Experiment 9: Molecular Weight Determination using Freezing Point DepressionJanine Samelo
Just retrieved my files way back in my undergraduate days. Might as well share it.the purpose of this experiment is to determine the apparent molecular weight of the solute from the lowering of freezing point and to determine the extent of dimerization and dissociation of acetic acid in benzene
Experiment 9: Molecular Weight Determination using Freezing Point DepressionJanine Samelo
Just retrieved my files way back in my undergraduate days. Might as well share it.the purpose of this experiment is to determine the apparent molecular weight of the solute from the lowering of freezing point and to determine the extent of dimerization and dissociation of acetic acid in benzene
Deze presentatie wordt gebruikt tijdens het hoorcollege Niet Instrumentele Analytische Chemie zoals dit wordt gedoceerd aan het departement Gezondheidszorg en Technologie van de Katholieke Hogeschool Leuven.
PHYSICAL CHEMISTRY - Two Components Liquid Systemshahzadebaujiti
PHYSICAL CHEMISTRY - Two Components Liquid System
IMMISCIBLE LIQUIDS
Immiscible liquids are liquids which do not mix up to form homogeneous mixture.
When there are two immiscible liquids they form a so called immiscible pair.
Immiscible liquids form heterogeneous mixture.
Deze presentatie behoort bij de onderwijsleeractiviteit oefeningen in het kader van de lessen Algemene Chemie gedoceerd aan de richting Chemie van de UC Leuven-Limburg.
Hoofdstuk 2 - Zuur-base evenwichten - deel 1Tom Mortier
Presentatie behorende bij de lessen Analytische chemie voor Laboratoriumtechnologen gedoceerd aan de opleiding Biomedische Laboratoriumtechnologie van de UC Leuven-Limburg.
Hoofdstuk 5. Concentraties van oplossingen met toepassing op reacties - ChemieTom Mortier
Deze presentatie behoort bij de onderwijsleeractiviteit oefeningen in het kader van de lessen Algemene Chemie gedoceerd aan de richting Chemie van de UC Leuven-Limburg.
The liver is the largest organ in the body
It is located below the diaphragm in the right upper quadrant of the abdominal cavity and extended approximately from the right 5th rib to the lower border of the rib cage.
Deze presentatie wordt gebruikt tijdens het hoorcollege Niet Instrumentele Analytische Chemie zoals dit wordt gedoceerd aan het departement Gezondheidszorg en Technologie van de Katholieke Hogeschool Leuven.
PHYSICAL CHEMISTRY - Two Components Liquid Systemshahzadebaujiti
PHYSICAL CHEMISTRY - Two Components Liquid System
IMMISCIBLE LIQUIDS
Immiscible liquids are liquids which do not mix up to form homogeneous mixture.
When there are two immiscible liquids they form a so called immiscible pair.
Immiscible liquids form heterogeneous mixture.
Deze presentatie behoort bij de onderwijsleeractiviteit oefeningen in het kader van de lessen Algemene Chemie gedoceerd aan de richting Chemie van de UC Leuven-Limburg.
Hoofdstuk 2 - Zuur-base evenwichten - deel 1Tom Mortier
Presentatie behorende bij de lessen Analytische chemie voor Laboratoriumtechnologen gedoceerd aan de opleiding Biomedische Laboratoriumtechnologie van de UC Leuven-Limburg.
Hoofdstuk 5. Concentraties van oplossingen met toepassing op reacties - ChemieTom Mortier
Deze presentatie behoort bij de onderwijsleeractiviteit oefeningen in het kader van de lessen Algemene Chemie gedoceerd aan de richting Chemie van de UC Leuven-Limburg.
The liver is the largest organ in the body
It is located below the diaphragm in the right upper quadrant of the abdominal cavity and extended approximately from the right 5th rib to the lower border of the rib cage.
This presentation talks about the application of Law of Conservation of Mass to Chemical Equations. It has a step-by-step process of balancing equations with a bit of mole-mass conversions.
The fundamentals of chemical equilibrium including Le Chatier's Principle and solved problems for heterogeneous and homogeneous equilibrium.
**More good stuff available at:
www.wsautter.com
and
http://www.youtube.com/results?search_query=wnsautter&aq=f
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
2. An ice box is a table that is used for equilibrium calculations when
we are given starting concentrations for chemicals.
The starting concentrations have to be changed to equilibrium
concentrations before they can be used in an equilibrium
expression.
The I stands for initial, the C for change and the E for equilibrium.
An ice box looks like this:
Molarity H+
Cl-
HCl
Initial 1.0M 0.5M 0M
Change -0.3M -0.3M +0.3M
Equilibrium 0.7M 0.2M 0.3M
3. A 10.0L bulb is filled with 4.0 mol of NO(g)
, 2.0 mol of O2(g)
. The gases then reached
equilibrium according to the equation 2NO(g)
+ O2(g)
↔ 2NO2(g)
. At Equilibrium, the bulb
only contained 2.8 mol of NO(g)
. Calculate the Keq
for this reaction.
Since we aren’t given all of the equilibrium concentrations, we need to use an ice
box. First we calculate the initial concentrations and fill them into the ice box. Since
we weren’t given a concentration for the product, we assume it starts at 0M. Then
with the one given equilibrium concentration, we find the change in concentrations.
The concentrations change according to the mol ratio in the balanced equation, so O2
will change half as much as NO. Generally, reactants are used up and products are
produced so the reactants will have negative changes and the products will have
positive ones.
Then we calculate the Keq
. Keq
= (0.12)2
/(0.28)2
(0.14) = 1.3
Since the Keq
is greater than one, the products are favoured. If it was less than one
the reactants would be favoured.
NO O2
NO2
0.4M 0.2M 0M
-0.12 -0.06 +0.12
0.28M 0.14M 0.12M
4. You can also use variables to represent the change in concentrations in an ice
box.
You know you need to use variables if the starting concentrations are given but
no equilibrium concentrations are given.
For the following reaction, find all equilibrium concentrations if you started off
with 0.5M of H2
and 0.5M of I2
0.5M and Keq
= 32. H2(g)
+ I2(g)
↔ 2HI(g)
You start by setting up your equilibrium expression. 32 = (2x)2
/(0.5-x)2
Solve for x and you get x = 0.37. Then you go back to the equilibrium
concentrations and plug in x to get 0.13M for H2
and I2
and 0.74M for HI.
H2
I2
HI
0.5M 0.5M 0M
-x -x +2x
0.5-x 0.5-x 2x
5. • Sometimes when using variables, it doesn’t work out so that you can take the
square root of every term in the equilibrium expression. For these questions you
would need to use the quadratic formula: x = -b ± √(b2
-4ac)
2a
• Find all equilibrium concentrations for the following reaction if you begin with
0.2M of PCl5
and the equilibrium constant is 1.3. PCl5(g)
↔ PCl3(g)
+ Cl2(g)
• Again you set up you equilibrium expression. 1.3 = (x)2
/(0.2-x)
• This equilibrium expression is a quadratic so you need the quadratic formula to
solve for x. Once you solve, you get x = -1.48 and x = 0.176. x = -1.48 gives you
negative concentrations so you need to discard it which leaves x = 0.176 as
your answer. Plug it back into the equilibrium concentrations and you get
0.024M for PCl5
and 0.176M for PCl3
and Cl2
.
PCl5
PCl3
Cl2
0.2M 0M 0M
-x +x +x
0.2-x x x
6. Ice boxes are often needed for finding the ionization constants for acids or
bases.
You can use ice boxes to calculate the pH or ionization percentage of an acid.
Example: An unknown acid HX has a concentration of 10M and its Ka
= 0.25.
Find its pH.
For this example, you would need the quadratic formula to solve for x but in
some cases you can disregard the –x in the ice box.
The rule is: if the molarity of the acid divided by the Ka
is greater than 1000,
you can drop the –x because it does not make a significant difference in the
calculation. If the number is less than 1000, you need to keep the –x and use
the quadratic equation to solve for x.
HX H+
X-
10M 0M 0M
-x +x +x
10-x x x
7. Ice boxes are used often for equilibrium calculations and ionization
constants for acids and bases.
You know you need an ice box when:
1) You are given starting concentrations instead of equilibrium
calculations.
2) You are dealing with ionization constants for weak acids or
bases (Ka
or Kb
)
The ICE in ice box stands for Initial, Change, Equilibrium.
Only equilibrium concentrations are used in an equilibrium
expression.
Always make sure the chemical equation is balanced before you
find the changes in concentrations because they are related to the
mol ratio.
8. Information provided by Mr. Therrien’s Chemistry
12 booklet.
+ =
H
Cl
H+
Cl-
I 1M 0M 0M
C -.5 +.5 +.5
E 0.5 0.5 0.5