METALSproperties

To start with

Can you list some general uses of metals and why they are an appropriate choice for it.

Topics to be studied• Reaction with dilute acids

• Reaction with oxygen

• Reaction with water or steam

• Reduction of their oxides with carbon

• Action of heat on the hydroxides, carbonates and nitrates of K, Na, Ca, Mg, Zn, Fe and Cu.

• Apparent unreactivity of Al

• Alloys and their preference over pure metals.

• Representation of Alloys

IMPORTANT VIDEOS

• https://www.youtube.com/watch?v=Tk4t-v3ZrdI

• https://www.youtube.com/watch?v=A-gh-feOsgo

• https://www.youtube.com/watch?v=7kyDDtIt680

• https://www.youtube.com/watch?v=T4pSuflO9fk

• https://www.youtube.com/watch?v=Oh0nv3ErjqU

• https://www.youtube.com/watch?v=fZM_NF93gWo

Task Summarize the reactions of K, Na, Ca, Mg, Zn, Fe and Cu.

with dilute acids (dil. HCl )

with oxygen

with water or steam

Reduction of their oxides with carbon

Action of heat on the hydroxides, carbonates and nitrates.

ALLOYSAre they better?

Are alloys better than pure metals?

• https://www.youtube.com/watch?v=9LHDSB1n11k

USES OF METALS

Aluminum –

Used in the manufacture of aircraft because of high strength and low density.

Used in making food containers as it is resistant to corrosion.

Copper –

used for making electrical wires as it’s a good conductor of electricity.

Used for making utensils as it’s a good conductor of heat

Zinc -

Used for galvanizing

Used for making alloys such as brass

Iron –

Used for making steel and stainless steel which are widely used in the manufacturing industry.

PROJECT WORK

TASK

ROLE AUDIENCE

FORMAT TASK

Documentary movie

makers/ perform

ers

Middle school

students

A documentar

y movie (15-20 mins)

To make a documentary movie covering all the points listed under the

header ‘project objective’ for any “one” of the

either element (i.E. Either iron, zinc or aluminum)

In groups of four or five create a documentary movie of length 15- 20 minutes. Covering all the points listed under the header ‘Project Objective’ for any “One” element (i.e. either iron, zinc or aluminum).

TO SIMPLIFY

Scoring instructions:

•It is suggested that you read the marking rubric well to gain an understanding of the marking criteria and work like wise.•Marks will be deducted for inappropriate use of language, body gestures, outfits etc.•A total of two marks will be deducted for late submission.•A total of two marks will be deducted for exceeding the time limit.

Project Objective:•Outline the process of

extraction of iron from hematite and its further conversion into steel

extraction of zinc from zinc blende Aluminum extraction, including the role of crayolite and the

reactions at the electrodes.•Know the uses of the Iron/Zinc/Aluminum and their alloys. •Highlight Environmental and Social Impacts of Mining and Ore Processing.

Impact on water, air and soil quality Social (Cultural and Aesthetic ) values Climate change considerations

•Suggest feasible alternatives to any two negative impacts.

Instructions for submission:The final submission should comprise of The movie on a pen drive and a cd The script for the entire movie (along with credits, the members of

the group and bibliography of all the sources used)