Interview
IBDP HL Chem, Stoichiometry
- Course
- Institution
In depth and simple to understand class notes taken over the course of 2 years in a highly accredited IB school for Chemistry HL, in regards to the topic of stoichiometry
[Show more]
Seller
Follow
danielgondorf
Content preview
- Element: One type of atom (monatomic or polyatomic)- Compound: 2 or more elements that are chemically bonded
- Mixture: no chemical bond between multiple elements
- Mixture
- Homogenous and heterogenous
- Homo: Can not distinguish what has been mixed from one another Eg. Sulfuric acid
- Hetero: You can still observe the different components Eg. Gun powder
- Kinetic theory
- Movement and arrangement of particles
- Everything is made of particles which are constantly moving
- Solids
- Packed closely together. Fixed position with strong attraction forces
- Only vibrate, and can not be compressed, has a fixed volume and shape, can not flow
- Liquids
- Close together but not packed, some attraction, free to move, can slide past each other and
therefore can flow
- Can not be compressed and have no definite shape, take the shape of the container
- Gas
- Spaced far apart, move around very quickly and collide with each other
- Can be compressed because the particles are so far apart, have no fixed volume or shape
Sublimation: Dry ice and iodine
Deposition: frosting
- Evaporation can happen at any temperature
- Boiling only at a certain temperature
, Word equation vs chemical equation
- Word is consisted of words, chemical is consisting of symbols
- U have to balance chemical equation to ensure that arrangement is correct
- A reaction must first break down the reactants, and then it rearranges them
- 2H2 + O2 → 2H2O
- Balanced equation is just a ratio of all, therefore they are considered as moles, not single particle
Moles
- Mole is just a number
- Eg. pair, trio, dozen or mole
- Mole is 6.02 x 10^23, just a number
- Eg. 1 mol of carbon: 12.01g
- 1 mol of calcium: 40.08g
- Molar mass calculated by adding all the protons, neutrons and electrons mass together
- Molar masses found in data booklet. Molar masses= relative atomic masses(used for single element)
- Molar mass= relative molecular mass(only covalent molecule), relative formula mass
- 1 mol of a compound, u just add the relative atomic masses together CH4 (12.01+1.01(x4))
- NaCl (22.99 + 35.45)
- All mean the same thing!!! Do not get confused
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller danielgondorf. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.61. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67866 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now