Search found 10 matches

by Cinthia_Ramirez_3B
Sat Mar 18, 2017 3:28 pm
Forum: *Aldehydes
Topic: Aldehydes vs. Ketones
Replies: 2
Views: 736

Re: Aldehydes vs. Ketones

An aldehyde can only be at the end of a carbon chain while a ketone can never be at the end.
by Cinthia_Ramirez_3B
Sun Mar 12, 2017 2:19 pm
Forum: *Alkanes
Topic: Common Names on Page 94 of course reader
Replies: 2
Views: 327

Re: Common Names on Page 94 of course reader

We are expected to know common names. Also, the common name prefixes such as "iso" and "neo" are included when arranging the substituent alphabetically because it relates to the structural arrangement of the substituent.
by Cinthia_Ramirez_3B
Fri Mar 03, 2017 11:40 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalyst
Replies: 16
Views: 1265

Re: Catalyst

Intermediates cannot be in the rate law, so we use the pre-equilibrium approach to get rid of the intermediate.
by Cinthia_Ramirez_3B
Sat Feb 25, 2017 3:41 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Electrophiles
Replies: 3
Views: 360

Re: Electrophiles

Fluorine and Chlorine are electrophiles because they need one more electron to satisfy the octet rule. Electrophiles are attracted to electrons.
by Cinthia_Ramirez_3B
Sat Feb 25, 2017 3:30 pm
Forum: *Electrophiles
Topic: electrophile vs neutrophile
Replies: 2
Views: 347

Re: electrophile vs neutrophile

Electrophiles are positively charged and are attracted to electrons. Nucleophiles are negatively charged and donate electrons.
by Cinthia_Ramirez_3B
Sun Feb 12, 2017 9:32 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagrams
Replies: 2
Views: 363

Re: Cell Diagrams

Yes, the anode is on the left while the cathode is on the right. They are separated by the salt bridge, represented by the double bars (II). I believe the order doesn't matter; you just separate the species in terms of phase and separate them with commas if they are the same phase.
by Cinthia_Ramirez_3B
Sun Feb 12, 2017 9:09 pm
Forum: Balancing Redox Reactions
Topic: K and K(sub)a
Replies: 2
Views: 371

Re: K and K(sub)a

From the solution, it appears that K is for 2 moles 2 HF (aq) ->2 H+(aq) + 2F-(aq) while k(sub)a is for 1 mole HF (aq) ->2 H+(aq) + 2F-(aq) K(sub)a = ([H+][F-])/[HF]. K = ([H+]^2*[F-]^2])/[HF]^2 That is why in the end you take the square root of K to get K(sub)a since K has the products and reactant...
by Cinthia_Ramirez_3B
Sun Feb 05, 2017 3:08 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018574

Re: Post All Chemistry Jokes Here

Did you hear about the man who got cooled to absolute zero?

He's 0K now.
by Cinthia_Ramirez_3B
Sun Jan 29, 2017 2:34 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018574

Re: Post All Chemistry Jokes Here

Pick up line
by Cinthia_Ramirez_3B
Sun Jan 22, 2017 4:17 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: HW 8.51
Replies: 1
Views: 273

Re: HW 8.51

Since the question asks to to calculate the enthalpy released per liter for the reaction (exothermic reaction), the negative sign is not necessary.

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