Search found 24 matches

by Suhail Zaveri
Sun Dec 10, 2017 6:40 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Exam HCl and NaOH question?
Replies: 3
Views: 400

Re: Exam HCl and NaOH question?

Can I ask if you remember the liters of water produced in this question, can you tell me please? Then I might be able to help?

Thanks
by Suhail Zaveri
Sun Dec 10, 2017 6:38 pm
Forum: Administrative Questions and Class Announcements
Topic: Acids and Bases
Replies: 1
Views: 257

Acids and Bases

On the last question with Hcl and NaOH was the liters of water 1.00 L? If we are not supposed to ask about the final now, please ignore this question. But was it 1.00 L or something else?

Thanks for helping
by Suhail Zaveri
Mon Dec 04, 2017 5:43 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Equation derived from the conjugate seesaw
Replies: 2
Views: 143

Re: Equation derived from the conjugate seesaw

Hello,

Usually both are negative since there are log equations involved. So negative log of pKa and negative log of pKb are supposed to add up to 14 however, what you are thinking of is Ka and Kb which are not negative and add up to Kw or 1.00 x 10^-14

Hope this helps
by Suhail Zaveri
Mon Dec 04, 2017 5:34 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Proton Transfer Reactions
Replies: 2
Views: 157

Re: Proton Transfer Reactions

Hello, Sodium is not integral to the reaction. There are plenty of examples where chemicals are not important, one is the dissociation equilibrium of a weak acid where water is not important even though it is mentioned. They are called spectator ions which you can look up to understand why some ions...
by Suhail Zaveri
Mon Dec 04, 2017 5:31 pm
Forum: Dipole Moments
Topic: Dipole moments on test 4
Replies: 2
Views: 195

Re: Dipole moments on test 4

Hello,

The easy answer is that dipole moment is different from polarity. Dipole moments are based upon lone pairs, all the chemicals you mentioned lack lone pairs and this less pull on the other atoms in the structure. Only if there are lone pairs they can have a dipole moment, does that help?
by Suhail Zaveri
Mon Dec 04, 2017 5:18 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Neutralization reactions
Replies: 4
Views: 202

Re: Neutralization reactions

Zinc has a plus 2 charge that’s why there are 2 hydroxides ok??
by Suhail Zaveri
Mon Dec 04, 2017 5:16 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Chem. Equilibrium Part 3 Post-Assess. #19
Replies: 3
Views: 303

Re: Chem. Equilibrium Part 3 Post-Assess. #19

Hello, Ok this might be confusing but please bear with me. First you have to convert moles to molarity by dividing by the 10 liters. Secondly, since nitrogen has a 2 as a coefficient you have to square the initial molarity of nitrogen you solved above. Also you have to square the x for the change fo...
by Suhail Zaveri
Mon Dec 04, 2017 4:59 pm
Forum: Conjugate Acids & Bases
Topic: Strong vs Weak Acids/bases
Replies: 4
Views: 274

Re: Strong vs Weak Acids/bases

Hello, Strong acids always completely dissociate. Strong acids have weak bonds and want to separate. Only if water is the solvent then they will dissolve completely so .10 M of Hcl will be .10 M H plus and .10 M cl- but weak acids don’t dissociate very well. Weak acids have this ionization constant ...
by Suhail Zaveri
Mon Dec 04, 2017 4:54 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Table 11.2
Replies: 4
Views: 192

Re: Table 11.2

Hello,

There are many K’s even ones for dissolving called Ksp which is for dissolving. Also It is different than Kc also Kp is different as there is a calculation to convert Kc to Kp so they can be different.

Hope this helps
by Suhail Zaveri
Mon Dec 04, 2017 4:52 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Sig Figs for Calculating pH and pOH
Replies: 4
Views: 213

Re: Sig Figs for Calculating pH and pOH

Hello,

Usually the pH is calculated by counting two digits after the decimal, usually the sig figs will be counted after the decimal place so 1.66 has two significant figures.

Hope this helps
by Suhail Zaveri
Mon Dec 04, 2017 4:50 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Neutralization reactions
Replies: 4
Views: 202

Re: Neutralization reactions

Hello,

The equation is that you add zinc hydroxide to nitrous acid which is HNO2, when you add the base and acid together, it will create a neutralization reaction which will result in one h2o molecule and zinc nitrite.

Hope this helps
by Suhail Zaveri
Mon Dec 04, 2017 4:46 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Zinc Nitrate
Replies: 2
Views: 157

Re: Zinc Nitrate

Hello, So what you basically do is draw brackets and draw nitrate in one bracket and draw zinc in another bracket. There are 2 nitrates for every zinc so add a superscript of 2 to thenotratr bracket. This is similar to (NH4)SO4 that we covered in class had a similar formula or Lewis structure. Hope ...
by Suhail Zaveri
Mon Dec 04, 2017 4:42 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Conjugates
Replies: 3
Views: 267

Re: Conjugates

Hi, No that’s not true, a weak base will have a strnot mg base as it’s conjugate, since a strong base will have a weak conjugate acid so vice versatile is true. To answer below strong acids are unstable somewhat and want to separate into ions as they have weak connections. This, Cl- is more stable w...
by Suhail Zaveri
Mon Dec 04, 2017 4:38 pm
Forum: Bronsted Acids & Bases
Topic: Identifying an acid vs. a base
Replies: 1
Views: 132

Re: Identifying an acid vs. a base

Hi, The main thing is that the equation should be there, when given the equation one can determine which chemical gains a proton or loses one. The acid loses an atom or proton and the base gains one. Bases usually contain OH minus and contain alkali earth or alkali metals. Acids contain anions like ...
by Suhail Zaveri
Mon Dec 04, 2017 4:24 pm
Forum: Dipole Moments
Topic: Polar molecules [ENDORSED]
Replies: 2
Views: 184

Re: Polar molecules [ENDORSED]

Hi, For this question, usually the molecules that are blondes to themselves or if they are hydrocarbons like methane and butane which only consist of carbon and hydrogen so thy were not polar. Also, dipole moments are different than polarity, all molecules that were not hydrocarbons or bonded to its...
by Suhail Zaveri
Mon Dec 04, 2017 4:21 pm
Forum: Naming
Topic: Using ion in names
Replies: 2
Views: 143

Re: Using ion in names

Dear student, Only if you write the formula you have to have to right the ion name, because it matters if it is on the formula, it will determine how you name it. For example: [Fe(NH3)Cl4]- where the name would be diammine dichloro ferrate(III) where the ion name is not there in the name but it is p...
by Suhail Zaveri
Mon Dec 04, 2017 4:02 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Kw= [H30+]*[OH-]
Replies: 4
Views: 219

Re: Kw= [H30+]*[OH-]

Dear student,

I don’t think water is counted because it is a solvent and a liquid. Usually in a equilibrium equation liquids and solids are omitted. Only aqueous compounds can be used in the K for equilibrium. Therefore only the ions h3o plus and OH- are included.
by Suhail Zaveri
Mon Dec 04, 2017 4:00 pm
Forum: Biological Examples
Topic: Cooridnate compound dentate
Replies: 2
Views: 254

Cooridnate compound dentate

Hello chemistry community,

I have a question, how do you know if given a formula of a coordinate compound not written in parentheses like (CH2N(CH3COO)2)2 how do you know what dentate they are? I’m not able to understand?
by Suhail Zaveri
Wed Nov 29, 2017 3:03 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular v Electron Arrangement
Replies: 2
Views: 155

Re: Molecular v Electron Arrangement

Hi, so for this question:

Line pairs are counted as bonds in the electron structure so if it is ax2e2 the electron structure is ax4 so tetrahedral. However, molecular is based on shape not actual electron number...hope this helps!
by Suhail Zaveri
Wed Nov 29, 2017 2:54 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Energy levels
Replies: 2
Views: 229

Re: Energy levels

Hi!

The energy levels are based on the highest orbitals, the higher orbitals have more energy, and it can be determined by the order of the periodic table nitrogen then oxygen and then flourine. Hope this helps!
by Suhail Zaveri
Tue Nov 07, 2017 3:44 pm
Forum: Octet Exceptions
Topic: Beryllium exception
Replies: 4
Views: 411

Re: Beryllium exception

This is only because beryllium only has 4 valence electrons, it does not have enough electrons in order to fulfill the octet rule, therefore it does not follow the octet rule due to limited electrons.
by Suhail Zaveri
Tue Nov 07, 2017 3:10 pm
Forum: Lewis Structures
Topic: Exceptions to octet rule?
Replies: 6
Views: 286

Re: Exceptions to octet rule?

The main exception to the octet rule is that the d-orbitals can be used to prove that electrons can hold more than 8 electrons, due to the d orbital having 10 electrons and the f orbital having even more. Also, atoms like lithium, boron, and beryllium have too few valence electrons to fulfill the oc...
by Suhail Zaveri
Tue Nov 07, 2017 3:05 pm
Forum: Trends in The Periodic Table
Topic: Exceptions to Trends
Replies: 2
Views: 169

Re: Exceptions to Trends

There are also exceptions to electron affinity between C and N, as Carbon as the higher electron affinity, even though it is expected for nitrogen to have a higher electron affinity, this is due to the orbitals being half filled or not half filled.
by Suhail Zaveri
Wed Oct 04, 2017 11:10 am
Forum: Balancing Chemical Reactions
Topic: Balancing Process
Replies: 11
Views: 455

Re: Balancing Process

It’s always just easy to balance elements that are not all over the place. For example balancing phosphrous would be easier than oxygen in this case...

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