Search found 29 matches
Search found 29 matches • Page 1 of 1
- Sun Jun 10, 2018 11:59 pm
- Forum: Significant Figures
- Topic: Sig fifs in 750 [ENDORSED]
- Replies: 6
- Views: 460
A super easy way of counting sig figs is a quick trick I was taught in High School Chem. The Pacific and the Atlantic. You orient both oceans as if looking on a map. Then if a decimal is (P)resent then you start on the left side of the number and start counting with the first number larger than zero...
- Sun Jun 10, 2018 11:53 pm
- Forum: Electronegativity
- Topic: electronegativity chart
- Replies: 11
- Views: 807
It is definitely not necessary to memorize these numbers. It is more important to know the trends of electronegativity. A trick I use for memorizing trends is to know the element with the highest electronegativity and a line pointing in that direction is the general trend.
- Sun Jun 03, 2018 11:58 pm
- Forum: Coordinate Covalent Bonds
- Topic: transition metals
- Replies: 3
- Views: 718
It gets a little foggy in the transition metals unlike the rest of the elements. You can learn information by looking at the element that it is bonded to and how many there are of that element in relation to the transition metal.
- Sun Jun 03, 2018 11:53 pm
- Forum: Ideal Gases
- Topic: Chemical equilibrium [ENDORSED]
- Replies: 9
- Views: 921
The reaction can only be favored in the reverse reaction if something were to happen to the equation. For example if products or reactants were taken away or increased.
- Sun Jun 03, 2018 11:44 pm
- Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
- Topic: When to use the Henderson-Hasselbalch Equation
- Replies: 4
- Views: 1364
This equation is used for estimating the pH of a buffer solution.
- Sun Jun 03, 2018 11:34 pm
- Forum: Hybridization
- Topic: basics of hybridization
- Replies: 18
- Views: 931
1. Draw the lewis structure of an atom. 2. Count the number of lone pairs. 3. Count the number of bond (a double bond and a triple bond count as 1 bond in this case). 4. Add up #2 and #3 and that gives you a number. 5. The number found in #4 corresponds to hybridization. For example, 2=SP, 3=SP^2, 4...
- Sun Jun 03, 2018 11:25 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: ICE table question
- Replies: 5
- Views: 4027
Based on the given information, whether the products are increasing or decreasing, you should be able to deduce whether x is + or -.
The octet rule is when atoms are most stable with a full set of electrons (8). There are many exceptions to this rule that simply just need to be memorized. Therefore, when drawing lewis dot diagrams most times, each element needs to find it's most stable state with 8 electrons each, either shared o...
- Sun May 06, 2018 11:37 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Mass percentage
- Replies: 8
- Views: 458
The mass percentages have to equal 100% because all the elements together must add up to the total molecule. However, you may be confused for the next step in solving an empirical formula problem, when we are asked to assume that the elements are part of a 100 gram sample. This simply just makes the...
- Sun May 06, 2018 11:34 pm
- Forum: *Shrodinger Equation
- Topic: Schrodinger's Equation & Orbitals
- Replies: 3
- Views: 241
I am also confused about this equation. Do you think we will have to explain it conceptually/ can anyone explain the use of the equation?
- Sun Apr 15, 2018 12:46 pm
- Forum: General Science Questions
- Topic: Rusty on High School Chem [ENDORSED]
- Replies: 169
- Views: 124189
Make sure that you use units when you are doing stoichiometry. Keeping track of units will help you in the long run for your answer.