7.5-7.8 Quiz Flashcards
Let’s say the K value was .001 or smaller. Did the reaction proceed and if it did did it favor reactants or products?
The reaction barely proceeded
Weak acids tend to have small or large K values?
Small
What does it mean if the K value is basically 1?
This means that the reactants and products have basically an equal magnitude
How do you know when not to use an ICE table?
If you don’t have K you have to do something else instead
When Q is greater than K what is favored in the reaction?
Reactants
Let’s say the K value was less than 1. Did the reaction proceed and if it did did it favor reactants or products?
The reaction did proceed but the reactants were favored
When Q is less than K what is favored in the reaction?
Products
If volume decreases what happens to pressure?
Let’s say volume was cut in half, pressure would be multiplied by 2
When doing the multi-step K problems, what do you do to K if the reaction is multiplied by a factor?
Raise K to that factor
K^c
Let’s say the K value was 1000 or greater. Did the reaction proceed and if it did did it favor reactants or products?
The reaction goes to completion
When doing the multi-step K problems, what do you do to K if the reaction is reversed?
Do the reciprocal of K; 1/K
If pressure increases or volume decreases, what happens to the reaction?
It shifts to the side with fewer moles of gas
With ICE tables how do you know what is positive and what is negative on a chart?(aka what is used and what is produced)
If something started as 0, then it has to become positive because you cannot have a negative concentration or pressure. If nothing starts as 0, then you have to find the q value first and if q is smaller than K, reactants will be negative if not then other way around
When doing the multi-step K problems, what do you do to K if the reaction is added?
Multiply the K values
Let’s say the K value was 1 or greater. Did the reaction proceed and if it did did it favor reactants or products?
The reaction did proceed and the products were favored
How do you use a graphing calculator to solve ICE tables?
Graph the K value and then graph the function, find the intersection and that is your x value
What is really important with these ICE table problems?(3 things)
MAKE SURE THAT YOU ARE ANSWERING THE QUESTION
MAKE SURE YOU ARE WRITING THE EXPRESSIONS CORRECTLY AND STILL LEAVING OUT SOLIDS AND LIQUIDS
MAKE SURE K VALUES DONT HAVE ANY UNITS AND MAKE SURE OTHER STUFF DOES(M AND ATM)
