Helpful Links for Science Majors

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Formula relationships between Power, Voltage, Resistance, and Current.

Helpful for physics, engineering, and other math & science majors.

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Gringnard reagent with carbonyl groups

[illolita-blog]

How I Format and Use Flashcards

1.  Less is More: no need for a paragraph to define a term, choose the simplest and most efficient one. Also, don’t include common sense things or things you know by heart, you’ll waste time and space by writing them down.

2. Sketch it Out: Sketches can be helpful in allowing you to visualize the term/concept. 

3. Say it Out Loud: When reviewing through the cards, try and say the definition out loud. It will require you to think about it more, and it also helps with memorization. If I try and define a term in my head I usually speed through it and leave something out. 

4. Write them as you go: Don’t sit down right before finals and try and write down every term/definition from the course. It takes forever and you will kill your hand. As you finish a chapter in the course finish that set of flashcards. You will thank yourself later. 

5. Repetition: I go through my flashcards before a test maybe a thousand times (exaggeration but very close). Remember to focus on the harder ones, you’ll most likely remember the easier ones during the test. 

Here is my method:

Round 1: Go through every single card. Don’t set any aside. I usually don’t know a majority of the terms at this point, I most likely just finished writing them down.

Round 2: Go through every card again, this time setting aside ones I didn’t know or had trouble with.

Round 3: Go through the harder ones I missed.

Round 4: Add the harder ones back in with the original and shuffle.

Round 5: Go through them all and repeat the process until pleased!

[dxmedstudent]

I used to do something similar :)

[scimajorlinks-blog]

Quick reference on how to identify which atom is more basic or more acidic.

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Mechanism and examples included.

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Some oddball reaction types to help when you're stuck.

This is a professor’s final review I found online, and it explains everything step by step to make sure you understand why it works that way. Very helpful!

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Multistep Synthesis Rxn Notes

For stereospecific, use Sn2 (ex: cis -> trans)

For racemic mixture, use Sn1

In Sn1, there can be a hydride or methyl shift because 3o cation is more stable

E1 & Sn1 happen simultaneously

Zaitev’s Rule - more substituted alkenes form predominantly

E2 is also stereospecific

Dibromide elimination is done with Zn in CH3COOH

Dehydration of alcohol is an E1 rxn -> alkene

Add H2SO4 which protonates the OH group

H2O leaves then takes another proton to create the double bond

Make ether from Sn2

Simplest electrophile - H+

Addition rxn - Electrophile then Nucleophile

To make a diol -

anti-formation

1. CH3CO3H

2. H3O+

syn-formation

react with: OsO4, NMO

solvent: H2O, tert-butanol

Form primary alcohol from formaldehyde:

- Form secondary alcohol from aldehyde:

- Form tertiary alcohol from ketone:

Can only oxidize 1o or 2o alcohol with CrO2(OH)2 - end up with >C=O

Replace 1o or 2o OH group with a halogen (X group) by using SOCl2 to chlorinate or PBr3 to boronate with inverse stereochemistry because it is an Sn2 rxn

- CN- attacks less substituted Carbon

- Alcohol to ketone, use Na2Cr2O7 

- Ketone to R group with OH and CH3 by using CH3MgBr and H3O+ 

[scimajorlinks-blog]

Wonderful pictures and diagrams for those of you that are more visually oriented.

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A few options available for this reaction.

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Helpful names of some organic molecules.

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Orbital force of gravity equation that includes centripetal acceleration and tangential speed.

[peachified]

friendly reminder that “your grades don’t define you“ doesn’t mean that slacking off in school is fine, it means that you should be proud of what you HAVE achieved and not get too hung up over a bad grade every now and again.

[scimajorlinks-blog]

Graphs and formulas included.

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A practical guide to tackling undergraduate multistep synthesis questions

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Moments of inertia of some common bodies - Pearson Education

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I wanted to share this great app for physics formulas that I found. I looked, and it is both on Google Play and the App Store. Wonderful resource!