h20 and other times it's oh2.

- Sun Jul 23, 2017 11:28 pm
- Forum: Naming
- Topic: HW Question 17.31
- Replies:
**4** - Views:
**494**

### Re: HW Question 17.31

For part b of this question, which is pentaamminesulfatocobalt (III) chloride, how do we find the number of chlorines needed?

- Sun Jul 23, 2017 8:34 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Chemical Equilibrium Post Assessment 3
- Replies:
**1** - Views:
**360**

### Chemical Equilibrium Post Assessment 3

16. 0.482 mol N2 and 0.933 mol O2 are placed in a 10.0 L reaction vessel and form N2O (dinitrogen oxide): 2N2(g) + O2(g) ⇌ 2N2O(g) KC = 2.0 x 10-37 What is the composition of the equilibrium mixture? A. [N2] = 0.0482 mol.L-1; [O2] = 0.0933 mol.L-1; [N2O] = 6.6 x 10-21 mol.L-1 B. [N2] = 0.0933 mol.L-...

- Sat Jul 22, 2017 5:35 pm
- Forum: Lewis Structures
- Topic: Problem 3.45
- Replies:
**2** - Views:
**313**

### Problem 3.45

Draw the Lewis structures that contribute to the resonance hybrid of nytril chloride.

In the answer, it shows that the oxygens are perpendicular to each other. Would it be wrong to draw it with the oxygens being straight across from each other?

In the answer, it shows that the oxygens are perpendicular to each other. Would it be wrong to draw it with the oxygens being straight across from each other?

- Sat Jul 22, 2017 5:08 pm
- Forum: Lewis Structures
- Topic: Tips for completing Lewis Structures
- Replies:
**4** - Views:
**418**

### Tips for completing Lewis Structures

Do any of you have any tips for drawing Lewis structures, particularly for more complex compounds such as glycine (chapter 3, question 41). The Lewis structure makes sense when looking at the answer but I want to know what steps they took to arrive at that answer. Hope you can help!

- Sun Jul 16, 2017 11:50 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Strength of Repulsion
- Replies:
**1** - Views:
**830**

### Strength of Repulsion

Can someone explain why lone-lone pairs have a higher strength of repulsion than a lone-bonding pair or a bonding-bonding pair?

- Sun Jul 16, 2017 10:48 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charges
- Replies:
**1** - Views:
**249**

### Formal Charges

If the most stable formal charge is 0, what does that mean for other charges? Is a +1charge more stable than a -1 charge? Hope someone can help me out, thanks!

- Tue Jul 11, 2017 9:35 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Post Assessment #25
- Replies:
**1** - Views:
**432**

### Post Assessment #25

The meter was defined in 1963 as 1,650,763.73 wavelengths of radiation emitted by krypton-86. What is the wavelength of this krypton-86 radiation? To what region of the electromagnetic spectrum does this wavelength correspond? What energy does one photon of this radiation have? Can I get some help s...

- Tue Jul 11, 2017 12:28 am
- Forum: Photoelectric Effect
- Topic: How to calculate the kinetic energy, energy and frequency? [ENDORSED]
- Replies:
**14** - Views:
**3609**

### Re: How to calculate the kinetic energy, energy and frequenc [ENDORSED]

The steps to solve the problem are: 1. Use Ek = 1/2 mv^2 2. 2. Divide the total energy (work function) by Avogadro's number. 3. Use: kinetic energy of e- = energy of incoming photon – work function ****In addition to covering this in class, the course reader has detailed examples as does the textbo...

- Sun Jul 09, 2017 11:46 pm
- Forum: DeBroglie Equation
- Topic: Exercise 1.39 [ENDORSED]
- Replies:
**4** - Views:
**744**

### Exercise 1.39 [ENDORSED]

A baseball must weigh between 5.00 and 5.25 ounces (1 ounce = 28.3g). What is the wavelength of a 5.15-ounce baseball thrown at 92mph?

Can someone walk me through the steps please? Thanks!

Can someone walk me through the steps please? Thanks!

- Sun Jul 09, 2017 10:38 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Exercise 2.51
- Replies:
**1** - Views:
**361**

### Exercise 2.51

How many unpaired electrons are predicted for the ground-state configuration of each of the following atoms:

a)Bi

b)Si

c)Ta

d)Ni

How is the answer for part c 3 unpaired electrons?

a)Bi

b)Si

c)Ta

d)Ni

How is the answer for part c 3 unpaired electrons?

- Sun Jul 09, 2017 9:01 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Effective Nuclear Charge 2.37
- Replies:
**1** - Views:
**291**

### Effective Nuclear Charge 2.37

Can someone explain what the effective nuclear charge is? I don't really understand why part a of this question is false.

- Sun Jul 09, 2017 8:15 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Question 2.17
- Replies:
**1** - Views:
**340**

### Question 2.17

Since the question is asking for the amount of orbitals in subshells with l equaling a certain number, does that mean we are looking for the magnetic quantum number?

- Sun Jul 02, 2017 10:37 pm
- Forum: Balancing Chemical Reactions
- Topic: Fundamental H11
- Replies:
**2** - Views:
**551**

### Fundamental H11

I was hoping someone could explain what methods you used to balance the equation. I balanced iron first, but then got confused with how to balance the rest. How did you figure out that 4 moles of Co and Co2 were needed?

- Sun Jul 02, 2017 6:54 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: problem g13 help
- Replies:
**3** - Views:
**457**

### Re: problem g13 help

What do we do with the 3.0L of water?

- Sat Jul 01, 2017 1:30 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Fundamentals E.35
- Replies:
**2** - Views:
**539**

### Fundamentals E.35

The decay of teeth can be slowed by the use of fluoridated toothpaste. The fluoride ions convert the hydroxyapatite in tooth enamel into fluorapatite. If all the hydroxyapatite is converted into fluorapatite, by what percentage does this conversion increase the mass of enamel? I found the molar mass...

- Thu Jun 29, 2017 5:44 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Fundamental E3
- Replies:
**1** - Views:
**669**

### Fundamental E3

Question: In a nanotechnology lab you might have the capability ti manipulate individual atoms. The atoms on the left are gallium atoms (molar mass 70 g/mol), those on the right are atoms of astatine (molar mass 210 g/mol). How many astatine atoms would the pan on the right have to contain for the m...