Make it a point to watch these videos on electrochemistry.
This is a question somebody wanted answered so here goes.
- An acid is a substance that can produce a hydronium ion in solution according to Arrhenius theory or an acid is a proton donor according to Bronsted Lowry theory.
- So the easier it is to release a proton in an aqueous solution, the stronger is the acid.
- Now if we compare the bond strength between HI and HCl we find that the HI bond is weaker as Iodine is much larger than chlorine and cannot form an effective overlap between the s orbital of Hydrogen and the p orbital of Iodine, so relatively the H-Cl bond is stronger due to the better overlap of the sigma bonds.
- Since the H-Cl bond is stronger bond it is a weaker acid, more difficult to break the H-Cl bond as compared to H-I.
- So it would be easier to release a Hydrogen ion from HI than from HCl
- This logic may be applied to similar oxy acids too.
Mirror your iPad using Apple TV
Often when you are making a presentation or conducting a PD or even teaching you would require technologies that augment your presentations. Sometimes technologies get too complex and many a time does not integrate very well with the process. Quite a bit of time usually gets used up for setting up of these gadgets.
Newer technologies are emerging now, which can be used seamlessly for your day to day presentations. One of the most attractive and practical device I like is the iPad. The iPad in itself is an amazing piece of hardware which seamlessly integrates into your daily life. Now combine it with an Apple TV, it becomes a powerful device for presentations. The device can turn into either a white-board or a simple Power Point or Keynote Presenter.
When you wirelessly integrate this device by using the Air Play this is one of the most amazing tools any speaker, presenter or teacher can have in making their presentations more effective and even collaborative.
The videos below show how you can achieve this in a real environment.
This is an interesting and funny perspective of how the education system works.
- Important terms and concepts
- Rate law
- Order of reaction
- Law of mass action
- Photochemical reactions
- Positive catalyst
- Negative catalyst
- Homogenous catalyst
- Heterogeneous catalyst
- Mechanism of reaction
- Elementary steps
- Units of the different order
- Rate constant k
- Difference between order and molecularity
- Pseudo unimolecular reactions
- Initial rate method
- Graphical method for determining order
- Integrated rate law method
- Collision theory
- Factors affecting rates of reaction
- Energy of activation
- Threshold energy
- Transition state
- Graphs for single step reactions
- Graphs for multi steps reaction
- Energy of activation for reverse reactions
- Orientation and its effect on rates of reaction
- Energy of activation and its effect on rates of reaction
- Calculation of Activation energy
- Calculation of order of reaction from initial rate method
- Calculation of rate constant from rate law
- Calculation of concentration for first order reactions after time ‘t’
- Calculation of rate constant or decay constant from half life
- Calculation of rate of reaction from concentration and time
- Explanation of Maxwell Boltzmann distribution curve
- Arrhenius equation
- Determination of rate from concentration / volume / pressure etc and time
- Determination of order by initial rate method – problems
- Determination of rate constant ‘k’
- Determination of average rate and instantaneous rate from a graph
- Relation between rate and concentration change for determining order
- Determination of concentration / time / rate constant from integrated rate law and half life
- Arrhenius equation and determination of Ea or energy of activation
- Determination of rate constant k / Ea / or effect of temperature on rate of reaction with change in temperature using modified Arrhenius equation
- Determination of concentration of reactants after ‘n’ half lives
- Fill in the blanks = 07 Marks
- Multiple Choice Questions = 8 Marks
- Short Answers and Probmens = 34 Marks
- Total = 49 Marks
There will be a make up test of about 3 to 4 questions on Thermodynamics, this Friday 8th of March.
So review problems on
1. Hess’s Law
2. Bond energy Problems
3. Born Haber Problems
4. Enthalpy of Neutralization (Remember your lab?)
Those students interested in writing the Chem 13 exam of Waterloo University should use the form attached to add your name, so that the exams can be requested from the University. There is a fee of C$3.00.
Chem 13 Exam Registration
Thermodynamics test outline
Multiple Choice Questions 15 = 15 marks
Problems 8 = 31 Marks
Total 46 Marks
i-Clicker Power Point remote
I had a hardware based remote, since the device was left on my laptop all the time it kind of got physically damaged, the whole contraption cost around 40 $. Now that it is dead I have no plans of buying another one at the same price that is when I started looking for an app based remote for my iPhone. Tried the free version of i-Clicker and was able to set it up, took a bit of time but eventually it worked. The free version is good for Power Point files with 15 slides, then it stops working, should restart if you want to continue working.
The paid app costs $9.99, I am not sure if it is worth this price, should have had a price of $ 3 or less as it has some inherent infrastructure problems. At home it works well as you are connected to your home network, but when you are making a presentation while on the move it is kind of difficult to get access to the local network; this can also slow the loading of your slides.
However if you plan to use this as a app on the go on Windows or Mac here is a workaround.(This will eventually cost you the same as a hardware based device) I had an old router lying around at home, which I was not using, so I decided to carry this along to my workplace or anywhere I wanted to use the presentation.
1. Set up a wireless network and connect both your iPhone and your laptop you plan to use to this network. This network need not be connected to the Internet.
2. Make sure you have iTunes installed on your computer as i-Clicker needs the Bonjour service which is used by iTunes
3. Download and install i-Clicker PC control on your computer, this is also available for your Mac.
4. Download and install the i-Clicker app on your iPhone, Android, W7 or windows mobile – it works on all of these phones
Now you are all set to fire up your remote and test your Power Point remote
5. Start your i-Clicker Control on your laptop PC or Mac, you will see the different options available for iPhone select Apple iOS. Here you will see three options
a) Standard wireless
b) Direct Wireless
If you have Bonjour installed and shows a green check mark that is the easiest to work, if you plan to use the Standard Wireless it will be a good idea to assign a static IP to your wireless network, as you will need it to configure your app on your iPhone
6. Start your i-Clicker, if it is the lite version it you tell you about the number of pages you can use, click continue, you will get two options
a) Direct connection using Bonjour – Your PC name with .local will indicate it – Select it if you plan to use Bonjour, your iPhone will be connected and then it will give you the option to select new presentation
b) If you go with manual connection, you will have to enter the IP address of your computer and click the blue arrow to continue and it will connect to your computer.
7. You may have either used choice 6 a) or b) does not matter it will both give you the option to select new presentation
8. As soon as you have selected new presentation, a browse folder will open up on your PC or Mac, now select the presentation you plan to use.
Now you will see this pop up on your laptop “i-Clicker is preparing your presentation please wait” one this is done your remote goes on to a screen on your iPhone which gives you options for setting up the timer, skip and it will take you to the remote page where you have the left and right red arrows.
9. You are all ready to use your remote, there are a number of menu options which you can play around with once you are set up.