Metals and Corrosion

Yoz,

We have finished the topic on Metals and Corrosion.

In the topic, we briefly mentioned that salt water will promote corrosion. Do you know that this simple phenomenon has applications in forensic investigation? Read this for more information.

In addition, some of you asked why in a electric cell, the displacement occurred at the less reactive electrode. E.g. when put into the lemon, effervescence occurred at the copper electrode and not at the zinc. There is an explanation offered at this website.

Enjoy!

Picture from University of Leicester

Commendation

Dear all,

Here's the first ranking of the year.

While the results are commendable, there is definitely room for improvement.

Work harder. There is still a long journey ahead.

Chemical Analysis

Yoz, everyone,

Since you have 2 'free' days, I think you can afford some time to do some reading.

As I've mentioned in class, there are 2 types of chemical analysis - Qualitative (what?) and Quantitative (how much?).

In class, you've learnt chemical methods to detect ions. But, what are some limitations of these tests? How to chemists overcome these limitations?

To help detect really small quantities, machines have been invented. One such machines is the Atomic Absorption Spectrometer (AAS). The AAS not only identifies the metal (e.g. elemental or ionic form) present, but also tells the quantity that is present. Read this for more.

Those who are keen to find out more about analytical chemistry, you could read this. It includes the various work done by analytical chemist.

Enjoy ur weekends!

Picture from Université de Montréal

Rain rain come this way!

Hi.

In class, we discussed the importance of salts. Do you know that salts (like silver iodide and calcium chloride) are used in cloud-seding to cause rain to fall?

Quite an interesting technology that you might want to read up. What happens to the salts as they fall onto the ground? Will they cause pollution? Read this for more.



Picture from WET International

Periodic Table

Hi, all,

This week, we have gone through very briefly the development of the Periodic table. You might want to check this website out for more details.

There are many elements out there and they possess many interesting properties. One which you are very familar with is Hydrogen. Watch the following movie about Hydrogen:



Many more videos about the elements have been made by the University of Nottingham. Check them out!

Enjoy!

Cya guyz soon. Enjoy watever is left of the hols!

Accolades IV

Yoz everyone,

After a year of hardwork, we have survived this year.

Let's celebrate the success together!